EPA drinking water rule · 210
Stage 1 Disinfectants and Disinfection Byproducts Rule
See how this rule appears in the reported histories and find systems with unresolved health-based records.
- Violation records shown
- 19,705
- Systems with a linked record
- 6,511
- Unresolved health-based records
- 277
Rule records by EPA-listed state
| Listed state | Systems | Violation records | Unresolved health-based records |
|---|---|---|---|
| Alabama | 28 | 42 | 0 |
| Alaska | 149 | 1,835 | 0 |
| American Samoa | 4 | 11 | 0 |
| Arizona | 376 | 1,486 | 2 |
| Arkansas | 96 | 553 | 204 |
| California | 81 | 366 | 4 |
| Colorado | 369 | 788 | 8 |
| Connecticut | 31 | 75 | 0 |
| District of Columbia | 1 | 3 | 0 |
| Florida | 2 | 3 | 0 |
| Georgia | 2 | 3 | 1 |
| Idaho | 127 | 342 | 0 |
| Illinois | 333 | 617 | 0 |
| Indiana | 28 | 35 | 0 |
| Iowa | 7 | 12 | 2 |
| Kansas | 320 | 757 | 0 |
| Kentucky | 14 | 15 | 1 |
| Louisiana | 14 | 62 | 0 |
| Maine | 5 | 15 | 0 |
| Maryland | 5 | 7 | 0 |
| Massachusetts | 15 | 38 | 1 |
| Michigan | 103 | 150 | 1 |
| Minnesota | 110 | 136 | 7 |
| Mississippi | 312 | 452 | 0 |
| Missouri | 60 | 105 | 3 |
| Montana | 15 | 61 | 0 |
| Nebraska | 4 | 5 | 0 |
| Nevada | 26 | 95 | 1 |
| New Hampshire | 50 | 71 | 0 |
| New Jersey | 145 | 364 | 1 |
| New Mexico | 193 | 812 | 0 |
| New York | 54 | 97 | 13 |
| North Carolina | 206 | 341 | 0 |
| North Dakota | 99 | 181 | 0 |
| Northern Mariana Islands | 4 | 18 | 0 |
| Ohio | 21 | 28 | 2 |
| Oklahoma | 444 | 2,386 | 0 |
| Oregon | 14 | 57 | 2 |
| Pennsylvania | 577 | 1,711 | 0 |
| Puerto Rico | 2 | 2 | 0 |
| Rhode Island | 13 | 36 | 0 |
| South Carolina | 32 | 44 | 0 |
| South Dakota | 115 | 190 | 8 |
| Tennessee | 60 | 80 | 1 |
| Texas | 1,346 | 3,985 | 0 |
| Utah | 3 | 3 | 0 |
| Vermont | 41 | 109 | 0 |
| Virginia | 132 | 246 | 3 |
| Washington | 33 | 85 | 0 |
| West Virginia | 190 | 633 | 12 |
| Wisconsin | 72 | 102 | 0 |
| Wyoming | 28 | 55 | 0 |
Systems with unresolved health-based records for this rule
- ADVENIR FRENCH QUARTERCO0116104 · Colorado · 1 unresolved health-based records for this rule
- Ak-Chin Village090400090 · Arizona · 1 unresolved health-based records for this rule
- AlphaMN1320001 · Minnesota · 1 unresolved health-based records for this rule
- ANDREWS FARM WATER CO.,INC.MA3038020 · Massachusetts · 1 unresolved health-based records for this rule
- ANTOINE WATERWORKSAR0000424 · Arkansas · 28 unresolved health-based records for this rule
- ATTICA CORRECTIONALNY6030008 · New York · 1 unresolved health-based records for this rule
- AUTUMN ACRES MHPAR0000890 · Arkansas · 6 unresolved health-based records for this rule
- BARNES CITY WATER SUPPLYIA7905088 · Iowa · 1 unresolved health-based records for this rule
- Battle Mountain093200364 · Nevada · 1 unresolved health-based records for this rule
- BENHAM WATER PLANTKY0480028 · Kentucky · 1 unresolved health-based records for this rule
- BERNDT CREEK WATER CORPOR4105737 · Oregon · 1 unresolved health-based records for this rule
- Big Pine Paiute Band090600120 · California · 1 unresolved health-based records for this rule
- BOULDER COLONYSD4600339 · South Dakota · 1 unresolved health-based records for this rule
- BowlusMN1490009 · Minnesota · 1 unresolved health-based records for this rule
- BRIARCLIFF WATERWORKSAR0000024 · Arkansas · 2 unresolved health-based records for this rule
- BURLINGTON JUNCTION PWSMO1010117 · Missouri · 1 unresolved health-based records for this rule
