Is Cypress, TX Tap Water Safe to Drink?
Graded F — but Copper and Chlorate were detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
34.3/100
waterverge.com Cypress, TX — Water Quality Report
Cypress's drinking water received a grade of F (34.3 out of 100), indicating failing water quality. The city's 144 water systems serve approximately 75,711 residents using groundwater.
Lead levels were measured at 0.0 ppb (90th percentile), well within EPA limits. UCMR 5 testing detected 9 PFAS compounds, with levels exceeding EPA maximum contaminant levels in the water supply.
The system has 4147 violations on record, including 624 health-based violations. 1240 remain unresolved.
What to know about Cypress's water
Cypress ranks #1052 out of 1067 cities in Texas for water quality, placing it among the lowest-rated in the state.
Cypress relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
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.
Haloacetic acid (HAA5) levels were elevated at 35.5 µg/L in UCMR 4 testing, though below the 60 µg/L EPA limit. Activated carbon filtration can help reduce these disinfection byproducts.
Hexavalent chromium (chromium-6) was detected at 1.33 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.
The system has seen 822 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Cypress, TX water safe to drink?
Cypress's drinking water has significant quality concerns based on EPA testing data. With a grade of F (34.3/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 144 water systems serve approximately 75,711 residents using groundwater (wells).
Recent water quality updates for Cypress
A timeline of significant water quality events, violations, and data updates.
PFAS levels exceed EPA maximum contaminant levels. Reverse osmosis or activated carbon filtration recommended.
Latest EPA compliance and testing data incorporated into Cypress's water quality assessment. Grade: F (34.3/100).
Contaminants: Lead and Copper Rule, Public Notice.
Contaminants: Public Notice.
6 health-based. Contaminants: Public Notice, TTHM, Arsenic.
Federal disaster declaration (FEMA DR-4798). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Cypress's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
PFAS "forever chemicals" exceed EPA maximum contaminant levels. Reverse osmosis or granular activated carbon filtration strongly recommended.
PFAS "forever chemicals" detected
UCMR 5 testing found 9 PFAS compounds in Cypress's water supply. PFAS are synthetic chemicals that persist indefinitely in the environment and the human body.
Violation history
Cypress's water system has 4,147 total violations on record, including 624 health-based violations. 1,240 remain unresolved. 822 violations were issued in the last 5 years.
Flood & environmental risk
Harris County has experienced 10 federally declared disasters since 2016. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies. Local water sources include Cypress Ck At Sharp Rd Nr Hockley, Cypress Ck At Katy-Hockley Rd Nr Hockley, Cypress Ck At House-Hahl Rd Nr Cypress, Little Cypress Ck Nr Cypress, Cypress Ck At Grant Rd Nr Cypress.
Where does Cypress's water come from?
Cypress's drinking water comes from groundwater (wells), supplied by 144 water systems serving approximately 75,711 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Cypress Ck At Sharp Rd Nr Hockley (river), Cypress Ck At Katy-Hockley Rd Nr Hockley (river), Cypress Ck At House-Hahl Rd Nr Cypress (river), Little Cypress Ck Nr Cypress (river), Cypress Ck At Grant Rd Nr Cypress (river).
What Cypress residents can do
Recommended: Reverse osmosis system. This addresses the specific contaminants found in Cypress's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Cypress's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Forever chemicals overview
National PFAS report →Violation summary
Violations & advisories
Drought conditions
D2 — severe droughtBrazoria County is currently in D2 (severe drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Flood & disaster history
Harris County has experienced 10 federally declared disasters since 2016. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Cypress's water supply, we recommend the following filter types.
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. | 2.22 | 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. | 0.051 | 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. | 52.500 | 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. | 0.008 | 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. | 0.005 | 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. | 0.005 | 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. | ND | HI | µg/L | PFAS | Not 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. | 0.005 | 0.004 | µg/L | PFAS | Over MCL |
| 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. | 0.005 | 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. | 0.014 | HI | µg/L | PFAS | Detected |
| PFPeS | ND | HI | µg/L | PFAS | Not 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 |
Lead level trend (90th percentile)
Copper level trend (90th percentile)
See how Cypress compares by contaminant
Explore where Cypress ranks among all Texas cities for specific contaminants.
Water source & infrastructure
Where Cypress's water comes from
Cypress's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by local government ownership and serves approximately 75,711 people through 144 water systems.
