All water systems in Washington
4,692 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Tenino City of Thurston County |
3,336 | 1 | 0 | |
|
Newport City of Pend Oreille County |
3,331 | 4 | 0 | |
|
Algona Water Dept King County |
3,300 | 1 | 0 | |
|
Oroville City of Okanogan County |
3,256 | 0 | 0 | |
|
Fox Island Mutual Water Assoc Pierce County |
3,255 | 0 | 0 | |
|
Muckleshoot Auburn · County |
3,250 | 1 | 0 | |
|
Rock Island Water Dept City of Douglas County |
3,226 | 1 | 0 | |
|
Ames Lake Water Assoc INC King County |
3,224 | 1 | 0 | |
|
Toutle Community Regional Water Cowlitz County |
3,215 | 2 | 0 | |
|
Nisqually-Leschi & West Nisqually Olympia · County |
3,200 | 7 | 0 | |
|
Providence Shmc Spokane County |
3,199 | 0 | 0 | |
|
Strohs Pierce County |
3,192 | 0 | 0 | |
|
Sprague Lake EB Rest Area Lincoln County |
3,187 | 0 | 0 | |
|
Twanoh State Park Mason County |
3,173 | 0 | 0 | |
|
Lake Forest Park Water District King County |
3,171 | 0 | 0 | |
|
Maytown Rest Area Thurston County |
3,134 | 0 | 0 | |
|
Highland Water District Snohomish County |
3,121 | 2 | 0 | |
|
Rainier Water Department Thurston County |
3,103 | 1 | 0 | |
|
Meadows 690 Thurston County |
3,100 | 0 | 0 | |
|
Box Canyon Pierce County |
3,099 | 0 | 0 | |
|
Schrag Eb/wb Rest Areas Adams County |
3,096 | 1 | 0 | |
|
Napavine City of Lewis County |
3,095 | 1 | 0 | |
|
Olympic Water & Sewer INC Jefferson County |
3,086 | 0 | 0 | |
|
Snake River Housing Water System Walla Walla County |
3,036 | 0 | 0 | |
|
Yacolt Clark County |
3,034 | 0 | 0 | |
|
Dry Creek Water Association Clallam County |
3,030 | 0 | 0 | |
|
Sunrise NO 12 Pierce County |
3,018 | 1 | 0 | |
|
Carson Skamania County |
3,015 | 2 | 0 | |
|
Snoqualmie Casino Snoqualmie · County |
3,000 | 3 | 0 | |
|
Fall City Water Dist. #127 King County |
2,987 | 1 | 0 | |
|
Sno Pud 1 Warm Beach Snohomish County |
2,977 | 1 | 0 | |
|
Clearwood Thurston County |
2,956 | 0 | 0 | |
|
Cedar Crest Pierce County |
2,954 | 0 | 0 | |
|
Dosewallips State Park Jefferson County |
2,941 | 1 | 0 | |
|
South Bend Water Department Pacific County |
2,930 | 0 | 0 | |
|
Erland Point Water CO Kitsap County |
2,909 | 0 | 0 | |
|
Steamboat Rock State Park #1 Grant County |
2,907 | 0 | 0 | |
|
Stevens CO Pud Deer Lake Stevens County |
2,884 | 1 | 0 | |
|
Western State Hospital Pierce County |
2,857 | 1 | 0 | |
|
Desert Aire Owner Assn Grant County |
2,856 | 0 | 0 | |
|
Battle Ground High and Lewisville E Clark County |
2,835 | 0 | 0 | |
|
McCormick Woods Kitsap County |
2,760 | 0 | 0 | |
|
West Sequim Bay INC Clallam County |
2,759 | 2 | 0 | |
|
Ilwaco Water Department City of Pacific County |
2,757 | 0 | 0 | |
|
McCleary City of Grays Harbor County |
2,753 | 0 | 0 | |
|
Gold Bar City of Snohomish County |
2,745 | 1 | 0 | |
|
Kettle Falls Water Dept Stevens County |
2,698 | 1 | 0 | |
|
Surfside Homeowners Pacific County |
2,687 | 2 | 0 | |
|
Olympic Mall Pierce County |
2,681 | 0 | 0 | |
|
Columbia Valley Water District Whatcom County |
2,648 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
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. Retrieved from ECHO on Oct 11, 2026.