Is Des Peres, MO Tap Water Safe to Drink?
Graded F — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
36.6/100
waterverge.com Des Peres, MO — Water Quality Report
Des Peres's drinking water received a grade of F (36.6 out of 100), indicating failing water quality. The city's 208 water systems serve approximately 126,472 residents using groundwater.
Lead levels were measured at 4.3 ppb (90th percentile), well within EPA limits. UCMR 5 testing detected 1 PFAS compound in the water supply.
The system has 14564 violations on record, including 2149 health-based violations. 3400 remain unresolved.
What to know about Des Peres's water
Des Peres ranks #509 out of 509 cities in Missouri for water quality, placing it among the lowest-rated in the state.
Des Peres 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.
PFAS compounds were detected in testing, though levels remain within current EPA limits. Residents seeking extra precaution may consider an activated carbon or reverse osmosis filter.
Hexavalent chromium (chromium-6) was detected at 0.26 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 2090 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Des Peres, MO water safe to drink?
Des Peres's drinking water has significant quality concerns based on EPA testing data. With a grade of F (36.6/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 208 water systems serve approximately 126,472 residents using groundwater (wells).
Recent water quality updates for Des Peres
A timeline of significant water quality events, violations, and data updates.
Detected at levels within current EPA limits. PFAS persist indefinitely in the environment.
Latest EPA compliance and testing data incorporated into Des Peres's water quality assessment. Grade: F (36.6/100).
4 health-based. Contaminants: Public Notice, Lead and Copper Rule, Stage 1 Disinfectants and Disinfection Byproducts Rule.
2 health-based. Contaminants: Revised Total Coliform Rule, Long Term 2 Enhanced Surface Water Treatment Rule, Interim Enhanced Surface Water Treatment Rule.
13 health-based. Contaminants: Public Notice, Lead and Copper Rule, Xylenes, Total.
Key contaminant findings
Based on the most recent EPA sampling data for Des Peres's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Detected but within current EPA limits. PFAS do not break down in the environment and can accumulate in the body over time. An activated carbon filter can reduce exposure.
Violation history
Des Peres's water system has 14,564 total violations on record, including 2,149 health-based violations. 3,400 remain unresolved. 2090 violations were issued in the last 5 years.
Where does Des Peres's water come from?
Des Peres's drinking water comes from groundwater (wells), supplied by 208 water systems serving approximately 126,472 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Creve Coeur Creek At Chesterfield (river), Creve Coeur Creek Near Creve Coeur (river), Fee Fee Creek Near Bridgeton (river), River Des Peres Near University City (river), River Des Peres Tributary At Pagedale (river).
What Des Peres residents can do
Recommended: Activated carbon or reverse osmosis filter. This addresses the specific contaminants found in Des Peres'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
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
Top industrial polluters within 10 miles of Des Peres
Industrial polluters nearby
Reported releases to surface water by facilities near Des Peres, ranked by pounds discharged annually.
Total reported releases to surface water: 214 lbs
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
POLYNT COMPOSITES USA INC. VALLEY PARK, MO63088 | Xylene (mixed isomers) | 214 | 4.1 mi |
ST LOUIS MARBLE CO FENTON, MO63026 | — | — | 4.4 mi |
CONTROL DEVICES FENTON, MO63026 | — | — | 4.4 mi |
KILLARK A DVISION OF HUBBELL FENTON, MO63026 | — | — | 3.5 mi |
CARLISLE POLYURETHANE SYSTEMS MARYLAND HEIGHTS, MO63043 | — | — | 7.6 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Des Peres
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- VALLEY PARK TCE3.4 mi
- ELLISVILLE SITE9.4 mi
Source: EPA Superfund National Priorities List
Recommended water filters
Based on contaminants detected in Des Peres'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. | 4.3 | 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. | 1.40 | 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. | ND | HI | µg/L | PFAS | Not 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. | 38.500 | 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | ND | HI | µg/L | PFAS | Not 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. | 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. | ND | 0.004 | µg/L | PFAS | Not Detected |
| 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. | ND | HI | µg/L | PFAS | Not 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 Des Peres compares by contaminant
Explore where Des Peres ranks among all Missouri cities for specific contaminants.