- CLARENDON WATERWORKSAR0000385 · Arkansas · 29 unresolved health-based records for this rule
- COAL MOUNTAIN WATERWV3305527 · West Virginia · 1 unresolved health-based records for this rule
- COHOES CITYNY0100192 · New York · 1 unresolved health-based records for this rule
- COVINGTON, CITY OFVA2580100 · Virginia · 1 unresolved health-based records for this rule
- COWLESVILLE WATER DISTRICTNY6030016 · New York · 1 unresolved health-based records for this rule
- CREST MOBILE ESTATES MHPCO0121190 · Colorado · 1 unresolved health-based records for this rule
- DELIGHT WATERWORKSAR0000423 · Arkansas · 28 unresolved health-based records for this rule
- DOVE HILL WATERWORKSVA6047062 · Virginia · 1 unresolved health-based records for this rule
- ESCALANTE VILLAGECO0134255 · Colorado · 1 unresolved health-based records for this rule
- FAIRBURN WATER ASSOCIATIONSD4600877 · South Dakota · 1 unresolved health-based records for this rule
- FAIRVIEW TOWN OFWV3302503 · West Virginia · 1 unresolved health-based records for this rule
- FENWICK MOUNTAIN PSDWV3303406 · West Virginia · 1 unresolved health-based records for this rule
- FORT GAY WATER WORKSWV3305004 · West Virginia · 1 unresolved health-based records for this rule
- FOUKE WATERWORKSAR0000358 · Arkansas · 12 unresolved health-based records for this rule
- FOUNTAIN HILL WATERWORKSAR0000016 · Arkansas · 1 unresolved health-based records for this rule
- FOUR STATES PSDWV3302506 · West Virginia · 1 unresolved health-based records for this rule
- GaryMN1540010 · Minnesota · 1 unresolved health-based records for this rule
- GLADWIN, CITY OFMI0002650 · Michigan · 1 unresolved health-based records for this rule
- GREEN ACRE MANUFACTURED HOME PARKNY1206336 · New York · 1 unresolved health-based records for this rule
- GREEN ISLAND VILLAGENY0100195 · New York · 1 unresolved health-based records for this rule
- Grindstone Rancheria090605004 · California · 1 unresolved health-based records for this rule
- HARTMAN TOWN OFCO0150500 · Colorado · 1 unresolved health-based records for this rule
- HIAWATHA WATERWV3302814 · West Virginia · 1 unresolved health-based records for this rule
- Hopi High School - BIA090400395 · Arizona · 1 unresolved health-based records for this rule
- HOSANNA HEIGHTS WATERAR0000884 · Arkansas · 31 unresolved health-based records for this rule
- HOSMERSD4600162 · South Dakota · 1 unresolved health-based records for this rule
- Indian Village090605154 · California · 1 unresolved health-based records for this rule
- JOBEE ACRESSD4600019 · South Dakota · 1 unresolved health-based records for this rule
- LAKE SANCHEZ ESTATESCO0212466 · Colorado · 1 unresolved health-based records for this rule
- LEDGEVIEW VILLAGENY5620267 · New York · 1 unresolved health-based records for this rule
- LEES MOBILE HOME PARKNY0310328 · New York · 1 unresolved health-based records for this rule
- LEISURE HILLS MOBILE HOME PARKAR0000747 · Arkansas · 22 unresolved health-based records for this rule
- LODGES AT CAIRONY1905404 · New York · 1 unresolved health-based records for this rule
- LONDON WATER CO-OPOR4100239 · Oregon · 1 unresolved health-based records for this rule
- MANCHESTERGA1990003 · Georgia · 1 unresolved health-based records for this rule
- MARION WATERWORKSAR0000152 · Arkansas · 10 unresolved health-based records for this rule
- MARTHASVILLE PWSMO6010505 · Missouri · 1 unresolved health-based records for this rule
