01The verdict: is Austin water safe?
Austin's drinking water has significant quality concerns based on EPA testing data. With a grade of F (31.2/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 621 water systems serve approximately 1,789,562 residents using surface water (rivers, lakes, or reservoirs).
The concern
Copper is over its legal limit
Measured at 2.41 mg/L against the EPA Action Level of 1.3 mg/L. The ledger below shows how far over — and which filter removes it.
See the measurement ↓ The good news
Lead is well under the limit
90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓ Keep watching
lithium is approaching its limit
Measured at 107.0000 µg/L — 120% of the 0.004 µg/L limit. Within the rules, but with less headroom than you'd want.
See the ledger ↓Austin's drinking water received a grade of F (31.2 out of 100), indicating failing water quality. The city's 621 water systems serve approximately 1,789,562 residents using surface water.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. UCMR 5 testing detected 10 PFAS compounds, with levels exceeding EPA maximum contaminant levels in the water supply. The system has 9527 violations on record, including 1288 health-based violations. 2515 remain unresolved.
Austin ranks #1061 out of 1067 cities in Texas for water quality, placing it among the lowest-rated in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. Of particular concern: PFAS "forever chemical" levels exceed the 2024 EPA maximum contaminant levels. These synthetic compounds don't break down naturally and require specialized filtration such as reverse osmosis or granular activated carbon. Hexavalent chromium (chromium-6) was detected at 4.01 µg/L in UCMR 3 testing. While below California's 10 µg/L limit and with no federal MCL set, residents sensitive to this contaminant may consider reverse osmosis filtration. As a major metropolitan system serving over 1.8M residents, Austin faces large-scale infrastructure challenges including aging pipes and the complexity of treating water across a vast distribution network. The system has seen 2254 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
How the 31.2/100 breaks down Methodology →
ViolationsHistorical violation record including health-based and monitoring violations.
0 / 45F
Lead & CopperLead at 0.0 ppb (90th percentile).
16 / 20B
Contaminants10 PFAS compounds detected.
6.2 / 20F
ComplianceMonitoring and reporting compliance with EPA regulations.
5 / 10D
Source RiskWater source: Surface water.
4 / 5B
02What's in Austin's water
Every contaminant flagged in Austin, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
12 detections · sorted by % of legal limit
Over the limit Elevated — watch Within limits
0 50% LEGAL LIMIT 150%
Over Limit — EPA Action Level: 1.3 mg/L
Exceeds the EPA action level. Copper leaches from household plumbing — flush taps for 30 seconds before drinking, and consider a certified filter. Exceeds Limit What to do →
lithium PFAS / Forever Chemical
107.0000 µg/L 120% of limit
Strontium Inorganic
2020.0 µg/L 120% of limit
Manganese Inorganic
72.0 µg/L 120% of limit
NDMA (N-Nitrosodimethylamine) Disinfection Byproduct
48.0 ng/L 120% of limit
Chlorate Disinfection Byproduct
4510.0 µg/L 120% of limit
Molybdenum Inorganic
59.40 µg/L 120% of limit
Lithium Inorganic
107.0 µg/L 120% of limit
Vanadium Inorganic
5.25 µg/L 25% of limit
41 contaminants tested under EPA SDWIS, LCR and UCMR programs
· 21 detected
· 1 PFAS over EPA MCL · PFAS hazard index 1.88 (above the 1.0 threshold) Contaminants without a federal MCL are shown against the strictest state or advisory level named in each row.
All Tested Contaminants
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | 0.0 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 2.41 | 1.3 | mg/L | Inorganic | Over Limit |
| 11Cl-PF3OUdS | ND | HI | µg/L | PFAS | Not Detected |
| 4:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 6:2 FTS 6:2 FTSPFAS A fluorotelomer sulfonate commonly found at sites contaminated with aqueous film-forming foam (AFFF) used in firefighting. Health EffectsPotential liver toxicity and endocrine disruption. Less studied but identified as a contaminant of concern. EPA LimitNo individual MCL (not yet regulated) Common SourcesFirefighting foam (AFFF), airports, military bases, and industrial facilities. | 0.018 | HI | µg/L | PFAS | Detected |
| 8:2 FTS | ND | HI | µg/L | PFAS | Not Detected |
| 9Cl-PF3ONS | ND | HI | µg/L | PFAS | Not Detected |
| ADONA | ND | HI | µg/L | PFAS | Not Detected |
| HFPO-DA HFPO-DA (GenX)PFAS A replacement for PFOA in manufacturing, marketed as safer but still a persistent "forever chemical." Also known as GenX. Health EffectsLiver and kidney effects, reproductive toxicity, immune system effects, and potential cancer risk. EPA Limit10 ppt MCL Common SourcesFluoropolymer manufacturing (used as PFOA replacement), industrial wastewater discharge. | ND | 0.01 | µg/L | PFAS | Not Detected |
| lithium LithiumInorganic A naturally occurring alkali metal found in groundwater. Monitored under UCMR 5 to assess occurrence in drinking water. Health EffectsKidney effects at high doses. Low-level exposure effects under study; some research suggests neurological effects. EPA LimitNo MCL (monitoring only under UCMR 5) Common SourcesNatural mineral deposits, geothermal water, and industrial discharge. | 107.000 | HI | µg/L | PFAS | Detected |
| NEtFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| NFDHA | ND | HI | µg/L | PFAS | Not Detected |
| NMeFOSAA | ND | HI | µg/L | PFAS | Not Detected |
| PFBA PFBAPFAS One of the shortest-chain PFAS compounds. Very mobile in water and difficult to remove with standard filtration. Health EffectsThyroid effects, potential developmental toxicity. Shorter half-life in body than long-chain PFAS. EPA LimitNo individual MCL (not yet regulated) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and firefighting foam. | 0.010 | HI | µg/L | PFAS | Detected |
| PFBS PFBSPFAS A short-chain PFAS used as a replacement for PFOS. While it clears the body faster than long-chain PFAS, it still persists in the environment. Health EffectsThyroid effects, reproductive and developmental toxicity, kidney effects. EPA LimitPart of Hazard Index (1.0) Common SourcesIndustrial discharge, firefighting foam, and as a replacement chemical in manufacturing. | 0.012 | HI | µg/L | PFAS | Detected |
| PFDA | ND | HI | µg/L | PFAS | Not Detected |
| PFDoA | ND | HI | µg/L | PFAS | Not Detected |
| PFEESA | ND | HI | µg/L | PFAS | Not Detected |
| PFHpA PFHpAPFAS A medium-chain PFAS compound found in various environmental samples. Less studied than PFOA/PFOS but still considered a contaminant of concern. Health EffectsLiver effects, potential developmental toxicity, and endocrine disruption. EPA LimitPart of Hazard Index (1.0) Common SourcesDegradation of longer-chain PFAS, industrial discharge, and contaminated water sources. | ND | HI | µg/L | PFAS | Not Detected |
| PFHpS | ND | HI | µg/L | PFAS | Not Detected |
| PFHxA PFHxAPFAS A short-chain PFAS replacement chemical widely used after manufacturers phased out longer-chain PFAS. Very commonly detected in water. Health EffectsLiver and kidney effects, potential thyroid disruption. Considered less toxic than long-chain PFAS but still persistent. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial processes, firefighting foam (AFFF), food packaging, and textile treatment. | 0.007 | HI | µg/L | PFAS | Detected |
| PFHxS PFHxSPFAS A medium-chain PFAS found in firefighting foam and consumer products. It has a long half-life in the human body, similar to long-chain PFAS. Health EffectsImmune system effects, thyroid disruption, and potential reproductive and developmental harm. EPA LimitPart of Hazard Index (1.0) Common SourcesFirefighting foam (AFFF), waterproof textiles, food packaging, and industrial discharge. | 0.028 | HI | µg/L | PFAS | Detected |
| PFMBA | ND | HI | µg/L | PFAS | Not Detected |
| PFMPA | ND | HI | µg/L | PFAS | Not Detected |
| PFNA PFNAPFAS A long-chain PFAS compound used in manufacturing fluoropolymers. It bioaccumulates in the body and is very persistent in the environment. Health EffectsDevelopmental effects, liver toxicity, immune suppression, and potential cancer risk. EPA LimitPart of Hazard Index (1.0) Common SourcesFluoropolymer manufacturing, industrial emissions, and contaminated water sources. | 0.005 | HI | µg/L | PFAS | Detected |
| PFOA PFOAPFAS A long-chain PFAS ("forever chemical") once widely used in nonstick coatings and firefighting foam. It persists in the body and environment for years. Health EffectsLinked to kidney and testicular cancer, thyroid disease, elevated cholesterol, and reproductive issues. EPA Limit4.0 ppt MCL Common SourcesIndustrial discharge, firefighting foam (AFFF), nonstick cookware manufacturing, and contaminated groundwater. | ND | 0.004 | µg/L | PFAS | Not Detected |
| PFOS PFOSPFAS A long-chain PFAS compound historically used in stain-resistant coatings and firefighting foam. One of the most studied and persistent PFAS chemicals. Health EffectsLiver damage, immune system suppression, thyroid disruption, increased cholesterol, and potential cancer risk. EPA Limit4.0 ppt MCL Common SourcesFirefighting foam (AFFF), industrial sites, stain-resistant fabric treatments, and contaminated groundwater. | 0.007 | 0.004 | µg/L | PFAS | Over MCL |
| PFPeA PFPeAPFAS A short-chain PFAS compound commonly detected in drinking water. One of the most frequently found PFAS in UCMR 5 monitoring. Health EffectsLess studied than PFOA/PFOS. Potential liver and thyroid effects. Research is ongoing. EPA LimitNo individual MCL (not yet regulated) Common SourcesIndustrial discharge, firefighting foam degradation, and consumer products. | 0.016 | HI | µg/L | PFAS | Detected |
| PFPeS | 0.005 | HI | µg/L | PFAS | Detected |
| PFTA | ND | HI | µg/L | PFAS | Not Detected |
| PFTrDA | ND | HI | µg/L | PFAS | Not Detected |
| PFUnA | ND | HI | µg/L | PFAS | Not Detected |
Data source: EPA SDWIS, UCMR 5, local utility CCR.