Water source & infrastructure
Where Des Peres's water comes from
Des Peres'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 private ownership and serves approximately 126,472 people through 208 water systems.
Water bodies near Des Peres
Des Peres is located near 5 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Des Peres
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MAGNOLIA-EDEN ISLES | LA1103013 | 10,155 | GW |
| MAGNOLIA-GREENLEAVES | LA1103118 | 8,031 | GW |
| MAGNOLIA-RESOLVE WHISPERWOOD | LA1103046 | 6,867 | GW |
| GULF PARK | MS0300044 | 4,813 | GW |
| MAGNOLIA-THE MEADOWS | LA1103106 | 4,701 | GW |
| MAGNOLIA-LAKESHORE ESTATES | LA1103171 | 4,146 | GW |
| TERRE DU LAC | MO4036059 | 3,200 | GW |
| WOOLMARKET VILLAGE ESTATES | MS0240237 | 2,910 | GW |
| MAGNOLIA-GUSTE ISLAND | LA1103189 | 2,847 | GW |
| FOUNTAINVIEW SUBDIVISION | TX1010127 | 2,703 | GW |
| CANEBRAKE UTILITY ASSOC INC | MS0370016 | 2,619 | GW |
| COPANO COVE SUBDIVISION | TX0040003 | 1,668 | SWP |
| INDIAN HILLS UTILITIES OPERATING COMPANY | MO6036052 | 1,600 | GW |
| MAGNOLIA-GREEN ACRES SUBDIVISION | LA1011004 | 1,575 | GW |
| WELLSGATE | MS0360068 | 1,447 | GW |
| OCEAN BEACH | MS0300113 | 1,407 | GW |
| MAGNOLIA-MONTEREY SUBDIVISION | LA1103148 | 1,356 | GW |
| MAGNOLIA-LE TRIOMPHE SUBDIVISION | LA1055162 | 1,278 | GWP |
| ROBINWOOD FOREST UTILITY INC | MS0240212 | 1,275 | GW |
| MAGNOLIA-PENN MILL LAKES | LA1103185 | 1,152 | GW |
| VACATION VILLAGE | TX0610052 | 1,140 | GW |
| LAKE SHERWOOD SUBD | MO6036039 | 1,100 | GW |
| LAKE LIMESTONE COVES WATER SYSTEM | TX1980020 | 1,080 | GW |
| ARANSAS BAY UTILITIES | TX0040018 | 1,062 | GW |
| LAKEWOOD ENVIRONMENTAL | MS0240052 | 982 | GW |
| TRI COUNTY POINT WATER SYSTEM 3 | TX1200028 | 915 | GW |
| PARKS UTILITIES | MS0520023 | 898 | GW |
| QUAIL RUN MHP | MO6031327 | 897 | GW |
| C WILLOW WATER | TX2470019 | 855 | GW |
| MAGNOLIA-JACKSON SQUARE | LA1055101 | 825 | GWP |
| MAGNOLIA-MONEY HILLS ESTATES | LA1103164 | 825 | GW |
| MAGNOLIA-RIVER PARK | LA1103198 | 822 | GW |
| PORT PERRY SERVICE | MO4036132 | 800 | GW |
| ABRAXAS UTILITIES | TX1840034 | 792 | GW |
| MAGNOLIA-WESTERN UTILITIES, INC | LA1073097 | 789 | GW |
| BUENA VISTA LAKES | MS0170020 | 768 | GW |
| COPANO RIDGE SUBDIVISION | TX0040029 | 765 | SWP |
| OAKLAND WATER WORKS | MS0010007 | 750 | GWP |
| HOUSTON ESTATES UTILITY-PALMETTO POINTE | MS0300162 | 713 | GW |
| COUNTRY SQUIRE WATER & SEWER | TX1810060 | 704 | GW |
| DANIELDALE COMMUNITY WATER SERVICE | TX0570044 | 702 | SWP |
| LAGUNA TRES SUBDIVISION | TX1110019 | 669 | GW |