- MEDFORD TWP DEPT OF MUNINJ0320001 · New Jersey · 1 unresolved health-based records for this rule
- MESCAL CREEK WATER, INCCA1900147 · California · 1 unresolved health-based records for this rule
- MINISTERS RUN WATER ASSOCWV3302514 · West Virginia · 1 unresolved health-based records for this rule
- MINNESOTA PIPELINECO0115513 · Colorado · 1 unresolved health-based records for this rule
- MIRROR LAKE TRAILER PARKNY5501368 · New York · 1 unresolved health-based records for this rule
- NORTH HERMOSA WUDSD4600329 · South Dakota · 1 unresolved health-based records for this rule
- NORTH LINCOLN WSDCO0116552 · Colorado · 1 unresolved health-based records for this rule
- NORTH WASHINGTON WUACO0101110 · Colorado · 1 unresolved health-based records for this rule
- ODRC-PICKAWAY CORRECTION PWSOH6501712 · Ohio · 1 unresolved health-based records for this rule
- OZARK PARK ESTATESMO5048271 · Missouri · 1 unresolved health-based records for this rule
- PICKENS WATERWORKSAR0000172 · Arkansas · 28 unresolved health-based records for this rule
- PIEDMONT MUNICIPAL WTR WKSWV3302921 · West Virginia · 2 unresolved health-based records for this rule
- PINE HILLVA2161668 · Virginia · 1 unresolved health-based records for this rule
- PINNACLE WATER ASSOCIATIONWV3302828 · West Virginia · 1 unresolved health-based records for this rule
- POTOMAC FARMS WATER COWV3301947 · West Virginia · 1 unresolved health-based records for this rule
- STEUBENVILLE, CITY OFOH4102411 · Ohio · 1 unresolved health-based records for this rule
- StrandquistMN1450010 · Minnesota · 1 unresolved health-based records for this rule
- STRONG WATERWORKSAR0000556 · Arkansas · 1 unresolved health-based records for this rule
- SUNSET WATER ASSOCIATIONAR0000472 · Arkansas · 2 unresolved health-based records for this rule
- TintahMN1780003 · Minnesota · 2 unresolved health-based records for this rule
- ULM WATERWORKSAR0000451 · Arkansas · 4 unresolved health-based records for this rule
- VALLEY VIEW ESTATESSD4600300 · South Dakota · 1 unresolved health-based records for this rule
- VIVOS XPOINTSD4600414 · South Dakota · 1 unresolved health-based records for this rule
- WALTON COUNTRY MEADOW PARKNY1220347 · New York · 1 unresolved health-based records for this rule
- Warroad MHP CommunityMN1680012 · Minnesota · 1 unresolved health-based records for this rule
- WATERTOWN WATER SYSTEMTN0000732 · Tennessee · 1 unresolved health-based records for this rule
- WESSINGTON SPRINGSSD4600362 · South Dakota · 1 unresolved health-based records for this rule
- WESTWOOD WATER SUPPLYIA4453318 · Iowa · 1 unresolved health-based records for this rule
- WHISPERING PINES MHPNY0310358 · New York · 1 unresolved health-based records for this rule
- WHITE PINES SOUTHNY4501821 · New York · 1 unresolved health-based records for this rule
- WOODLAND APTS AT CAIRO NORTHNY1916985 · New York · 1 unresolved health-based records for this rule
- WORTHINGTON TOWN OFWV3302524 · West Virginia · 1 unresolved health-based records for this rule
EPA data and scope
How to read the records
The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.
- We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
- EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
- Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
- We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.
EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility