Arsenic violations in Washington
78 active public water systems in Washington had a Arsenic violation in the past three years, 10 of them in the latest quarter of EPA's data. What Arsenic is and why it matters.
Systems with a Arsenic violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Malott Nespelem · County |
95 | 9 | 0 | |
|
Marble Water System Stevens County |
94 | 7 | 1 | |
|
Beachwood Water Company Island County |
90 | 3 | 1 | |
|
Deer Lake Haven INC Island County |
90 | 3 | 0 | |
|
Pattons Retreat Water Assn Island County |
90 | 4 | 0 | |
|
Lake Wenatchee Water District Chelan County |
86 | 3 | 0 | |
|
Limestone Point Water Company INC San Juan County |
81 | 3 | 0 | |
|
Lofall Water System INC Kitsap County |
81 | 4 | 0 | |
|
Lenora Water and Sewer District Pend Oreille County |
75 | 2 | 0 | |
|
Ridgeview Estates Community Assn. Island County |
75 | 3 | 0 | |
|
Sunset West Island County |
75 | 2 | 0 | |
|
Georgeville County |
70 | 3 | 0 | |
|
Alpine Acres Community Association Chelan County |
51 | 6 | 0 | |
|
Bonnie View Water Island County |
50 | 2 | 0 | |
|
Holiday Hills Community Club INC Pierce County |
50 | 4 | 0 | |
|
Pleasant Harbor Marina Jefferson County |
50 | 4 | 0 | |
|
Aspen Reflections Landing Water Pend Oreille County |
49 | 3 | 0 | |
|
Skyland Park Water Association King County |
47 | 1 | 0 | |
|
Damman School Kittitas County |
45 | 5 | 1 | |
|
Evergreen Sky Ranch Community Wtr King County |
43 | 2 | 0 | |
|
Township 29 Water Association Island County |
42 | 2 | 0 | |
|
Maple Hill Park Island County |
35 | 4 | 0 | |
|
Sage Hills Second Water System Grant County |
34 | 2 | 0 | |
|
Georgetown Water Association Island County |
32 | 5 | 0 | |
|
Faranda Water Associaton Island County |
28 | 6 | 1 | |
|
Trails West Subdivision Stevens County |
27 | 7 | 1 | |
|
Twin Pines Mobile Home Park Okanogan County |
25 | 7 | 1 | |
|
Winlock Waters 2 Lewis County |
25 | 4 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Arsenic, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Arsenic 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.