| MAGNOLIA-LAKE STREET | LA1019091 | 651 | GW |
| LAGUNA VISTA SUBDIVISION | TX1110095 | 651 | GW |
| GLEN MEADOWS | MO6031360 | 650 | GW |
| MAGNOLIA-BRIER LAKE UTILITIES INC | LA1103141 | 630 | GW |
| OAK HILLS RANCH WATER | TX0940085 | 624 | GW |
| HILLS OF BRIAR OAKS | TX2490049 | 612 | GW |
| NORTH UNIVERSITY ESTATES | TX1520159 | 600 | GW |
| VILLE DALSACE WATER SUPPLY | TX1630037 | 597 | GW |
| MAGNOLIA-GRANDE PALMS | LA1103142 | 579 | GW |
| MAGNOLIA-DIXIE GARDEN | LA1017075 | 570 | SWP |
| PALMER CREEK UTILITY ASSC, INC | MS0240247 | 570 | GW |
| MAGNOLIA-WILDWOOD SOUTH | LA1017042 | 549 | SWP |
| MAGNOLIA-WINDY MEADOWS | LA1055169 | 549 | GWP |
| COLETO WATER | TX2350036 | 540 | GW |
| CEDAR GLEN CONDOMINIUMS | MO3071205 | 535 | GW |
| MAJESTIC LAKES | MO6031412 | 512 | GW |
| FRANKLIN WATER SYSTEMS 1 | TX1520224 | 510 | SWP |
| WHITE CYPRESS LAKES | MS0230051 | 507 | GW |
| GRANDE CASA | TX0700063 | 501 | GW |
| QUIET VILLAGE II | TX1080221 | 492 | SWP |
| MAGNOLIA-GARDEN HEIGHTS SUBDIVISION WS | LA1055138 | 483 | GW |
| MAGNOLIA-MARKRIDGE PARK SUBDIVISION | LA1055137 | 468 | GWP |
| MAGNOLIA-BEAU PARTERRE | LA1055164 | 462 | GWP |
| WOODLAND HARBOR | TX0320014 | 459 | GWP |
| TRI COUNTY POINT WATER SYSTEM 4 | TX1200029 | 456 | GW |
| MAGNOLIA-SPRING CREEK SUBDIVISION | LA1049028 | 444 | GW |
| RJR WATER | TX1840077 | 432 | GW |
| SHADY OAKS WATER | TX2470017 | 432 | GW |
| MAGNOLIA-BLEU LAKE HILLS | LA1103132 | 420 | GW |
| TEXAS LANDING UTILITIES | TX1870151 | 420 | GW |
| DEERWOOD UTILITIES | MS0240236 | 404 | GW |
| OAK HILL ESTATES | TX1013045 | 402 | GW |
| PASS CHRISTIAN ISLES | MS0240066 | 399 | GW |
| MAGNOLIA-SHENANDOAH ESTATES | LA1055155 | 396 | GWP |
| MAGNOLIA-OSSUN HEIGHTS | LA1055140 | 393 | GWP |
| ROCKY POINT COMMUNITY | TX0610041 | 384 | GW |
| ENID SHORES DEV WATER COMPANY | MS0540025 | 380 | GW |
| CENTER RIDGE WATER DISTRICT #2 | KY0180509 | 377 | GW |
| HICKORY HILL WATER | TX2470018 | 342 | GW |
| ENID LAKE ESTATES | MS0810016 | 338 | GW |
| COUNCIL CREEK VILLAGE | TX0270014 | 333 | GW |
| SPANISH GRANT SUBDIVISION | TX0700064 | 333 | GW |
| COPANO HEIGHTS WATER | TX0040017 | 330 | SWP |
| HERITAGE OAKS SUBDIVISION | TX1700121 | 330 | GW |
| MAGNOLIA-LAKESIDE EAST | LA1063098 | 324 | GWP |
| MAGNOLIA-PRUDEN CREEK | LA1103197 | 324 | GW |
| CSWR SOUTHWEST GARDEN WATER | TX1520217 | 324 | GW |
| LAKEVIEW RANCHETTES | TX0700057 | 318 | GW |
| MAGNOLIA-CARENCRO VILLAGE | LA1055088 | 315 | GWP |
| MAGNOLIA-COACH HOUSE MANOR | LA1055144 | 315 | GWP |