Pb Lead in Texas
Cities ranked by 90th-percentile lead PF PFAS in Texas
Cities ranked by compounds detected Cu Copper in Texas
Cities ranked by 90th-percentile copper
Cities ranked by 90th-percentile lead PF PFAS in Texas
Cities ranked by compounds detected Cu Copper in Texas
Cities ranked by 90th-percentile copper
03Austin's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 9527 violations on record, including 1288 health-based violations. 2515 remain unresolved.
2017 400 98 open
2018 396 73 open
2019 507 103 open
2020 557 125 open
2021 512 106 open
2022 590 83 open
2023 207 68 open
2024 776 115 open
2025 169 108 open
2026 clean
1 of the last ten years was clean. The numbered years had EPA violations — red when any were health-based, amber when they were paperwork or missed-testing issues.
349 health-based in 10 yrs 3765 monitoring & paperwork 879 still unresolved
PFAS10 PFAS "forever chemical" compounds detectedPFAS levels exceed EPA maximum contaminant levels. Reverse osmosis or activated carbon filtration recommended.
UpdateWater quality data updatedLatest EPA compliance and testing data incorporated into Austin's water quality assessment. Grade: F (31.2/100).
Violation23 drinking water violations recordedContaminants: Lead and Copper Rule, Public Notice, TTHM.Open
Violation8 drinking water violations recorded1 health-based. Contaminants: Public Notice, Revised Total Coliform Rule, Interim Enhanced Surface Water Treatment Rule.Open
Violation19 drinking water violations recorded4 health-based. Contaminants: Public Notice, Lead and Copper Rule, Revised Total Coliform Rule.Open
DisasterSEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODINGFederal disaster declaration (FEMA DR-4879). Flood event — may have impacted local water infrastructure.
Lead, 90th percentileppb · lower is better
▲ Up 6.1 ppb since 1992. Latest reading: 7.4 ppb (2026) — 49% of the action level. Sampled at higher-risk homes (90th percentile).
Copper, 90th percentilemg/L · lower is better
▼ Down 0.32 mg/L since 1994. The latest reading (2.4 mg/L, 2025) is over the action level. Sampled at higher-risk homes (90th percentile).
04Where Austin's water comes from
Austin's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Source
Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Treatment
Local treatment
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
Distribution
621 systems
621 water systems (85 wholesalers), operated under local government ownership.
Delivery
1,789,562 people
Residents served across Austin's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 1,789,562 people through 621 water systems.
| System name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF AUSTIN WATER & WASTEWATER | TX2270001 | 1,115,323 | Surface Water |
| TRAVIS COUNTY WCID 17 | TX2270027 | 45,165 | Surface Water |
| PASEO DEL ESTE MUD 1 | TX0710186 | 36,773 | Purchased Surface Water |
| WEST TRAVIS COUNTY PUBLIC UTILITY AGENCY | TX2270235 | 28,215 | Surface Water |
| WINDERMERE COMMUNITY | TX2270161 | 21,231 | Purchased Surface Water |
| WELLS BRANCH MUD 1 | TX2270227 | 18,015 | Purchased Surface Water |
| SONTERRA MUD | TX2460157 | 16,614 | Purchased Surface Water |
| NORTHTOWN MUD | TX2270264 | 11,520 | Purchased Surface Water |
| NORTH AUSTIN MUD 1 | TX2270226 | 11,133 | Purchased Surface Water |
| AUSTINS COLONY | TX2270255 | 9,987 | Groundwater |
| OLD EGYPT SUBDIVISION | TX1700666 | 8,442 | Groundwater |
| WILLIAMSON COUNTY WSID 3 | TX2460152 | 8,265 | Purchased Groundwater |
| GRAY UTILITY SERVICE | TX0360005 | 8,004 | Groundwater |
| PLUM CREEK | TX1050028 | 7,065 | Purchased Surface Water |
| PINE TRAILS UTILITY | TX1010535 | 6,969 | Purchased Surface Water |
| TRAVIS COUNTY MUD 4 | TX2270325 | 6,816 | Surface Water |
| INGRAM WATER SUPPLY | TX1330011 | 5,955 | Groundwater |
| TRAVIS COUNTY WCID 18 | TX2270083 | 5,733 | Surface Water |
| OAK TRAIL SHORES | TX1110004 | 5,676 | Surface Water |
| COTTONWOOD CREEK MUD 1 | TX2270355 | 5,082 | Purchased Groundwater |
| LAZY NINE MUD 1B | TX2270417 | 4,669 | Purchased Surface Water |
| TANGLEWOOD ON TEXOMA | TX0910052 | 4,341 | Purchased Surface Water |
| SHADY HOLLOW MUD | TX2270229 | 4,269 | Purchased Surface Water |
| WILLIAMSON COUNTY MUD 11 | TX2460159 | 4,248 | Purchased Surface Water |
| LAKE MEDINA SHORES | TX0100037 | 4,032 | Groundwater |
| CAROLYNN ESTATES | TX1070106 | 3,906 | Surface Water |
| DECKER HILLS | TX1700386 | 3,780 | Groundwater |
| BRITTMOORE UTILITY | TX1011014 | 3,732 | Groundwater |
| LOMA VISTA WATER SYSTEM | TX1330041 | 3,720 | Groundwater |
| WOODLAND OAKS SUBDIVISION | TX1700648 | 3,666 | Groundwater |
| MITCHELL COUNTY UTILITY | TX1680004 | 3,612 | Groundwater |
| LOMETA REGIONAL WATER | TX1410002 | 3,609 | Surface Water |
| METROPLEX HOMESTEADS WATER SUPPLY | TX1260074 | 3,588 | Groundwater |
| WILLIAMSON COUNTY MUD 10 | TX2460145 | 3,513 | Purchased Surface Water |
| WILBARGER CREEK MUD 1 | TX2270380 | 3,459 | Purchased Groundwater |
| HAYS COUNTY WCID 2 | TX1050148 | 3,381 | Purchased Surface Water |
| TRAVIS COUNTY MUD 14 | TX2270353 | 3,333 | Purchased Groundwater |
| TRAVIS COUNTY MUD 2 | TX2270241 | 3,294 | Purchased Groundwater |
| NORTHEAST WASHINGTON COUNTY | TX2390043 | 3,219 | Groundwater |
| PALOMA LAKE MUD 1 | TX2460164 | 3,111 | Purchased Surface Water |
| WOODCREEK UTILITY CO 2 | TX1050039 | 3,096 | Ground Water Under Influence |
| LAKESIDE WCID 2-C | TX2270373 | 3,084 | Purchased Surface Water |
| BRIARCREEK SUBDIVISION | TX2270354 | 3,075 | Purchased Groundwater |
| WESTERN HILLS WATER SYSTEM | TX1550072 | 3,048 | Groundwater |
| THE COMMONS WATER SUPPLY | TX1012978 | 3,018 | Groundwater |
| LAKE CONROE VILLAGE | TX1700543 | 2,961 | Groundwater |
| CANYON CREEK ADDITION | TX1110070 | 2,895 | Groundwater |
| HAYS COUNTY WCID 1 | TX1050137 | 2,850 | Purchased Surface Water |
| LAKESIDE MUD 3 | TX2270422 | 2,832 | Purchased Surface Water |
| NORTH CUSTER ROAD PLANT | TX0430077 | 2,754 | Groundwater |
| VISTA OAKS MUD | TX2460139 | 2,724 | Purchased Surface Water |
| HERON LAKES ESTATES | TX1013089 | 2,712 | Groundwater |
| WOODCREEK UTILITY CO 1 | TX1050037 | 2,700 | Groundwater |
| LAKE PALESTINE WATER | TX1070198 | 2,568 | Groundwater |
| WESTERN LAKE ESTATES | TX1840014 | 2,526 | Groundwater |
