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Long Term 2 Enhanced Surface Water Treatment Rule in U.S. Drinking Water

Health-based violation data for Long Term 2 Enhanced Surface Water Treatment Rule from EPA Safe Drinking Water Information System (SDWIS). Covers all community water systems with violations on record.

Long Term 2 Enhanced Surface Water Treatment Rule has been found in violation of EPA standards in 517 water systems across 40 states, with 4,538 total health-based violations recorded. The most affected states are Texas, Missouri, West Virginia.

Health-Based Violation Records
4,538
Water Systems Affected
517
States Affected
40

Long Term 2 Enhanced Surface Water Treatment Rule is regulated under the EPA Safe Drinking Water Act, which sets enforceable Maximum Contaminant Levels (MCLs) and associated treatment technique requirements for public water systems. The EPA Safe Drinking Water Information System (SDWIS) tracks every recorded violation nationwide and links it back to the specific public water system (PWSID), violation type, and begin date.

Across the United States, PlainEnviro's joined extract contains 4,538 health-based violation records carrying Long Term 2 Enhanced Surface Water Treatment Rule (EPA code 0800) across 517 active community water systems in 40 states. Raw record counts are highest in Texas, Missouri, West Virginia, with Texas accounting for 757 records across 18 systems. Health-effect prose is shown only when the official ECHO substance name matches a verified topic; otherwise the portal stays silent rather than inventing guidance.

A health-based violation does not mean residents were necessarily harmed, it means the contaminant exceeded the federal MCL in a compliance sample, triggering notification and remediation requirements. States and utilities maintain primary enforcement responsibility. To check the status of a specific water system, request its most recent Consumer Confidence Report or consult the EPA's Drinking Water Watch portal for the corresponding state.

Violations by State

States ranked by number of health-based violations for Long Term 2 Enhanced Surface Water Treatment Rule.

# State Violations Systems Affected
1 Texas 757 18
2 Missouri 415 18
3 West Virginia 388 115
4 Puerto Rico 326 28
5 Montana 160 10
6 Oklahoma 104 7
7 Pennsylvania 69 12
8 Tennessee 67 22
9 Kansas 59 5
10 Wyoming 49 12
11 California 48 12
12 Oregon 43 5
13 Kentucky 37 1
14 Alaska 36 2
15 Louisiana 36 11
16 Michigan 36 3
17 New Mexico 34 9
18 Washington 30 5
19 Ohio 29 18
20 South Dakota 26 15
21 Arkansas 19 7
22 New York 16 13
23 Utah 13 7
24 Colorado 11 3
25 Mississippi 11 1
26 Illinois 9 7
27 Minnesota 9 1
28 North Carolina 8 2
29 Arizona 7 5
30 Nebraska 7 3
31 Iowa 6 2
32 Maryland 6 4
33 Massachusetts 6 3
34 District of Columbia 4 2
35 Alabama 3 3
36 Indiana 2 2
37 Connecticut 1 1
38 Delaware 1 1
39 North Dakota 1 1
40 Wisconsin 1 1

Most Affected Water Systems

Top 50 water systems by number of Long Term 2 Enhanced Surface Water Treatment Rule health-based violations.

Water System State Violations
CASSIE WATER SYSTEM MO 337
BARKSDALE WSC TX 223
RAMBLE RIDGE SUBDIVISION TX 221
DENTON TOWN OF MT 135
LUQUILLO URBANO PR 91
CRYSTAL CLEAR SUD TX 78
WAGONER CO. RWD #4 OK 61
KICKAPOO TRIBAL WATERWORKS KS 55
CITY OF GROESBECK TX 48
CUBUY MAIZALES PR 46
OROCOVIS URBANO PR 43
LAS BOCAS PR 42
D BAR B MOBILE HOME RANCH TX 40
WARM SPRINGS WATER TREATMENT PLANT OR 37
EDMONSON CO WATER DISTRICT KY 37
METLAKATLA AK 35
WEBB COUNTY WATER UTILITIES TX 34
FREDERICKTOWN PWS MO 33
CONFLUENCE BORO MUNI AUTH PA 33
DEERFIELD MI 32
Havasu Water Company CA 30
GUAYABOTA PR 30
BEDFORD COUNTY U.D. TN 29
WALLA WALLA WATER DIVISION WA 24
CITY OF PFLUGERVILLE TX 22
DIXON, TOWN OF WY 21
NOWATA MUNICIPAL AUTHORITY OK 20
POPLAR BLUFF PWS MO 18
CITY OF TEMPLE TX 18
BARRANQUITAS URBANO PR 17
THE CLIFFS TX 17
Jicarilla Dulce NM 14
CITY OF ZAVALLA TX 14
LOGAN CO PSD-GREENVILLE SYSTEM WV 14
WAYNE WATER TOWN OF WV 14
WESTERN CLINTON CO MUN AUTH PA 12
AGUAS BUENAS URBANO PR 12
CITY OF MARLIN TX 12
CRWA LAKE DUNLAP WTP TX 12
RONCEVERTE WATER WV 12
CITY OF JACKSON MS 11
SHINNSTON CITY OF WV 11
PENDLETON WATER ASSOCIATION LA 10
TISHOMINGO MUNICIPAL AUTHORITY OK 10
TAHLEQUAH PWA OK 10
FARMINGTON TOWN OF WV 10
GRAND PORTAGE MN 9
LUMBERTON MDWCA NM 9
PINEVILLE MUNICIPAL WATER WV 9
CRAGMONT WC CO 8

Frequently Asked Questions

Is Long Term 2 Enhanced Surface Water Treatment Rule in my water?

Long Term 2 Enhanced Surface Water Treatment Rule has been detected in violation of EPA health standards in 517 water systems across 40 states. To check your specific utility, look up your annual Consumer Confidence Report (CCR) - water systems are required to disclose all violations.

How many water systems have Long Term 2 Enhanced Surface Water Treatment Rule violations?

EPA SDWIS records show 517 community water systems with health-based Long Term 2 Enhanced Surface Water Treatment Rule violations, totaling 4,538 violations. These represent cases where the contaminant exceeded the EPA Maximum Contaminant Level (MCL).

Which states have the most Long Term 2 Enhanced Surface Water Treatment Rule violations?

The states with the most Long Term 2 Enhanced Surface Water Treatment Rule violations are: Texas (757 violations), Missouri (415 violations), West Virginia (388 violations), Puerto Rico (326 violations), Montana (160 violations).

Explore More

Water Quality Home → All Contaminants → Browse by State →

About This Data

Violation data is from the EPA Safe Drinking Water Information System (SDWIS). Only health-based violations are shown, these include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Monitoring and reporting violations are excluded. Data may not reflect the most current enforcement actions.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from the U.S. Environmental Protection Agency (EPA). See our methodology for details. Retrieved and formatted by PlainEnviro