Oklahoma Water Quality
Health violation data for 883 community water systems in Oklahoma. Based on EPA Safe Drinking Water Information System (SDWIS) data.
Water Systems
883
Total Violations
28,341
Systems with Violations
50
Cities with Issues
475
Water Systems with Most Violations
| # | Water System | Violations | Health |
|---|---|---|---|
| 1 | HOMINY Hominy | 563 | Yes |
| 2 | BARNSDALL Barnsdall | 379 | Yes |
| 3 | MAYSVILLE Maysville | 378 | Yes |
| 4 | WEWOKA PUBLIC WORKS AUTHORITY Wewoka | 378 | Yes |
| 5 | SARDIS LAKE WATER AUTHORITY Clayton | 366 | Yes |
| 6 | CLEVELAND MUNICIPAL AUTHORITY Cleveland | 337 | Yes |
| 7 | FAIRFAX Fairfax | 313 | Yes |
| 8 | RYAN UTILITIES AUTHORITY Ryan | 295 | Yes |
| 9 | WAURIKA PUBLIC WORKS AUTHORITY Waurika | 275 | Yes |
| 10 | BEGGS Beggs | 270 | Yes |
| 11 | GRANDFIELD Grandfield | 262 | Yes |
| 12 | OSAGE CO RWD #20 (HULAH) Bartlesville | 243 | Yes |
| 13 | PUSHMATAHA CO. RWD #3 Antlers | 233 | Yes |
| 14 | CHOCTAW CO. RWSG & SWMD #6 Boswell | 233 | Yes |
| 15 | EUFAULA PWA Eufaula | 231 | Yes |
| 16 | PITTSBURG CO. RWD #14 Mcalester | 220 | Yes |
| 17 | WAGONER CO. RWD #2 Wagoner | 210 | Yes |
| 18 | MUSKOGEE CO. RWD #3 Council Hill | 207 | Yes |
| 19 | BOSWELL PUBLIC WORKS AUTHORITY Boswell | 205 | Yes |
| 20 | STRINGTOWN PWA Stringtown | 198 | Yes |
| 21 | MUSKOGEE CO. RWD #5 Muskogee | 192 | Yes |
| 22 | IDABEL PWA Idabel | 190 | Yes |
| 23 | SHIDLER Shidler | 187 | Yes |
| 24 | SOUTHERN OKLA WATER CORP Ardmore | 182 | Yes |
| 25 | PITTSBURG Pittsburg | 181 | Yes |
| 26 | ASHER UTIL DEV AUTH Asher | 181 | Yes |
| 27 | COWETA PWA Coweta | 180 | Yes |
| 28 | MCCURTAIN MUNICIPAL AUTHORITY Mccurtain | 180 | Yes |
| 29 | SPIRO EAST WATER ASSOCIATION Spiro | 178 | Yes |
| 30 | OKMULGEE CO. RWD #2 (PRESTON) Preston | 177 | Yes |
| 31 | MAJOR COUNTY RWD #1 Fairview | 175 | Yes |
| 32 | PECAN TREE WATER ASSN Noble | 174 | Yes |
| 33 | HASKELL PWA-SWP Haskell | 172 | Yes |
| 34 | COMANCHE PUBLIC WORKS AUTHORITY Comanche | 170 | Yes |
| 35 | WANETTE PUBLIC WORKS AUTHORITY Wanette | 167 | Yes |
| 36 | PAYNE CO RWD #4 Yale | 166 | Yes |
| 37 | ELM BEND RWD INC Nowata | 159 | Yes |
| 38 | GRAYHORSE RWD Fairfax | 159 | Yes |
| 39 | ADAMSON RWD #8 Hartshorne | 159 | Yes |
| 40 | HUGO MUNICIPAL AUTHORITY Hugo | 158 | Yes |
| 41 | TALIHINA PWA Talihina | 154 | Yes |
| 42 | MCALESTER PWA Mcalester | 154 | Yes |
| 43 | EAKLY DEVELOPMENT CORP Eakly | 150 | Yes |
| 44 | HOLDENVILLE Holdenville | 149 | Yes |
| 45 | MCINTOSH CO. RWD #5 Checotah | 146 | Yes |
| 46 | YALE Yale | 144 | Yes |
| 47 | AVANT UTILITIES AUTHORITY Avant | 143 | Yes |
| 48 | OKARCHE RWD, INC Okarche | 143 | Yes |
| 49 | ATOKA CO. RWS & SWMD #4 Atoka | 142 | Yes |
| 50 | OKMULGEE CO. RWD #1 Schulter | 142 | Yes |
Most Common Contaminants in Oklahoma
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Total Trihalomethanes (TTHM) | 13,837 | 294 |
| Haloacetic Acids (HAA5) | 4,559 | 184 |
| Chloroform | 1,591 | 77 |
| Total Coliform | 1,517 | 457 |
| Nitrite | 1,409 | 51 |
| Turbidity | 1,380 | 81 |
| Total Coliform (RTCR) | 1,131 | 430 |
| Arsenic | 783 | 73 |
| Gross Alpha | 473 | 471 |
| Barium | 345 | 13 |
| Nitrate | 333 | 53 |
| Lead (Action Level) | 228 | 10 |
| Copper | 158 | 17 |
| Antimony | 99 | 38 |
| Atrazine | 92 | 7 |
Cities with Water Quality Issues
Oklahoma City Edmond Chickasha Ninnekah Crescent El Reno Davis Harrah Guthrie Marlow Norman Noble Perry Piedmont Tuttle Union City Wynnewood Weatherford Yukon Moore Ardmore Elmore City Kingston Madill Mead Fort Sill Lawton Duke Duncan Fletcher Frederick Clinton Cheyenne Cordell Enid Kremlin Okarche Woodward Freedom Vici +435 more
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Oklahoma are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.