| SOUTH BUDA WCID 1 | TX1050154 | 2,517 | Purchased Surface Water |
| GREENWOOD VILLAGE | TX1010011 | 2,514 | Groundwater |
| LAKE BUCHANAN | TX1500037 | 2,484 | Surface Water |
| GRAND ESTATES | TX1700853 | 2,433 | Groundwater |
| EAGLE CREEK RANCH | TX2470022 | 2,409 | Groundwater |
| LAKESIDE WCID 2D | TX2270410 | 2,385 | Purchased Surface Water |
| CHEROKEE SHORES WATER SUPPLY | TX1070206 | 2,343 | Surface Water |
| KELLY LANE WCID 1 | TX2270382 | 2,331 | Purchased Groundwater |
| WHITE BLUFF | TX1090073 | 2,319 | Groundwater |
| HOLIDAY VILLAGES OF LIVINGSTON | TX2040067 | 2,272 | Groundwater |
| CANDLELIGHT HILLS SUBDIVISION | TX1010532 | 2,265 | Purchased Surface Water |
| PALOMA LAKE MUD 2 | TX2460165 | 2,265 | Purchased Surface Water |
| THE COLONY MUD 1A | TX0110053 | 2,262 | Purchased Groundwater |
| ARROWHEAD LAKE & FRONTIER LAKE | TX1700171 | 2,208 | Groundwater |
| CANYON LAKE MOBILE HOME ESTATES | TX0460063 | 2,202 | Groundwater |
| CALLENDER LAKE | TX2340007 | 2,103 | Groundwater |
| COMANCHE COVE & HERITAGE HEIGHTS | TX1110060 | 2,073 | Groundwater |
| CHINA SPRING WATER | TX1550021 | 2,070 | Groundwater |
| SHERWOOD SHORES | TX0910040 | 2,031 | Groundwater |
| SANDY CREEK RANCHES SUBDIVISION | TX2270054 | 2,022 | Groundwater |
| CROWLEY 1 ACRE SKY CORP WATER | TX1260011 | 2,016 | Groundwater |
| RIDGECREST | TX0910035 | 1,968 | Purchased Surface Water |
| IVANHOE LAND OF LAKES | TX2290010 | 1,968 | Groundwater |
| CHISHOLM SPRINGS | TX2490060 | 1,947 | Groundwater |
| OAK VILLAGE NORTH | TX0460037 | 1,944 | Groundwater |
| WESTWOOD BEACH | TX1070085 | 1,845 | Groundwater |
| CLEAR CREEK FOREST SECTION 12 | TX1700437 | 1,836 | Groundwater |
| CARRIAGE HILLS | TX1700279 | 1,833 | Groundwater |
| CEDAR POINT | TX1870155 | 1,827 | Groundwater |
| HIGHSAW | TX1070124 | 1,815 | Groundwater |
| MARY FRANCIS SUBDIVISION | TX1010100 | 1,785 | Groundwater |
| CYPRESS RANCH WCID 1 | TX2270352 | 1,785 | Groundwater |
| HOLIDAY VILLAGES OF FORK | TX2500058 | 1,761 | Groundwater |
| LOOP 360 WSC | TX2270242 | 1,743 | Surface Water |
| LAKESIDE WCID 1 | TX2270408 | 1,680 | Purchased Surface Water |
| PHOENIX WATER WORKS | TX1070211 | 1,647 | Groundwater |
| TRAVIS COUNTY MUD 13 | TX2270388 | 1,644 | Purchased Surface Water |
| TRAVIS COUNTY MUD 12 | TX2270398 | 1,644 | Purchased Surface Water |
| LAKE LIVINGSTON VILLAGE | TX1870156 | 1,638 | Groundwater |
| THE RESORT AT EAGLE MOUNTAIN LAKE | TX2200344 | 1,605 | Purchased Surface Water |
| COMANCHE HARBOR & PORT OCALL | TX1110022 | 1,578 | Purchased Surface Water |
| MID-TEX UTILITIES | TX1050157 | 1,569 | Purchased Surface Water |
| PLANTATION ON COTTON BAYOU | TX0360096 | 1,557 | Groundwater |
| REUNION RANCH WCID | TX1050175 | 1,557 | Purchased Surface Water |
| MEADOW WOODS WATER SUPPLY | TX1050077 | 1,554 | Groundwater |
| BEACHWOOD ESTATES & NORTH TRINIDAD | TX1070069 | 1,551 | Surface Water |
| CANYON SPRINGS WATER | TX0460022 | 1,528 | Groundwater |
| WEST MONTGOMERY | TX1010670 | 1,515 | Groundwater |
| TRAIL CREEK WATER SYSTEM | TX0610203 | 1,509 | Groundwater |
| EAGLES BLUFF | TX0370052 | 1,485 | Groundwater |
| SHALE CREEK COMMUNITY | TX0610238 | 1,470 | Groundwater |
| FOXBANE COMBINED WS | TX0610164 | 1,455 | Groundwater |
| SPICEWOOD BEACH | TX0270011 | 1,452 | Ground Water Under Influence |
| RIVERCREST WATER SYSTEM | TX2270041 | 1,437 | Purchased Surface Water |
| TRAVIS COUNTY MUD 11 | TX2270379 | 1,437 | Purchased Surface Water |
| LAKESIDE WCID 2-B | TX2270371 | 1,419 | Purchased Surface Water |
| BENTWATER ON LAKE GRANBURY | TX1110116 | 1,374 | Groundwater |
| DEERWOOD SUBDIVISION | TX1700264 | 1,359 | Groundwater |
| LAKESIDE WCID 2-A | TX2270409 | 1,353 | Purchased Surface Water |
| MOUNTAIN LAKES ADDITION | TX0720037 | 1,347 | Groundwater |
| LEISUREWOODS WATER | TX1050043 | 1,338 | Groundwater |
| COUNTRY SIDE ESTATES | TX1230037 | 1,338 | Purchased Surface Water |
| LAKE RIDGE WATER SYSTEM | TX2330029 | 1,300 | Groundwater |
| ESTATES WOODLAND II | TX1700852 | 1,248 | Groundwater |
| WESTERN HILLS HARBOR | TX1110005 | 1,245 | Groundwater |
| LAKES OF ROSEHILL WATER SYSTEM | TX1013050 | 1,242 | Groundwater |
| CARRIZO WATER CORP FOREST GROVE | TX1070074 | 1,224 | Groundwater |
| KELLY LANE WCID 2 | TX2270386 | 1,221 | Purchased Groundwater |
| SENNA HILLS MUD | TX2270316 | 1,215 | Purchased Surface Water |
| LAKE CONROE FOREST SUBDIVISION | TX1700134 | 1,185 | Groundwater |
| CLEAR LAKES | TX2500017 | 1,152 | Groundwater |
| BLUE WATER SHORES | TX1110079 | 1,137 | Groundwater |
| THE CLIFFS | TX1820061 | 1,115 | Surface Water |
| TRAVIS COUNTY WCID 20 | TX2270231 | 1,092 | Surface Water |
| WESTSIDE RURAL WSC | TX2200079 | 1,077 | Groundwater |
| RIM ROCK RANCH | TX0460211 | 1,065 | Ground Water Under Influence |
| OAK NORTH MOBILE HOMES ESTATES | TX0150135 | 1,059 | Groundwater |
| FOUR SEASONS | TX1330113 | 1,059 | Groundwater |
| DOGWOOD HILLS | TX1700129 | 1,059 | Groundwater |
| BARTON CREEK LAKESIDE | TX2270282 | 1,023 | Surface Water |
| HILL COUNTRY NORTHWEST CHERRY HOLLOW | TX2270173 | 1,002 | Groundwater |
| MOUNTAIN VIEW SUBDIVISION | TX1110035 | 999 | Groundwater |
| HIDDEN FOREST ESTATES | TX1700173 | 990 | Groundwater |
| ALDINE VILLAGE SUBDIVISION | TX1010931 | 981 | Groundwater |
| SOUTHERN HILLS | TX1330128 | 975 | Groundwater |
| CLASSIC PINES SUBDIVISION | TX1013144 | 960 | Groundwater |
| OAK MEADOWS | TX1050100 | 954 | Groundwater |
| CARSON RANCH | TX2200343 | 954 | Groundwater |
| COLONIAL HILLS | TX1010116 | 942 | Groundwater |
| TAL TEX | TX2460064 | 939 | Purchased Surface Water |
| COOLCREST WATER SYSTEM | TX0150046 | 936 | Groundwater |
| CREEKSIDE ESTATES SOUTH | TX1011647 | 921 | Groundwater |
| SUNSHINE MEADOWS WATER UTILITY | TX2490040 | 918 | Groundwater |
| NORTH BELT FOREST | TX1011999 | 897 | Groundwater |
| SAN GABRIEL RIVER RANCHES | TX2460046 | 891 | Groundwater |
| PINE HARBOR SUBDIVISION | TX1580023 | 870 | Groundwater |
| CHISHOLM HILLS ESTATES | TX2490044 | 867 | Groundwater |
| HARBOR POINT | TX2280035 | 856 | Purchased Surface Water |
| WHIPPOORWILL BAY SUBDIVISION | TX1110027 | 840 | Groundwater |
| SUNDANCE ADDITION | TX1260025 | 834 | Groundwater |
| LAKE VISTA UTILITY | TX1490017 | 834 | Groundwater |
| LAKEWAY HARBOR SUBDIVISION | TX2120064 | 831 | Surface Water |
| SHADOW BAY SUBDIVISION | TX1700393 | 828 | Groundwater |