| TWELVE OAKS WATER SYSTEM | MS0360069 | 314 | GW |
| MAGNOLIA-UTILITY SERVICE OF LAKE CHARLES | LA1019024 | 306 | GW |
| MAGNOLIA WATER UTILITES - CHERRYWOOD | LA1103129 | 306 | GW |
| RIVER PINES PLANTATION UTILITIES | LA1063018 | 300 | GW |
| SEBASTIAN LAKE UTILITY OPERATING COMPANY | AR0000511 | 298 | SWP |
| MAGNOLIA-BRIGAS ESTATES | LA1019001 | 294 | GW |
| SOUTH SILVER CREEK I II & III | TX0270041 | 291 | GW |
| THE WOODS | MS0240258 | 285 | GW |
| MAGNOLIA-BELLEVILLE SUBDIVISION | LA1055094 | 282 | GWP |
| RED OAK COMMUNITY WATER SERVICE | TX0700056 | 280 | GW |
| MAGNOLIA-SOUTHFIELD SQUARE | LA1055128 | 279 | GWP |
| DEER SPRINGS WATER COMPANY | TX0270006 | 276 | GW |
| CENTER RIDGE WATER SYSTEM | KY0180549 | 273 | GW |
| MAGNOLIA-RIGOLETS ESTATES | LA1103122 | 273 | GW |
| SPRING BRANCH WATER | MO3031322 | 273 | GW |
| MAGNOLIA-AUTUMN HAVEN | LA1103190 | 267 | GW |
| LONGFORD PLACE WATER SYSTEM | TX1810015 | 262 | GW |
| VINEYARD RIDGE WATER SUPPLY | TX0860144 | 261 | GW |
| MAGNOLIA-I59 MHP | LA1103179 | 255 | GW |
| MAGNOLIA-GRANDE STAKES | LA1055116 | 252 | GWP |
| BIG WOOD SPRINGS WATER SYSTEM | TX2500019 | 252 | GW |
| MAGNOLIA-BEAU PRE | LA1103134 | 240 | GW |
| CHICKASAW HILLS SUBDIVISION | MS0540021 | 240 | GW |
| BLACK CREEK RETREAT | MS0180021 | 235 | GW |
| MAGNOLIA-HOMELAND HEIGHT | LA1103072 | 234 | GW |
| TEXAS LANDING UTILITIES DEERWOOD | TX1700798 | 234 | GW |
| NORTH VICTORIA UTILITIES | TX2350049 | 234 | GW |
| TALL PINES UTILITY | TX1010220 | 213 | GW |
| MAGNOLIA-CHARTRES PLACE SUBDIVISION | LA1055173 | 210 | GWP |
| CRAZY HORSE RANCH WATER | TX1840024 | 210 | GW |
| HIDE-A-WAY HILLS WATER COMPANY | MS0540029 | 209 | GW |
| CENTER RIDGE WATER DISTRICT #3 | KY0180502 | 208 | GW |
| MAGNOLIA-TREWHILL | LA1055148 | 207 | GWP |
| 4 R RANCH WATER 2 | TX1160091 | 204 | GW |
| GASCONY VILLAGE | MO3031293 | 202 | GW |
| FRANKLIN WATER SYSTEMS 3 | TX1520080 | 201 | GW |
| MAGNOLIA-RIGOLETS HARBOR | LA1103144 | 200 | GW |
| MAGNOLIA-PORT LOUIS TOWNHOMES | LA1103153 | 200 | GW |
| MAGNOLIA-COTTAGES OF ACADIANA | LA1055131 | 196 | GW |
| MAGNOLIA-EVANGELINE OAKS | LA1015009 | 195 | GW |
| THE WOODLANDS WATER SYSTEM | TX1050139 | 195 | GW |
| MAGNOLIA-LEXINGTON HEIGHTS | LA1055147 | 192 | GW |
| MAGNOLIA-FOX RUN | LA1055043 | 189 | GWP |
| MAGNOLIA-PEG LEG COVE | LA1085018 | 189 | SWP |
| MAGNOLIA-VILLAGE QUEST SUBDIVISION | LA1055070 | 186 | GW |
| TRI COUNTY POINT WATER SYSTEM 2 | TX1200027 | 186 | GW |
| WOOD TRAIL WATER SUPPLY | TX1330137 | 186 | GW |
| FREMONT WATER | TX1330153 | 183 | GW |
