Total Haloacetic Acids (HAA5) violations in Washington
200 active public water systems in Washington had a Total Haloacetic Acids (HAA5) violation in the past three years, 13 of them in the latest quarter of EPA's data. What Total Haloacetic Acids (HAA5) is and why it matters.
Systems with a Total Haloacetic Acids (HAA5) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Makah Neah Bay Neah Bay · County |
1,300 | 11 | 0 | |
|
Lewis CO Water Dist #1 Lewis County |
1,174 | 1 | 0 | |
|
Kopachuck Middle & Voyager Elem WS Pierce County |
1,150 | 2 | 0 | |
|
Skokomish Skokomish Nation · County |
1,150 | 5 | 1 | |
|
Wilkeson Water Department Pierce County |
1,071 | 2 | 0 | |
|
Port Susan Camp Club #2 Marysville · County |
1,000 | 1 | 0 | |
|
Port Susan Camp Club #3 Marysville · County |
1,000 | 2 | 0 | |
|
Finley School District #53 Benton County |
990 | 4 | 0 | |
|
Odessa Lincoln County |
986 | 5 | 0 | |
|
Pioneer School District Mason County |
903 | 1 | 0 | |
|
Meridian School Complex Whatcom County |
900 | 1 | 0 | |
|
Carbonado Water Dept Pierce County |
875 | 1 | 0 | |
|
Rolling Hills-Glencairn Island County |
872 | 4 | 0 | |
|
PE Ell Town of Lewis County |
859 | 4 | 0 | |
|
Camaloch Association Island County |
825 | 1 | 0 | |
|
Heritage University Water System Toppenish · County |
750 | 5 | 1 | |
|
Northgate Terrace Community Club Island County |
750 | 2 | 0 | |
|
Lost Lake Property Owners Assn Island County |
736 | 2 | 0 | |
|
Garfield Water Department Whitman County |
694 | 4 | 0 | |
|
McNeil Island Water Pierce County |
692 | 2 | 1 | |
|
Griffin School Thurston County |
672 | 1 | 0 | |
|
Vistaire Water System Island County |
647 | 2 | 0 | |
|
Chehalis Tribal Housing Oakville · County |
620 | 7 | 0 | |
|
McKenna Water District Pierce County |
600 | 2 | 0 | |
|
North Whidbey Water District Island County |
568 | 2 | 0 | |
|
Northwood Casino Lynden · County |
500 | 5 | 0 | |
|
Pasco Port of 210 Franklin County |
500 | 3 | 0 | |
|
Sunvista Sunlight Beach HOA Island County |
500 | 1 | 0 | |
|
Newaukum Hill Water Assn Lewis County |
493 | 2 | 0 | |
|
Penn Cove Water and Sewer District Island County |
460 | 1 | 0 | |
|
Dugualla Community INC Island County |
459 | 4 | 0 | |
|
Black Diamond Water District Clallam County |
452 | 3 | 0 | |
|
Doe Bay Water Users Assoc San Juan County |
442 | 1 | 0 | |
|
Combined Water System Island County |
435 | 2 | 0 | |
|
Crosswoods Water System Island County |
420 | 1 | 0 | |
|
Resort and Marina Clallam County |
409 | 4 | 0 | |
|
Nooksack Market Deming · County |
400 | 5 | 0 | |
|
Sierra Country Club Island County |
400 | 1 | 0 | |
|
Omak Hud Nespelem · County |
380 | 9 | 0 | |
|
Sun Mountain Resort Okanogan County |
376 | 2 | 0 | |
|
Cuyamaca Olympia · County |
375 | 7 | 0 | |
|
Keller Mallott · County |
340 | 10 | 0 | |
|
Kalispel Usk · County |
330 | 7 | 0 | |
|
Kens Korner Island County |
300 | 2 | 0 | |
|
Mariners Cove Beach Club INC Island County |
300 | 2 | 0 | |
|
Driftwood Heights Association Island County |
298 | 1 | 0 | |
|
Camano Hills Water Company INC Island County |
286 | 1 | 0 | |
|
Whidbey Shores Water System Island County |
262 | 2 | 0 | |
|
Percie Road Water Association Whatcom County |
250 | 3 | 0 | |
|
Washtucna Water Department Adams County |
250 | 4 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Total Haloacetic Acids (HAA5), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Total Haloacetic Acids (HAA5) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.