| SOUTHERN CROSSING WATER SYSTEM PHASE 2 | TX1460158 | 822 | Groundwater |
| LAKE CREEK FOREST | TX1700529 | 822 | Groundwater |
| ERLUND SUBDIVISION | TX1330036 | 821 | Groundwater |
| LAKEWOOD WATER | TX0100047 | 816 | Groundwater |
| RIVERWOOD FOREST | TX0790405 | 816 | Groundwater |
| FULBROOK SUBDIVISION WATER PLANT | TX0790385 | 807 | Groundwater |
| MESA RIDGE SUBDIVISION | TX2490047 | 795 | Groundwater |
| SAFARI WATER SYSTEM | TX1070247 | 792 | Groundwater |
| TWIN CREEK SUBDIVISION | TX1260038 | 780 | Groundwater |
| SHADED LANE ESTATES | TX1260103 | 777 | Groundwater |
| BARROW RANCH | TX0360122 | 774 | Groundwater |
| HULON LAKES SUBDIVISION | TX1700014 | 771 | Groundwater |
| COUNTRY SPRINGS WATER | TX0150421 | 765 | Groundwater |
| PINE TRAIL SHORES | TX2120035 | 762 | Groundwater |
| WREN WATER SYSTEM | TX0610009 | 759 | Groundwater |
| WINDMILL RANCH SUBDIVISION | TX0460221 | 756 | Purchased Surface Water |
| STABLE GATES | TX1013103 | 747 | Groundwater |
| CRESTWOOD WATER CO | TX1580016 | 744 | Groundwater |
| ROSEMEADOWS III | TX0790396 | 738 | Groundwater |
| HILLS OF OLIVER CREEK | TX2490046 | 732 | Groundwater |
| TOWER TERRACE | TX0360069 | 729 | Groundwater |
| THE TRAILS SUBDIVISION | TX1460199 | 729 | Groundwater |
| CIMARRON COUNTRY | TX1700555 | 726 | Groundwater |
| STONY HILLS WATER SYSTEM | TX0610220 | 723 | Groundwater |
| TANGLEWOOD ESTATES | TX1840011 | 720 | Groundwater |
| ESTATES OF WILLOW CREEK | TX1013262 | 714 | Groundwater |
| DECKER WOODS SUBDIVISION | TX1700330 | 711 | Groundwater |
| SHADY HOLLOW ESTATES WSC | TX2270212 | 711 | Groundwater |
| DEER RUN MEADOWS | TX0790612 | 708 | Groundwater |
| VAN ZANDT FARMS | TX2200341 | 702 | Groundwater |
| ST STEPHENS EPISCOPAL SCHOOL | TX2270018 | 700 | Purchased Surface Water |
| ONION CREEK MEADOWS | TX2270059 | 696 | Groundwater |
| LUNAR LANE WATER SYSTEM | TX2200208 | 690 | Groundwater |
| FAIRWAY CROSSING | TX1013127 | 684 | Groundwater |
| WESTERN HOMES SUBDIVISION | TX1010028 | 678 | Groundwater |
| GUADALUPE HEIGHTS UTILITY | TX1330009 | 672 | Groundwater |
| TIMBERLOCH ESTATES | TX1700641 | 669 | Groundwater |
| THE COLONY MUD 1B | TX0110054 | 657 | Purchased Groundwater |
| OAK FOREST SOUTH WATER SUPPLY | TX1330091 | 648 | Groundwater |
| THE COVES WSC | TX2270324 | 648 | Groundwater |
| BRUSHY BEND PARK | TX2460050 | 645 | Purchased Surface Water |
| CRYSTAL FOREST SUBDIVISION | TX1700096 | 642 | Groundwater |
| THE RETREAT WATER SUPPLY | TX1260127 | 633 | Groundwater |
| TRES PALACIOS OAKS SUBDIVISION | TX1610017 | 630 | Groundwater |
| HUNTERWOOD SUBDIVISION WATER SYSTEM | TX1110083 | 615 | Groundwater |
| WALNUT SPRINGS | TX1700128 | 615 | Groundwater |
| TRAVIS COUNTY WCID 19 | TX2270207 | 597 | Purchased Surface Water |
| ESTATES OF LEGENDS RANCH | TX1700702 | 591 | Groundwater |
| PORT ADVENTURE | TX2280031 | 591 | Groundwater |
| PECAN UTILITIES OAK RIDGE SUBDIVISION | TX1500043 | 588 | Purchased Surface Water |
| NORTH FORK ESTATES | TX2200329 | 588 | Groundwater |
| CRAZY HORSE SUBDIVISION | TX1160067 | 582 | Groundwater |
| WALNUT HILLS | TX1300034 | 579 | Groundwater |
| RIDGE HARBOR | TX0270081 | 573 | Surface Water |
| RIO ANCHO SUBDIVISION | TX0270141 | 570 | Groundwater |
| LAKE COUNTRY ACRES | TX1110059 | 570 | Groundwater |
| RANCH OAKS SUBDIVISION | TX2200291 | 561 | Groundwater |
| RIVER BEND ESTATES | TX0100042 | 552 | Groundwater |
| MOBILE HOME ESTATES | TX1010288 | 549 | Groundwater |
| LAKESIDE MUD 5 | TX2270446 | 546 | Purchased Surface Water |
| OLD CHISOLM ESTATES | TX2490036 | 546 | Groundwater |
| KINGS REST SUBDIVISION | TX2490032 | 534 | Groundwater |
| CENTER POINT TAYLOR SYSTEM | TX1330010 | 531 | Groundwater |
| OAK TERRACE ESTATES WATER SYSTEM | TX1870055 | 531 | Groundwater |
| TURTLE CREEK | TX1700287 | 522 | Groundwater |
| ENCHANTED RIVER ESTATES | TX0100039 | 513 | Groundwater |
| ROCK CREEK RESORT | TX0910147 | 513 | Groundwater |
| MEADOWLAND SUBDIVISION | TX0200347 | 510 | Groundwater |
| MALLARD POINTE SUBDIVISION | TX1110112 | 510 | Groundwater |
| SOUTH SAN GABRIEL RANCHES | TX2460026 | 510 | Groundwater |
| LAKES OF MISSION GROVE | TX0790423 | 507 | Groundwater |
| RANCHO BRAZOS SUBDIVISION | TX1110036 | 504 | Purchased Surface Water |
| CINNAMON RIDGE | TX0610209 | 501 | Groundwater |
| SIERRA WEST SUBDIVISION | TX1050134 | 495 | Groundwater |
| WHITE OAK RANCH SECTION ONE | TX1700670 | 495 | Groundwater |
| TRAVIS COUNTY MUD 10 | TX2270333 | 490 | Surface Water |
| STAGECOACH HILLS | TX0150096 | 489 | Groundwater |
| SUMMER LAKE RANCH | TX1013187 | 489 | Groundwater |
| REDWOOD ESTATES MOBILE HOME PARK | TX1010307 | 485 | Groundwater |
| SARATOGA ESTATES | TX0610163 | 483 | Groundwater |
| VILLAGE TRACE WATER SYSTEM | TX0200341 | 480 | Groundwater |
| PEEK ROAD UTILITIES | TX1011955 | 480 | Groundwater |
| SUNCHASE MEADOWS | TX1110087 | 480 | Groundwater |
| MARSHA WSC | TX2270040 | 480 | Purchased Surface Water |
| SOUTH MEADOWS WEST | TX0200413 | 477 | Groundwater |
| FALLING WATER SUBDIVISION | TX1330154 | 471 | Groundwater |
| SADDLE CLUB ESTATES | TX1840130 | 471 | Groundwater |
| THE COLONY MUD 1E | TX0110052 | 468 | Purchased Groundwater |
| SERENITY WOODS SUBDIVISION | TX1700483 | 468 | Groundwater |
| COUNTRY WOOD ESTATES | TX1160093 | 465 | Purchased Surface Water |
| GOVERNORS POINT | TX2040008 | 463 | Groundwater |
| HUNTINGTON ESTATES | TX1700324 | 462 | Groundwater |
| BOLING RANCH ESTATES | TX1840133 | 462 | Groundwater |
| ENCHANTED LAKES WATER SYSTEM | TX2120045 | 462 | Groundwater |
| BRENTWOOD SUBDIVISION | TX2350005 | 462 | Groundwater |
| WYNNWOOD HAVEN ESTATES | TX0610037 | 459 | Groundwater |
| PONDEROSA RANCH | TX0610233 | 456 | Groundwater |
| EASTWOOD VILLAGE | TX1110052 | 456 | Groundwater |
| RIDGECREST ADDITION & MISTY HOLLOW | TX1260035 | 456 | Purchased Surface Water |
| HILLS & DALES | TX1330030 | 456 | Groundwater |
| HOLIDAY SHORES | TX0200029 | 453 | Groundwater |
| ROCK HARBOR ESTATES | TX1110024 | 450 | Groundwater |
| HIGHLAND HILLS | TX2490057 | 450 | Groundwater |
| CYPRESS FIELDS SUBDIVISION | TX1011651 | 447 | Groundwater |
| AURORA VISTA | TX2490051 | 447 | Purchased Surface Water |
| CHAPARRAL WATER SYSTEM HAYS | TX1050029 | 444 | Groundwater |
| DANCING BEAR | TX1630045 | 444 | Groundwater |