Water bodies near Cypress
Cypress is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Cypress
| System Name | PWSID | Population | Source |
|---|---|---|---|
| FAULKEY GULLY MUD | TX1011602 | 8,193 | GW |
| GBRA CALHOUN COUNTY RURAL WATER SYSTEM | TX0290007 | 4,482 | SWP |
| CRYSTAL SYSTEMS | TX2120015 | 3,879 | GW |
| RIVER PLANTATION MUD | TX1700028 | 2,898 | GW |
| BLUE BELL MANOR SUBDIVISION | TX1010647 | 2,607 | GW |
| HAZY HOLLOW EAST ESTATES | TX1700013 | 2,424 | GW |
| HARRIS COUNTY MUD 58 | TX1011704 | 2,289 | GW |
| NITSCH & SON UTILITY | TX1010145 | 2,190 | GW |
| HILLTOWN ADDITION | TX0610112 | 2,184 | GW |
| HARRIS COUNTY MUD 248 | TX1013306 | 2,076 | GWP |
| BEAUMONT PLACE | TX1010098 | 1,917 | GW |
| COLES CROSSING | TX0360114 | 1,521 | GW |
| SOUTHWOOD ESTATES | TX0200403 | 1,347 | GW |
| CONROE RESORT | TX1700416 | 1,068 | GW |
| MOUNT SYLVAN WATER SYSTEM | TX2120034 | 1,056 | GW |
| CASTLEWOOD SUBDIVISION | TX1010111 | 1,053 | GW |
| WILDWOOD SHORES | TX2360078 | 968 | GW |
| MEADOWLAKE ESTATES | TX1010287 | 966 | GW |
| MAPLE LEAF MOBILE HOME SUBDIVISION | TX1011493 | 861 | GW |
| CYPRESS BEND SUBDIVISION | TX1010119 | 819 | GW |
| SPRING FOREST SUBDIVISION | TX1700033 | 759 | GW |
| WHITE OAK VALLEY ESTATES | TX1700036 | 750 | GW |
| RESERVOIR ACRES SUBDIVISION | TX1010197 | 738 | GW |
| OAK SHORES WATER SYSTEM | TX2270060 | 696 | SW |
| SPRING CREEK VALLEY ESTATES | TX1010213 | 645 | GW |
| WOODLAND ACRES SUBDIVISION | TX0360027 | 643 | GW |
| LAKEVIEW N MARSHALL OAKS SOMMERVILLE PLA | TX0260010 | 642 | GW |
| ROSEWOOD WATER SYSTEM | TX2300026 | 639 | GW |
| HIGHLAND RIDGE SUBDIVISION | TX1010157 | 591 | GW |
| RIVERWOOD ESTATES | TX1460146 | 585 | GW |
| URBAN ACRES SUBDIVISION | TX1010252 | 570 | GW |
| BENCHLEY OAKS SUBDIVISION | TX0210039 | 567 | GW |
| GRASSLANDS | TX0200360 | 516 | GW |
| FOREST SPRINGS WATER SYSTEM | TX1870059 | 510 | GW |
| GARDEN VALLEY RESORT | TX2120081 | 510 | GW |
| SPRING CREEK PURE UTILITIES | TX1870149 | 498 | GW |
| SPRINGMONT SUBDIVISION | TX1010255 | 495 | GW |
| HUFFMAN HEIGHTS SUBDIVISION | TX1010700 | 435 | GW |
| PORTER TERRACE | TX1700161 | 417 | GW |
| TAYLOR LAKE ESTATES WATER SYSTEM | TX1870064 | 416 | GW |
| BEECHWOOD SUBDIVISION | TX0200245 | 411 | GW |
| STALLION LAKE RANCH | TX2120104 | 399 | GW |
| PALOMA ACRES SUBDIVISION | TX0200597 | 390 | GW |
| BRAZOS OAKS SUBDIVISION | TX0200639 | 390 | GW |
| TOWER OAK BEND WSC | TX1011981 | 390 | GW |
| PIONEER TRAILS SUBDIVISION | TX1700114 | 384 | GW |
| EAST PONDER ESTATES | TX0610161 | 363 | GW |
| ROSHARON TOWNSHIP | TX0200036 | 354 | GW |
| BROOKSHIRES CAMP JOY WATER SYSTEM | TX2300015 | 348 | GW |
| HEATHERGATE ESTATES | TX1011302 | 342 | GW |
| DEMI JOHN PLACE WATER SYSTEM | TX0200185 | 336 | GW |
| CROWLEY II ACRE SUBDIVISION | TX1260012 | 336 | GW |
| MARK V ESTATES | TX0200432 | 330 | GW |
| FRIENDSHIP WATER SYSTEM | TX2300020 | 330 | GW |
| COMMODORE CAPE WATER SYSTEM | TX1870026 | 321 | GW |
| GREENGATE ACRES SUBDIVISION | TX1010132 | 318 | GW |
| FOREST MANOR SUBDIVISION | TX1010264 | 300 | GW |
| BUFFALO CREEK | TX1260084 | 300 | GW |