| GLADLO WATER & SEWER INC | MO3036151 | 182 | GW |
| MAGNOLIA-PILOT STREET | LA1103193 | 174 | GW |
| THE MISSING WELL | MO3031366 | 173 | SWP |
| THE HIGHLANDS | MS0690051 | 172 | GW |
| MAGNOLIA-PENN MILL PLACE | LA1103200 | 171 | GW |
| TEXAS LANDING UTILITIES GOODE CITY | TX1700744 | 168 | GW |
| MAGNOLIA-BROOKHOLLOW SUBDIVISION | LA1055166 | 165 | GWP |
| MAGNOLIA-RIVERSCAPE @ CLIO SUB | LA1063106 | 165 | GW |
| MEADOWVIEW ESTATES | TX0080051 | 162 | GW |
| WATER WORKS 2 ISLAND LODGES | TX1500019 | 162 | SWP |
| CIMMARON BAY SUBDIVISION | MO3031290 | 160 | GW |
| CHAPARRAL WATER SYSTEM GILLESPIE | TX0860010 | 159 | GW |
| EMERALD FOREST | TX0700058 | 158 | GW |
| EVERGREEN LAKE ESTATES | MO6036134 | 150 | GW |
| ROY L UTILITIES | MO6251710 | 150 | GW |
| AMBERWOOD SUBDIVISION | TX1011920 | 150 | GW |
| MEADOWVIEW ESTATES II | TX0080059 | 144 | GW |
| CIRCLE R RANCHETTES | TX2200148 | 141 | GW |
| SETTLERS MEADOWS WATER SYSTEM | TX0080055 | 138 | GW |
| SAN PEDRO VILLAGE | TX2330046 | 138 | GWP |
| ROUSES | MS0300110 | 137 | GW |
| SETTLERS CROSSING WATER SYSTEM 2 | TX0080060 | 135 | GW |
| ARROWHEAD WATER SYSTEM | TX2470025 | 135 | GW |
| MAGNOLIA-PINNACLE PLACE SUBDIVISION | LA1055175 | 132 | GWP |
| SETTLERS ESTATES SEC II | TX0080056 | 132 | GW |
| EL PINON ESTATES WATER SYSTEM | TX2030013 | 131 | GW |
| JOHNSON BAY SUBDIVISION | MO3031338 | 126 | GW |
| SETTLERS CROSSING WATER SYSTEM | TX0080058 | 123 | GW |
| EAGLE WOODS SUBDIVISION | MO5030015 | 118 | GW |
| MAGNOLIA-COUNTRY PINES | LA1055040 | 117 | GWP |
| FLAG CREEK RANCH | TX1500112 | 117 | GW |
| TIMBERLANE WATER SYSTEM | TX2020054 | 117 | GW |
| TREETOP ESTATES | TX1840134 | 114 | GW |
| MAGNOLIA-JONES ROLLING RIDGE | LA1017029 | 111 | GW |
| SOUTH COUNCIL CREEK 2 | TX0270080 | 111 | GW |
| VISTA VERDE WATER SYSTEMS | TX1700694 | 111 | GW |
| AUBURN LAKE SUBDIVISION | MO6031409 | 110 | GW |
| HUBERT WATSON SUBDIVISION | TX1610114 | 108 | GW |
| CASSIE WATER SYSTEM | TX0270047 | 106 | GU |
| CENTER RIDGE WATER DISTRICT #4 | KY0183106 | 105 | GW |
| MAGNOLIA-DIXIE GARDEN-KINGS HWY | LA1017087 | 100 | SWP |
| MAGNOLIA-BEVERLY HEIGHTS | LA1103178 | 100 | GW |
| CONFLUENCE RIVERS M & M MHP WTP | MO1041228 | 100 | GW |
| PARKVIEW WATER SUPPLY | TX1810127 | 88 | GW |
| KNOLLWOOD | MS0240027 | 87 | GWP |
| CHELSEA ROSE SUBD | MO3031244 | 83 | GW |
| MAGNOLIA-HIGHLAND RIDGE | LA1063087 | 80 | GW |
| MAGNOLIA-WHIPPOORWILL GROVE | LA1103165 | 78 | GW |
| LAKESIDE ESTATES WATER SYSTEM | TX0080053 | 78 | GW |
| WATER WORKS 1 FLOYD ACRES | TX1500018 | 78 | SWP |