| ROCKY POINT ESTATES | TX0910038 | 441 | Purchased Surface Water |
| FOREST LAKE SUBDIVISION | TX0920026 | 441 | Purchased Surface Water |
| INVERNESS POINT WATER SYSTEM | TX2270102 | 435 | Surface Water |
| MATAGORDA DUNES SUBDIVISION | TX1610052 | 429 | Groundwater |
| LINKWOOD ESTATES SUBDIVISION | TX2200061 | 426 | Groundwater |
| SANDY BEACH SUBDIVISION | TX1110026 | 423 | Groundwater |
| WESTCREEK ESTATES WATER SYSTEM | TX1330028 | 423 | Groundwater |
| AVONDALE HEIGHTS | TX2200184 | 423 | Groundwater |
| FOREST ACRES GARDENS | TX2200186 | 420 | Groundwater |
| BRAZOS RIVER ACRES | TX1110028 | 411 | Groundwater |
| NORTH FORK CREEK II | TX1110088 | 408 | Groundwater |
| SAGE BRUSH ESTATES | TX2490058 | 408 | Groundwater |
| COUNTRY CLUB GREENS | TX1013189 | 405 | Groundwater |
| BEAR PAW WATER SYSTEM | TX1330126 | 405 | Groundwater |
| SADDLEWOOD SUBDIVISION | TX1330155 | 402 | Groundwater |
| INDIGO RANCH | TX1700651 | 402 | Groundwater |
| OAKVIEW FARMS SUBDIVISION | TX1260010 | 399 | Groundwater |
| CAMILLA TWIN HARBOR | TX2040038 | 399 | Groundwater |
| NIGHTHAWK WSC | TX2270190 | 396 | Purchased Surface Water |
| MONTEGO BAY ESTATES | TX1110044 | 390 | Purchased Surface Water |
| CHINA SPRING RANCHES | TX0180082 | 381 | Groundwater |
| STONECREST ESTATES | TX0610059 | 381 | Groundwater |
| LCRA HARPER WATER SYSTEM | TX0860106 | 381 | Groundwater |
| ATASCOCITA ACRES SUBDIVISION | TX1011687 | 381 | Groundwater |
| HUNTINGTON ESTATES | TX1050124 | 378 | Groundwater |
| RIDGE UTILITIES | TX1110084 | 378 | Groundwater |
| RIVERCREST WATER | TX1550089 | 378 | Groundwater |
| WILLOW WOOD ADDITION MEADOW VISTA | TX0610212 | 375 | Groundwater |
| COYOTE RIDGE ADDITION | TX2490053 | 375 | Groundwater |
| BRUSHY CREEK UTILITY | TX1700601 | 369 | Groundwater |
| DECATUR ACRES WATER | TX2490030 | 369 | Groundwater |
| COLDSPRING TERRACE WATER SYSTEM | TX2040031 | 366 | Groundwater |
| FRF WATER SYSTEMS 1 3 4 5 6 7 8 | TX0490042 | 363 | Groundwater |
| DEERWOOD SUBDIVISION | TX0860098 | 357 | Groundwater |
| BASTROP COUNTY MUD 1 | TX0110049 | 354 | Purchased Groundwater |
| COUNTRY MEADOWS SUBDIVISION | TX1110089 | 354 | Groundwater |
| SHANGRI LA SUBDIVISION | TX1840021 | 351 | Groundwater |
| SAVANNA ESTATES | TX2200338 | 351 | Groundwater |
| LAKECLIFF ON LAKE TRAVIS | TX2270327 | 351 | Groundwater |
| PENINSULA ADDITION | TX1110115 | 348 | Groundwater |
| SONGBIRD ADDITION | TX0610165 | 342 | Groundwater |
| IMPERIAL VALLEY MHC | TX1013153 | 342 | Groundwater |
| LAKE UTILITY CO | TX1070059 | 342 | Groundwater |
| KENDALL POINTE | TX1300041 | 342 | Groundwater |
| INDIAN HILLS HARBOR | TX1580063 | 342 | Groundwater |
| SUMMIT SPRINGS | TX0270148 | 339 | Groundwater |
| LONG CREEK WATER | TX1110017 | 339 | Groundwater |
| WESTWOOD WATER SYSTEM | TX1330015 | 339 | Groundwater |
| CYPRESS SPRINGS | TX1330156 | 339 | Groundwater |
| WOODLAND RANCH | TX1700657 | 339 | Groundwater |
| COUNTRY CREEK ESTATES WATER SYSTEM | TX0200337 | 336 | Groundwater |
| SCENIC HEIGHTS | TX0460060 | 336 | Groundwater |
| STONE VALLEY FARM | TX0610236 | 336 | Groundwater |
| RIVER OAKS RANCH | TX1050099 | 336 | Groundwater |
| DEERHAVEN WCID | TX1500126 | 336 | Purchased Surface Water |
| HARPER ROAD ESTATES | TX0860005 | 333 | Groundwater |
| SANDY HARBOR SUBDIVISION | TX1500009 | 333 | Purchased Surface Water |
| NORTHWEST HILLS SUBDIVISION | TX1330124 | 330 | Groundwater |
| NORTH BOSQUE ESTATES WATER SUPPLY | TX1550129 | 330 | Groundwater |
| COUNTRY VIEW ESTATES | TX1630026 | 330 | Groundwater |
| DENTON CREEK ESTATES | TX0610015 | 327 | Groundwater |
| RIVER RUN SUBDIVISION | TX1110076 | 327 | Groundwater |
| LAS PLAYAS | TX0200067 | 321 | Groundwater |
| SOUTH MEADOWS EAST | TX0200415 | 321 | Groundwater |
| ORCHARD CROSSING SUBDIVISION | TX1012450 | 320 | Groundwater |
| BARROW SUBDIVISION | TX1160066 | 318 | Purchased Surface Water |
| SOUTHWEST TERRITORY | TX1050058 | 315 | Groundwater |
| ASHCREEK ADDITION | TX1840013 | 315 | Groundwater |
| PRAIRIE RIDGE ESTATES | TX2200348 | 315 | Groundwater |
| MADING LANE | TX1010517 | 312 | Groundwater |
| GARDEN OAKS | TX0940030 | 309 | Purchased Surface Water |
| MOUNTAIN CREST WATER | TX1050111 | 309 | Groundwater |
| NOLAN RIVER ESTATES | TX1260099 | 303 | Groundwater |
| CASCADE MOBILE HOME PARK | TX1300005 | 303 | Groundwater |
| COTTONWOOD HILLS ESTATES | TX2200045 | 303 | Groundwater |
| STONEGATE WATER SYSTEM | TX1300032 | 300 | Groundwater |
| CREEK WATER UTILITY | TX1580020 | 300 | Groundwater |
| AQUA VISTA UTILITIES | TX1330062 | 297 | Groundwater |
| CAMELOT FOREST WATER SYSTEM | TX1610058 | 297 | Groundwater |
| PALM CREST | TX0200617 | 294 | Groundwater |
| CEDAR BAYOU PARK | TX1010112 | 294 | Purchased Surface Water |
| KINBROOK ESTATES | TX1840094 | 294 | Groundwater |
| MORELAND SUBDIVISION | TX0200227 | 291 | Groundwater |
| ROLLING OAKS | TX1011861 | 291 | Groundwater |
| DAYTON CREEK WATER SYSTEM | TX1460141 | 291 | Groundwater |
| WILSHIRE SUBDIVISION | TX1700321 | 288 | Groundwater |
| REMUDA RANCH ESTATES | TX1840047 | 288 | Groundwater |
| BERNARD ACRES | TX0200065 | 285 | Groundwater |
| THE COLONY MUD 1D | TX0110056 | 276 | Purchased Groundwater |
| ESTATES UTILITY CO STONEGATE | TX0150431 | 276 | Groundwater |
| CYPRESS CREEK RANCH | TX1013296 | 276 | Purchased Groundwater |
| VILLAS OF WILLOWBROOK | TX1013599 | 276 | Purchased Surface Water |
| REATTA ESTATES | TX2490056 | 276 | Groundwater |
| CENTER POINT NORTH WATER SYSTEM | TX1330111 | 270 | Groundwater |
| SLAY ESTATES | TX2200072 | 270 | Groundwater |
| BEAR CREEK PARK | TX2270043 | 270 | Ground Water Under Influence |
| WAGON WHEEL ESTATES WATER SYSTEM | TX0200024 | 267 | Groundwater |
| LOLLIPOP WATER WORKS | TX1070039 | 267 | Groundwater |
| GRANBURY ACRES WATER SYSTEM | TX1110109 | 267 | Groundwater |
| WALDEN ESTATES | TX1260101 | 267 | Groundwater |
| HIGHLAND MEADOWS WATER SYSTEM | TX2490042 | 264 | Groundwater |
| CEDAR VALLEY SUBDIVISION | TX2040045 | 262 | Groundwater |
| HANBY ACRES | TX0610166 | 261 | Groundwater |
| LEANING TOWERING OAKS SUBDIVISION | TX1460145 | 261 | Groundwater |
| GREEN ACRES WATER SYSTEM | TX1840120 | 261 | Groundwater |
| MOODY WATER SYSTEM | TX0810038 | 258 | Groundwater |
| MARKS GLEN SUBDIVISION | TX1011510 | 258 | Groundwater |