| RIVERSIDE ESTATES | TX0200058 | 297 | GW |
| TEJAS LAKES SUBDIVISION | TX0790504 | 297 | GW |
| BERNARD OAKS SUBDIVISION | TX0200338 | 294 | GW |
| LAKESIDE VILLAGE SUBDIVISION | TX1870095 | 290 | GW |
| TEJAS LANDING SUBDIVISION | TX0790656 | 288 | GW |
| RIVER CLUB WATER | TX1700185 | 273 | GW |
| ENCHANTED VALLEY ESTATES WSC | TX1010978 | 270 | GW |
| RIVER RANCH | TX0790425 | 267 | GW |
| GARDEN ACRES SUBDIVISION | TX0920031 | 252 | GW |
| PEACH CREEK OAKS SUBDIVISION | TX1700051 | 250 | GW |
| LOCH NESS COVE SUBDIVISION WATER SYSTEM | TX1700148 | 246 | GW |
| WILCO WATER | TX0200083 | 243 | GW |
| APACHE HILLS | TX0260019 | 243 | GW |
| SANDY MEADOW ESTATES SUBDIVISION | TX0200335 | 237 | GW |
| BAYRIDGE SUBDIVISION WATER SYSTEM | TX0360028 | 234 | GW |
| WHITE TAIL RIDGE LAKES ESTATES | TX2290012 | 233 | GW |
| JOY VILLAGE | TX1700021 | 231 | GW |
| COLONY TRAILS SUBDIVISION | TX0200604 | 228 | GW |
| CAPE TRANQUILITY SYSTEM | TX1070176 | 225 | GW |
| ROSHARON ROAD ESTATES SUBDIVISION | TX0200346 | 219 | GW |
| LOST LAKES | TX0360108 | 217 | GW |
| TEXAS WATER SUPPLY | TX1870131 | 213 | GW |
| SAN BERNARD RIVER ESTATES | TX0200460 | 207 | GW |
| LAKEWOOD ESTATES | TX0210042 | 202 | GW |
| MOORELAND SUBDIVISION WATER SYSTEM | TX0200094 | 201 | GW |
| SIX LAKES SUBDIVISION | TX1460015 | 195 | GW |
| LAKEWOOD COLONY | TX1700029 | 195 | GW |
| LITTLE OAK FOREST SUBDIVISION | TX0260037 | 189 | GW |
| SHADY BROOK ACRES | TX1700031 | 189 | GW |
| ALLENDALE WATER SYSTEM | TX1700187 | 180 | GW |
| OAK MEADOWS ESTATES SUBDIVISION | TX0200566 | 174 | GW |
| COLONY COVE SUBDIVISION WATER SYSTEM | TX0200324 | 171 | GW |
| OAKS AT HOUSTON POINT | TX0360126 | 165 | GW |
| WOODHAVEN ESTATES | TX1700481 | 165 | GW |
| OAK FOREST LAKEWAY MANOR | TX1980017 | 162 | GW |
| JOHN DAME | TX1260090 | 159 | GW |
| TALL CEDARS MOBILE HOME SUBDIVISION | TX1010219 | 156 | GW |
| ANGLE ACRES WATER SYSTEM | TX0200244 | 153 | GW |
| KUCERA FARMS SUBDIVISION | TX0200665 | 150 | GW |
| SMETANA FOREST | TX0210010 | 150 | GW |
| OAKLAND VILLAGE MOBILE HOME COMMUNITY | TX1011049 | 150 | GW |
| WAYNEWOOD PLACE CIVIC CLUB | TX1011186 | 147 | GW |
| COUNTRY MEADOWS | TX0200273 | 141 | GW |
| CORONADO COUNTRY | TX0200275 | 141 | GW |
| CRYSTAL LAKE ESTATES | TX0790510 | 138 | GW |
| HILLGREEN SUBDIVISION WATER CO | TX1700539 | 138 | GW |
| SNUG HARBOR SUBDIVISION | TX0200053 | 135 | GW |
| COUNTRY ACRE ESTATES | TX0200274 | 132 | GW |
| ROCK CREEK ESTATES | TX1260082 | 132 | GW |
| STONE HEDGE ESTATES | TX1700102 | 129 | GW |
| SPANISH BIT PLANTATION SUBDIVISION | TX1610102 | 126 | GW |
| BAYOU COLONY SUBDIVISION | TX0200358 | 120 | GW |
| CYPRESS VILLAGE TRAILER & RV PARK | TX1010603 | 120 | GW |
| RIVERBOAT BEND TRAILER PARK | TX1460088 | 120 | GW |
| TANGLEWOOD FOREST SUBDIVISION | TX2040054 | 118 | GW |
| BLUE SAGE GARDENS SUBDIVISION | TX0200323 | 117 | GW |
| STONERIDGE LAKE SUBDIVISION | TX0200624 | 117 | GW |
| BAR D RANCHETTES | TX1460076 | 117 | GW |
| WOLF GLEN WATER SYSTEM | TX0200370 | 108 | GW |
| BRIAR MEADOWS | TX0200410 | 108 | GW |