| CONFLUENCE RIVERS FAWN LAKE WATER SYSTEM | MO6031357 | 72 | GW |
| HILLSIDE ESTATES WATER SYSTEM | TX0080049 | 72 | GW |
| DEER COUNTRY WSC | TX1500121 | 72 | GW |
| AERO VALLEY WATER SERVICE | TX0610243 | 68 | GW |
| LINCECUM WATER POWERS ADDITION | TX0200159 | 66 | GW |
| SKY HARBOR RANCHETTES WATER SYSTEM | TX1330175 | 66 | GW |
| LIVE OAK HILLS SUBDIVISION | TX1540012 | 65 | GW |
| CLERMONT HARBOR | MS0230003 | 61 | GW |
| CONFLUENCE RIVERS STONE RIDGE MEADOWS | MO6031488 | 60 | GW |
| LA PLAYA SUBDIVISION WATER SYSTEM | TX2030015 | 59 | GW |
| FARRAR WSC | TX1470007 | 57 | GW |
| MAGNOLIA-HABERSHAM SUBDIVISION | LA1055174 | 54 | GWP |
| MAGNOLIA-PORT EAST | LA1045037 | 45 | GW |
| THOUSAND OAKS SUBDIVISION | TX0720054 | 45 | GW |
| EGRET LANDING WATER SYSTEM | LA1073117 | 42 | SWP |
| CALVEY BROOK ESTATES | MO6031385 | 40 | GW |
| WOODLANDS WEST | TX0260043 | 27 | GW |
| SANDSTONE LAKE WATER SUPPLY | LA1117127 | 25 | GW |
How Des Peres compares
Full Missouri rankings →Des Peres's score of 36.6/100 is below the average of 68/100 among major Missouri cities. 10 of 10 nearby cities score higher.
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Guides and resources related to Des Peres's water quality findings.
Explore water quality across St. Tammany Parish
Frequently asked questions
Is Des Peres, MO tap water safe to drink?
Des Peres's water quality earned a grade of F (36.6/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #509 out of 509 cities tested in Missouri.
What contaminants are in Des Peres's water?
Lead was measured at 4.3 ppb (90th percentile). 1 PFAS compound was detected. 14564 violations are on record.
How is Des Peres'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 Des Peres?
PFAS compounds have been detected. A filter with activated carbon can help reduce exposure.
Where does Des Peres's water come from?
Des Peres's water is sourced from Groundwater. The city has 208 water systems serving approximately 126,472 residents.
What health violations has Des Peres's water system had?
Des Peres has 2149 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. 3400 violations remain unresolved.
Is Des Peres's groundwater at risk of contamination?
Des Peres 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 14564 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.
How does Des Peres's water compare to other cities?
Des Peres ranks #509 out of 509 cities in Missouri (better than 0% of state cities) and #15456 out of 15744 cities nationally (2th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.