| CRYSTAL SPRINGS SUBDIVISION | TX1700331 | 255 | Groundwater |
| OAK MEADOWS SUBDIVISION II AND III | TX1460100 | 252 | Groundwater |
| PINEY POINT SUBDIVISION | TX1700061 | 252 | Groundwater |
| ROLLING FOREST | TX1700684 | 252 | Groundwater |
| LIVE OAK HILLS ADDITION | TX1840012 | 249 | Groundwater |
| SQUAW CREEK SUBDIVISION WATER SYSTEM | TX2130021 | 249 | Groundwater |
| DOVE HOLLOW WATER SYSTEM | TX0610210 | 246 | Groundwater |
| HIDEAWAY BAY ESTATES | TX1110002 | 246 | Groundwater |
| CEDAR ESTATES SUBDIVISION | TX1460102 | 246 | Groundwater |
| BAMMEL OAKS ESTATES 2 | TX1010810 | 243 | Groundwater |
| RIVER COUNTRY ACRES | TX1110045 | 243 | Groundwater |
| RAYWOOD WATER SYSTEM | TX1460041 | 243 | Groundwater |
| BLUE MEDINA WATER | TX0100030 | 240 | Groundwater |
| NICKERSON FARM WATER SYSTEM | TX1330097 | 240 | Groundwater |
| DOGWOOD HILLS EAST | TX0010039 | 237 | Purchased Surface Water |
| SPRING HILL ESTATES | TX0610218 | 237 | Groundwater |
| FOREST WOODS SUBDIVISION | TX1700106 | 237 | Groundwater |
| WOODLANDS OF PARKER COUNTY & OLD BANK | TX1840138 | 234 | Groundwater |
| SOUTHWOOD ADDITION | TX2200108 | 234 | Groundwater |
| DOGWOOD HILLS NORTH | TX0010038 | 231 | Purchased Surface Water |
| HASTINGS HOMEOWNERS WATER SYSTEM | TX0200218 | 231 | Groundwater |
| HOLIDAY ESTATES WATER | TX1160028 | 231 | Purchased Surface Water |
| PINE VISTA MOBILE HOME VILLAGE | TX1700078 | 231 | Groundwater |
| HIGH VALLEY WSC | TX2270126 | 231 | Purchased Surface Water |
| PARKLAND ESTATES | TX1010192 | 228 | Groundwater |
| QUINLAN NORTH SUBDIVISION | TX1160063 | 228 | Purchased Surface Water |
| SUN VALLEY ESTATES WATER SUPPLY | TX2200337 | 228 | Groundwater |
| OAKWOOD ACRES | TX1700216 | 225 | Groundwater |
| DEER BUTTE SUBDIVISION | TX1840037 | 225 | Groundwater |
| SKY VIEW RANCH ESTATES | TX2490061 | 225 | Groundwater |
| TASFIELD | TX1011865 | 222 | Purchased Surface Water |
| WINDMILL TRAIL | TX2490050 | 222 | Groundwater |
| COMANCHE CLIFFS | TX0100065 | 219 | Groundwater |
| THE COLONY MUD 1C | TX0110055 | 219 | Purchased Groundwater |
| NORTHWEST HILLS WATER SUPPLY | TX0860086 | 219 | Groundwater |
| ALDINE MEADOWS | TX1010092 | 219 | Groundwater |
| GRANITE CREEK WSC | TX1050080 | 219 | Groundwater |
| GUN & ROD ESTATES | TX2390021 | 219 | Groundwater |
| SMITHWICK MILLS COMMUNITY | TX0270045 | 216 | Surface Water |
| CARDINAL VALLEY WATER | TX1050068 | 216 | Groundwater |
| NORTH COUNTY WATER SUPPLY | TX1550049 | 215 | Groundwater |
| WEST OAK HEIGHTS | TX0860100 | 213 | Groundwater |
| FALCON CREST ADDITION | TX1260076 | 213 | Groundwater |
| VERDE PARK ESTATES | TX1330027 | 213 | Groundwater |
| GLENWOOD MOBILE HOME SUBDIVISION | TX1011492 | 212 | Groundwater |
| PARK FOREST WATER SYSTEM | TX1013041 | 210 | Groundwater |
| ACTON WATER ROYAL OAKS | TX1110055 | 210 | Groundwater |
| CEDAR OAKS MOBILE HOME COMMUNITY | TX1011556 | 207 | Groundwater |
| GOLDEN ACRES WATER | TX1780019 | 207 | Purchased Surface Water |
| BAVARIAN HILLS | TX0150235 | 204 | Groundwater |
| LOS PINOS SUBDIVISION | TX1013733 | 204 | Groundwater |
| BOYNTON WATER | TX1110042 | 204 | Groundwater |
| DAYTON OAKS ESTATE | TX1460136 | 203 | Groundwater |
| ALLEYTON WATER SYSTEM | TX0450087 | 201 | Groundwater |
| COUNTRYSIDE MOBILE HOME ESTATES MHP | IL0915265 | 200 | Groundwater |
| WILLOW SPRINGS ADDITION | TX0610237 | 198 | Groundwater |
| WALRAVEN SUBDIVISION | TX1013195 | 198 | Groundwater |
| NORTH FORK CREEK | TX1110074 | 198 | Purchased Groundwater |
| STONEGATE WATER | TX2490037 | 198 | Groundwater |
| PLEASANT RIDGE ADDITION | TX0490041 | 195 | Groundwater |
| OAKVIEW WATER SYSTEM | TX0860107 | 195 | Groundwater |
| RANCHO VILLA SUBDIVISION | TX1260078 | 195 | Groundwater |
| SHADY OAKS MOBILE HOME PARK WATER SYSTEM | LA1005114 | 192 | Groundwater |
| SLEEPY HOLLOW | TX1330101 | 189 | Groundwater |
| TIDEWATER OAKS SUBDIVISION | TX1610033 | 189 | Groundwater |
| VALENTINE RANCH | TX1630040 | 189 | Groundwater |
| CS WATER | TX0180033 | 187 | Groundwater |
| CHEROKEE POINT WATER CO | TX0320015 | 186 | Groundwater |
| HIDDEN VALLEY WATER SYSTEM | TX0610099 | 186 | Groundwater |
| HIGH POINT WATER | TX1070233 | 186 | Groundwater |
| WILLIAM TRAILS | TX1700966 | 186 | Groundwater |
| SANDY ACRES ADDITION | TX1840098 | 186 | Groundwater |
| OAKWOOD VILLAGE MOBILE HOME SUBDIVISION | TX1011803 | 180 | Groundwater |
| NOLAN CREEK ESTATES | TX1110080 | 180 | Groundwater |
| LAKE CONROE WEST | TX1700041 | 180 | Groundwater |
| LAZY BEND ESTATES | TX1840018 | 180 | Groundwater |
| PINWAH PINES ESTATES | TX1870130 | 179 | Purchased Surface Water |
| HACKBERRY CREEK SUBDIVISION | TX0360100 | 176 | Groundwater |
| CENTER POINT | TX1330007 | 174 | Groundwater |
| TRINITY OAKS PRESERVE AT ROUND MOUNTAIN | TX0160041 | 171 | Groundwater |
| LAME DUCK WATER SYSTEM | TX0180072 | 171 | Groundwater |
| OAK BEND ESTATES | TX0200146 | 171 | Groundwater |
| BONANZA BEACH | TX0270018 | 171 | Groundwater |
| COTTONWOOD PARK WATER SYSTEM | TX1010283 | 171 | Groundwater |
| HUNTERS VILLAGE SUBDIVISION | TX1013159 | 171 | Groundwater |
| WESTVIEW ENTERPRISES | TX1840105 | 171 | Groundwater |
| TIMBERCREEK VALLEY | TX1840108 | 171 | Groundwater |
| SILVER CREEK ESTATES | TX2200277 | 171 | Groundwater |
| NIAGRA PUBLIC WATER SUPPLY | TX0790261 | 168 | Groundwater |
| GOODALL WATER SYSTEM | TX1550126 | 168 | Groundwater |
| WHISPER MEADOWS | TX1011708 | 165 | Groundwater |
| BLACK OAK WATER SYSTEM | TX1700851 | 165 | Groundwater |
| PYSSENS LIVE OAK ESTATES SUBDIVISION | TX2410010 | 165 | Groundwater |
| UT MCDONALD OBSERVATORY | TX1220003 | 163 | Groundwater |
| ATHENS WATER SYSTEM COOP | TX1070235 | 162 | Groundwater |
| OAK WOODS WATER SYSTEM | TX1700454 | 162 | Groundwater |
| INDIAN SPRINGS SUBDIVISION | TX2270210 | 159 | Purchased Surface Water |
| SUNSET ACRES SUBDIVISION | TX1110077 | 156 | Groundwater |
| MARKUM RANCH ESTATES | TX2200281 | 156 | Groundwater |
| MOORELAND SUBDIVISION | TX2270114 | 156 | Ground Water Under Influence |
| LONGHORN VALLEY | TX1870152 | 155 | Groundwater |
| WEST MAGNOLIA FOREST | TX0930042 | 153 | Groundwater |
| WESTGATE SUBDIVISION | TX1010622 | 153 | Groundwater |
| MCGEE PLACE | TX1012995 | 153 | Groundwater |
| STETNER ADDITION | TX1010216 | 150 | Groundwater |
| SHADY HILLS ESTATES WATER SYSTEM | TX1260071 | 150 | Groundwater |