| BEAR CREEK ESTATES | TX2200336 | 99 | GW |
| COLUMBUS OAKS APARTMENTS | TX0450049 | 96 | GW |
| HIGHLAND MOBILE HOME SUBDIVISION | TX1010285 | 96 | GW |
| COUNTRY CLUB ESTATES | TX2300021 | 96 | GW |
| BRANDI ESTATES | TX0200325 | 93 | GW |
| BELL MANOR SUBDIVISION | TX1260080 | 87 | GW |
| SWEETGUM FOREST | TX1700113 | 87 | GW |
| BENTWOOD BEND WATER SYSTEM | TX1870154 | 87 | GW |
| MARTIN CREEK ESTATES | TX1260122 | 84 | GW |
| CORNERSTONE MOBILE HOME COMMUNITY | TX1013193 | 81 | GW |
| LEE RIDGE SUBDIVISION | TX0200506 | 78 | GW |
| GRANTWOODS WATER SUPPLY CORPORATION | TX1010130 | 78 | GW |
| WOOD ACRES MHP | TX1700426 | 78 | GW |
| HOLIDAY HARBOR SUBDIVISION | TX1610022 | 75 | GW |
| LAZY ACRES MOBILE HOME PARK | TX1013249 | 72 | GW |
| RYAN LONG SUBDIVISION 2 WATER SYSTEM | TX0200108 | 57 | GW |
| THE HOUSTON OAKS GOLF AND COUNTRY CLUB | TX2370030 | 54 | GW |
| WHISPERING WOODS | TX0260032 | 51 | GW |
| DOGWOOD TREE WATER SYSTEM | TX1010927 | 48 | GW |
| QUAILWOOD WATER SYSTEM | TX1011475 | 48 | GWP |
| MONTGOMERY COUNTY MUD 212 | TX1700967 | 45 | GWP |
| BARLOW LAKE ESTATES | TX2290015 | 41 | GW |
| TOWN BLUFF WATER SYSTEM | TX2290043 | 34 | GW |
| WILLOWBREEZE FARM SUBDIVISION | TX0200744 | 20 | GW |
| GUADALUPE BLANCO RIVER AUTHORITY | TX0290005 | — | SW |
| THE HIGHLANDS | TX1700909 | — | GW |
How Cypress compares
Full Texas rankings →Cypress's score of 34.3/100 is below the average of 46/100 among major Texas cities. It outscores 3 of 10 nearby cities. 7 of 10 nearby cities score higher.
Nearby cities
View Texas rankings →Learn more about your water
Guides and resources related to Cypress's water quality findings.
Explore water quality across Harris
Frequently asked questions
Is Cypress, TX tap water safe to drink?
Cypress's water quality earned a grade of F (34.3/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #1052 out of 1067 cities tested in Texas.
What contaminants are in Cypress's water?
Lead was measured at 0.0 ppb (90th percentile). 9 PFAS compounds were detected. 4147 violations are on record.
How is Cypress'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 Cypress?
PFAS compounds exceed EPA limits — a reverse osmosis or activated carbon filter is recommended.
Where does Cypress's water come from?
Cypress's water is sourced from Groundwater. The city has 144 water systems serving approximately 75,711 residents.
What health violations has Cypress's water system had?
Cypress has 624 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. 1240 violations remain unresolved.
Is Cypress's groundwater at risk of contamination?
Cypress uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 4147 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
Why does Cypress have so many PFAS compounds in its water?
9 different PFAS "forever chemical" compounds were detected in Cypress'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 Cypress's water compare to other cities?
Cypress ranks #1052 out of 1067 cities in Texas (better than 1% of state cities) and #15571 out of 15744 cities nationally (1th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.