Chlorine (MRDL) violations in Washington
44 active public water systems in Washington had a Chlorine (MRDL) violation in the past three years, 7 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Nisqually-Leschi & West Nisqually Olympia · County |
3,200 | 7 | 0 | |
|
Squaxin Consolidated Shelton · County |
1,500 | 6 | 1 | |
|
Skokomish Skokomish Nation · County |
1,150 | 5 | 1 | |
|
Heritage University Water System Toppenish · County |
750 | 5 | 1 | |
|
Sauk-Suiattle Darrington · County |
80 | 7 | 3 | |
|
Pace International Wapato · County |
48 | 2 | 1 | |
|
B & D Mobile Court Zillah · County |
45 | 6 | 3 | |
|
Quil Ceda Village Tulalip · County |
30,000 | 4 | 0 | |
|
Lummi Tribal Water District Ferndale · County |
3,699 | 8 | 3 | |
|
Snoqualmie Casino Snoqualmie · County |
3,000 | 3 | 0 | |
|
Angel of the Winds Arlington · County |
2,303 | 5 | 0 | |
|
Suquamish Regional Public Water System Poulsbo · County |
1,874 | 5 | 0 | |
|
Taholah Tahola · County |
1,600 | 4 | 2 | |
|
Lucky Eagle Casino Oakville · County |
1,550 | 5 | 3 | |
|
Makah Neah Bay Neah Bay · County |
1,300 | 11 | 0 | |
|
Washington Beef LLC Toppenish · County |
1,025 | 2 | 0 | |
|
Tribal Complex Wapato · County |
907 | 3 | 0 | |
|
White Swan Wapato · County |
900 | 3 | 0 | |
|
Quileute Water System Lapush · County |
885 | 2 | 0 | |
|
Adams View Wapato · County |
790 | 2 | 0 | |
|
Chehalis Tribal Housing Oakville · County |
620 | 7 | 0 | |
|
Sackman Suquamish · County |
500 | 2 | 0 | |
|
Nespelem Agency Nespelem · County |
445 | 9 | 0 | |
|
Omak Hud Nespelem · County |
380 | 9 | 0 | |
|
Cuyamaca Olympia · County |
375 | 7 | 0 | |
|
Keller Mallott · County |
340 | 10 | 0 | |
|
Parker County |
300 | 4 | 0 | |
|
Rocky River Road Community Site Nespelem · County |
260 | 8 | 0 | |
|
Paschal Sherman Indian School Omak · County |
220 | 7 | 0 | |
|
Lake Quinault School Dist. 97 Amanda Park · County |
210 | 6 | 0 | |
|
Stillaguamish Village Mount Vernon · County |
210 | 6 | 1 | |
|
Qui Nai Elt Village Quinault · County |
207 | 3 | 1 | |
|
Queets Tahola · County |
200 | 5 | 3 | |
|
Olympic Park Trailer Court Amanda Park · County |
169 | 4 | 0 | |
|
5 Cedars Deming · County |
150 | 5 | 0 | |
|
Rutsatz Road Deming · County |
150 | 5 | 0 | |
|
Wolf Point Wapato · County |
125 | 2 | 0 | |
|
Hoh Tribe Forks · County |
120 | 9 | 1 | |
|
Seatons Grove Nespelem · County |
115 | 9 | 1 | |
|
Malott Nespelem · County |
95 | 9 | 0 | |
|
Santiago Water Association Moclips · County |
95 | 2 | 0 | |
|
Georgeville County |
70 | 3 | 0 | |
|
Twin Lakes Hud Nespelem · County |
42 | 8 | 1 | |
|
Stillaguamish Natural Resources Arlington · County |
31 | 3 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) 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.