| PARK PLACE SUBDIVISION | TX1330127 | 150 | Groundwater |
| PONDEROSA ADDITION UTILITIES | TX0610175 | 147 | Groundwater |
| CYPRESS PLACE | TX1010254 | 147 | Groundwater |
| MEADOWVIEW SUBDIVISION | TX0200189 | 144 | Groundwater |
| BERRY HILL ESTATES | TX1011860 | 144 | Groundwater |
| COPPER HILLS WATER SYSTEM | TX1050082 | 141 | Groundwater |
| MIDHAVEN ESTATES | TX1110094 | 141 | Groundwater |
| QUINLAN SOUTH SUBDIVISION | TX1160064 | 141 | Purchased Surface Water |
| PEACEFUL MEADOWS SUBDIVISION | TX1260067 | 141 | Groundwater |
| PECAN VALLEY | TX1330107 | 141 | Groundwater |
| HERITAGE ESTATES | TX0910139 | 138 | Groundwater |
| ALDINE FOREST | TX1010410 | 138 | Groundwater |
| DAL HIGH WATER SYSTEM | TX1070159 | 138 | Groundwater |
| CEDAR SPRINGS MHP | TX1330019 | 138 | Groundwater |
| ROCKY CREEK SUBDIVISION WATER SYSTEM | TX1630038 | 138 | Groundwater |
| NORTH RIDGE ESTATES | TX2200326 | 138 | Groundwater |
| YOUNGS COMMUNITY LLC. WATER SYSTEM | LA1055123 | 135 | Groundwater |
| WINDSONG SUBDIVISION | TX0200229 | 135 | Groundwater |
| CATTAIL CREEK MHP | TX0720033 | 135 | Groundwater |
| PETERSON PLACE SUBDIVISION WATER SYSTEM | TX1460086 | 135 | Groundwater |
| LAGO LINDO ESTATES | TX1840038 | 135 | Groundwater |
| HAWK RIDGE | TX2490077 | 135 | Groundwater |
| CRICKETT HILL ESTATES | TX1010947 | 132 | Groundwater |
| OAK MANOR | TX1011633 | 132 | Groundwater |
| MAYWOOD ACRES | TX1460033 | 132 | Groundwater |
| MEDINA HIGHLANDS | TX0100041 | 129 | Groundwater |
| ELMWOOD ESTATES | TX0100053 | 129 | Groundwater |
| GREENBRIAR ESTATES | TX0360111 | 129 | Groundwater |
| PONDER ACRES WATER SYSTEM | TX0610201 | 129 | Groundwater |
| WESTERN TRAILS SUBDIVISION | TX1010230 | 129 | Groundwater |
| MOORE ESTATES | TX1110102 | 129 | Groundwater |
| OAK RIDGE ESTATES WATER SYSTEM | TX1330134 | 129 | Groundwater |
| SOUTHERN OAKS WATER SYSTEM | TX1460150 | 129 | Groundwater |
| SAIL HAVEN | TX2270144 | 129 | Surface Water |
| SINGING MEADOWS SUBDIVISION | TX2490031 | 129 | Groundwater |
| TIMBER CREEK ADDITION | TX0490030 | 126 | Groundwater |
| TEN WEST RANCHES | TX1300036 | 126 | Groundwater |
| PALMETTO SUBDIVISION | TX0200242 | 123 | Groundwater |
| SPRING CREEK FOREST | TX1010334 | 123 | Groundwater |
| STRAWBERRY ESTATES | TX2490045 | 123 | Groundwater |
| THUNDERBIRD TERRACE MHP | OH7605512 | 122 | Groundwater |
| WEST BASTROP VILLAGE MUD | TX0110064 | 120 | GUP |
| WEYBRIDGE SUBDIVISION WATER SYSTEM | TX0200019 | 120 | Groundwater |
| RADIANCE WSC | TX1050075 | 120 | Groundwater |
| ROYAL OAKS WATER SYSTEM | TX1330013 | 120 | Groundwater |
| QUAIL MEADOWS SUBDIVISION | TX0200219 | 117 | Groundwater |
| QUAIL CREEK SUBDIVISION | TX0270078 | 117 | Groundwater |
| PLATTEN CREEK WATER SYSTEM | TX1300035 | 117 | Groundwater |
| WOODLAND HILLS | TX0610084 | 114 | Groundwater |
| ROCKWALL EAST MINI RANCH | TX1160011 | 114 | Purchased Surface Water |
| HILLTOP MOBILE HOME PARK | TX2200107 | 114 | Groundwater |
| MIRALOMAS MUD | TX1300060 | 113 | Purchased Surface Water |
| SPANISH OAKS ADDITION | TX0610214 | 111 | Groundwater |
| SHADOW GROVE ESTATES | TX0790389 | 111 | Groundwater |
| ARCADIA COURT COMMUNITY ASSOCIATION | TX1013803 | 111 | Purchased Groundwater |
| HORSESHOE OAKS SUBDIVISION WATER SYSTEM | TX1330118 | 111 | Groundwater |
| ORCHARDS ON THE BRAZOS | TX2130046 | 111 | Groundwater |
| BLUE MOUND ESTATES | TX2200100 | 111 | Groundwater |
| CANYON RIDGE SPRINGS | TX2270342 | 111 | Groundwater |
| CANE VIEW MOBILE HOME VILLAGE | LA1097031 | 108 | Groundwater |
| BOUDREAUX GARDENS | TX1011084 | 108 | Groundwater |
| BRIARWOOD HARBOR | TX1070220 | 108 | Groundwater |
| FLAT ROCK ESTATES | TX1840035 | 108 | Groundwater |
| LAZY ACRES TRAILER PARK | TX0150186 | 105 | Groundwater |
| SUNCHASE SUBDIVISION | TX1230083 | 105 | Groundwater |
| COUNTRY WOOD WATER SYSTEM | TX1870138 | 104 | Groundwater |
| NORTH WOODS ESTATES | TX1010915 | 102 | Groundwater |
| WEST MEADOW SUBDIVISION | TX1260063 | 102 | Groundwater |
| SMITH WATER | TX1550091 | 102 | Groundwater |
| SHARONDALE SUBDIVISION | TX0200258 | 99 | Groundwater |
| KITZWOOD SUBDIVISION | TX1011536 | 99 | Groundwater |
| SPANISH PARK SUBDIVISION | TX1840026 | 99 | Groundwater |
| WWWW WATER SYSTEM | TX2120077 | 99 | Purchased Groundwater |
| TRINITY COVE SUBDIVISION | TX0360084 | 96 | Groundwater |
| CARRIAGE TRAIL SUBDIVISION | TX0360093 | 96 | Groundwater |
| WOODHAVEN MOBILE HOME PARK | TX1330024 | 96 | Groundwater |
| CENTENNIAL PLACE | TX0200190 | 93 | Groundwater |
| STERLING ESTATES | TX0200363 | 93 | Groundwater |
| LONDON WATER SYSTEM | TX1340019 | 93 | Groundwater |
| TOW WATER SYSTEM | TX1500011 | 93 | Groundwater |
| LA JUNTA | TX1840016 | 93 | Groundwater |
| WINDSOR ESTATES | TX1840076 | 93 | Groundwater |
| HERITAGE OAKS ADDITION | TX2200090 | 93 | Groundwater |
| GARDEN ACRES SUBDIVISION WATER SYSTEM | TX1870160 | 91 | Groundwater |
| MEADOWLARK SUBDIVISION | TX0200271 | 90 | Groundwater |
| CYPRESS HILL SUBDIVISION | TX1011792 | 90 | Groundwater |
| CHESSWOOD WATER SYSTEM | TX1870088 | 90 | Groundwater |
| HERITAGE PARK WATER SERVICE | TX1330080 | 87 | Groundwater |
| EAGLES NEST | TX2200185 | 87 | Groundwater |
| WESTWOOD SUBDIVISION | TX0200254 | 81 | Groundwater |
| HOMESTEAD OAKS MOBILE HOME COMM | TX1011734 | 81 | Groundwater |
| TRIPLE H ESTATES | TX1260116 | 81 | Groundwater |
| REAL OAKS SUBDIVISION | TX1330139 | 81 | Groundwater |
| KILLOUGH ADDITION | TX2490013 | 81 | Groundwater |
| WEST PARK VILLAGE | TX1260077 | 78 | Groundwater |
| GARDEN ACRES | TX1260092 | 78 | Groundwater |
| OAK HOLLOW SUBDIVISION | TX1610031 | 78 | Groundwater |
| PHILLIPS ACRES | TX1870146 | 78 | Groundwater |
| GREENFIELDS ON SQUAW CREEK | TX2130036 | 78 | Groundwater |
| GRUENE RIVER DEVELOPMENT | TX0460185 | 75 | Groundwater |
| SPRINGTOWN SUBDIVISION | TX1840015 | 75 | Groundwater |
| SHEPHERD HILLS ESTATES | TX2040061 | 75 | Groundwater |
| SAN JULIAN CREEK ESTATES | TX0100052 | 72 | Groundwater |
| CALICO FARMS SUBDIVISION | TX0200152 | 72 | Groundwater |
| CHERRY RIDGE WATER | TX1330147 | 72 | Groundwater |
| BEHRINGER WATER SYSTEM | TX1550130 | 72 | Groundwater |
| WELLBORN ACRES | TX0200211 | 69 | Groundwater |
| SOUTH DAYTON OAKS | TX1460115 | 69 | Groundwater |
| ENCHANTED FOREST | TX1700040 | 69 | Groundwater |
| OAK RIDGE ESTATES | TX1160079 | 63 | Purchased Surface Water |
| WINDWOOD OAKS WATER SYSTEM | TX1330141 | 63 | Groundwater |
| AGNES SUBDIVISION | TX1840017 | 63 | Groundwater |
| SANDY RIDGE SUBDIVISION | TX0200255 | 60 | Groundwater |
| STONE MOUNTAIN SUBDIVISION | TX0270134 | 60 | Groundwater |
| AZALEA ESTATES MOBILE HOME COMMUN | TX1011253 | 60 | Groundwater |
| CEDAR BAYOU ESTATES | TX1012174 | 60 | Groundwater |
| JP AND LP RENTALS | TX1050180 | 60 | Groundwater |
| LAIRD ESTATES | TX1700015 | 60 | Groundwater |
| FRIO CANON WATER | TX1930023 | 60 | Groundwater |
| SILVER SADDLE ACRES | TX2200299 | 60 | Groundwater |
| TUBBS WATER SYSTEM | TX1550125 | 57 | Groundwater |
| FLORA 6 | TX0200153 | 54 | Groundwater |
| OLD STONY ESTATES | TX0610224 | 54 | Groundwater |
| AIRPORT HEIGHTS | TX1700006 | 54 | Groundwater |
| ROLLAN HEIGHTS SUBDIVISION | TX1010640 | 53 | Groundwater |
| FOREST OAKS VILLAGE | TX2270271 | 50 | Groundwater |
| VISTA HILLS | TX1330169 | 48 | Groundwater |
| ELGIN MUNICIPAL UTILITY DISTRICT 2 | TX0110066 | 45 | Purchased Groundwater |
| FLORA 7 | TX0200151 | 45 | Groundwater |
| TEX RIDES SUBDIVISION | TX1260037 | 45 | Groundwater |
| WEBB WAY SUBDIVISION | TX1460137 | 45 | Groundwater |
| RADECKE ROAD WATER SYSTEM | TX0610234 | 42 | Groundwater |
| BERGVILLE ADDITION | TX1010099 | 42 | Groundwater |
| DORSETT PLACE | TX1010122 | 42 | Groundwater |
| SIGNAL HILL WATER SYSTEM 24 | TX1050035 | 42 | Groundwater |
| BENBROOK HILLS | TX2200313 | 42 | Groundwater |
| WOOD ISLAND HOMEOWNERS ASSOCIATION WATER | TX2270213 | 42 | Groundwater |
| BAMMEL OAKS ESTATES 1 | TX1010809 | 36 | Purchased Groundwater |
| GATEWAY ESTATES III | TX1050116 | 36 | Groundwater |
| PROCHNOW COUNTRY HOMES | TX1050191 | 30 | Groundwater |
| SOUTHERN ACRES WATER SYSTEM | TX1260094 | 30 | Purchased Surface Water |
| METRO WATER SYSTEMS | TX0830037 | — | Groundwater |
| WILBARGER CREEK MUD 2 | TX2270375 | — | Purchased Groundwater |
Water bodies near Austin
Bull Ck At Loop 360 Nr Austin · river Lcra Lk Austin At Austin · lake Barton Ck At Lost Ck Blvd Nr Austin · river Barton Ck At Loop 360, Austin · river Barton Ck Abv Barton Spgs At Austin · river
As a surface-water system, these water bodies may directly influence Austin's drinking water supply.
05Pressure on Austin's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
5 facilities within 10 miles reported 16 lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
TESLA GIGA TEXAS — manganese 15 lb · 9.6 mi
FLEXTRONICS AMERICA L.L.C. — copper 1 lb · 9.1 mi
FORTERRA PIPE & PRECAST - AUSTIN 0 lb · 4.7 mi
+ 2 more facilities
Flood & storm history
10 federal disaster declarations on record for Travis County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING Jul 2025 · DR-4879
SEVERE STORMS, STRAIGHT-LINE WINDS, AND FLOODING Jul 2025 · DR-4879
TROPICAL STORMS MARCO AND LAURA Aug 2020 · DR-3540
Drought
Anderson County is in D1 (moderate drought) per the U.S. Drought Monitor (week of Jul 2026). Drought can raise disinfection-byproduct levels and taste/odor issues as utilities draw from lower reservoirs.
Weeks at D2+ in the last 5 years20 wks
Months in D2+ over the last 30 years16.3%
06How Austin compares
Scores for nearby Texas cities on one line, with the average marked.
Austin (this city)
31.2 · F
dashed line = Texas average (47/100)
Austin scores 31.2/100 — below the Texas average of 47/100. It outscores 1 of 10 nearby cities. Full Texas rankings →
FHouston, TX
27.8 / 100FSan Antonio, TX
33.1 / 100FDallas, TX
36.2 / 100FFort Worth, TX
34.5 / 100FEl Paso, TX
35.8 / 100DArlington, TX
50.5 / 100
Travis water quality rankings27.8 / 100FSan Antonio, TX
33.1 / 100FDallas, TX
36.2 / 100FFort Worth, TX
34.5 / 100FEl Paso, TX
35.8 / 100DArlington, TX
50.5 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Austin's water — not generic advice.
Because of pfas
Filter drinking & cooking water
Reverse osmosis system. PFAS compounds exceed EPA maximum contaminant levels
Compare tested filters → Know your report
Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR → Stay informed
Watch for Austin alerts
This area has a history of flood declarations — after severe weather, watch for boil-water advisories from the utility, and check the live alerts on this page.
All water alerts →FAQ
Frequently asked questions
Is Austin, TX tap water safe to drink?
Austin's water quality earned a grade of F (31.2/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #1061 out of 1067 cities tested in Texas.
What contaminants are in Austin's water?
Lead was measured at 0.0 ppb (90th percentile). 10 PFAS compounds were detected. 9527 violations are on record.
How is Austin's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Austin?
PFAS compounds exceed EPA limits — a reverse osmosis or activated carbon filter is recommended.
Where does Austin's water come from?
Austin's water is sourced from Surface water. The city has 621 water systems serving approximately 1,789,562 residents.
What health violations has Austin's water system had?
Austin has 1288 health-based violations on record. The most recent violation was recorded in December 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 2515 violations remain unresolved.
Why does Austin have so many PFAS compounds in its water?
10 different PFAS "forever chemical" compounds were detected in Austin's water supply during UCMR 5 testing. PFAS contamination often originates from proximity to military installations (AFFF firefighting foam), airports, industrial manufacturing sites, or wastewater treatment facilities. Some levels exceed the 2024 EPA maximum contaminant levels — a reverse osmosis or NSF-certified activated carbon filter is strongly recommended.
How does Austin's water compare to other cities?
Austin ranks #1061 out of 1067 cities in Texas (better than 1% of state cities) and #15296 out of 15382 cities nationally (1th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Copper Contaminant Profile EPA action levels, health effects, and copper removal options. Read the guide → PFAS Contaminant Profile Detailed profile on PFAS contamination in US water systems. Read the guide → PFAS Forever Chemicals Explained Learn what PFAS are, how they get into water, and what filtration removes them. Read the guide →