Tapcensus

All water systems in Washington

4,692 systems

SystemServesStatusRules violated, 3 yrUnresolved
Seattle Public Utilities
King County 		1,161,961 0 0
Tacoma Water Division City of
Pierce County 		446,245 0 0
Vancouver City of
Clark County 		373,047 0 0
Spokane City of
Spokane County 		346,138 0 0
Bellevue City of
King County 		321,349 0 0
Alderwood Water District
Snohomish County 		245,715 0 0
Everett Public Works Dept. City of
Snohomish County 		215,774 0 0
Kent Water Department
King County 		166,421 1 0
Redmond Water System City of
King County 		163,335 0 0
Clark Public Utilities
Clark County 		153,526 0 0
Lakehaven Water and Sewer District
King County 		148,809 0 0
Bellingham-Water Division City of
Whatcom County 		141,127 0 0
Olympia City of
Thurston County 		126,966 1 0
Kennewick City of
Benton County 		118,164 0 0
Pasco Water Department
Franklin County 		115,102 2 0
Yakima Water Division City of
Yakima County 		112,858 1 0
Skagit County Pud 1 Judy Res
Skagit County 		111,415 2 0
Renton City of
King County 		108,091 0 0
Auburn City of
King County 		107,655 1 0
Richland City of
Benton County 		106,499 0 0
Lacey Water Department
Thurston County 		105,178 1 0
Highline Water District
King County 		100,170 0 0
Northshore Utility District
King County 		99,789 0 0
Puyallup City of
Pierce County 		94,520 0 0
Marysville Utilities
Snohomish County 		88,582 1 0
Lakewood Water District
Pierce County 		82,425 0 0
Sammamish Plateau Water & Sewer
King County 		79,362 0 0
Soos Creek Water & Sewer District
King County 		74,172 0 0
Bremerton City of
Kitsap County 		72,951 0 0
Kirkland City of
King County 		69,243 0 0
Lynnwood City of
Snohomish County 		68,204 0 0
Sno Pud 1 Lake Stevens
Snohomish County 		67,710 1 0
Woodinville Water District
King County 		66,699 0 0
Silver Lake Water & Sewer District
Snohomish County 		65,033 0 0
Southwood
Pierce County 		64,155 0 0
Longview Water Department
Cowlitz County 		57,617 1 0
Covington Water District
King County 		56,172 0 0
Tumwater City of
Thurston County 		51,924 0 0
Port of Seattle/seatac Airport
King County 		49,483 0 0
King County Water District #20
King County 		48,469 0 0
Wenatchee City of
Chelan County 		43,690 0 0
Issaquah Water System
King County 		43,584 0 0
Bonney Lake Water Department City
Pierce County 		43,371 1 0
Walla Walla Water Division
Walla Walla County 		42,959 1 0
Nob Hill Water Association
Yakima County 		38,050 0 0
Tukwila Water Department
King County 		36,298 0 0
Firgrove Mutual INC
Pierce County 		36,168 0 0
Jblm Lewis
Pierce County 		35,414 0 0
Silverdale Water Dist 16
Kitsap County 		35,163 0 0
Spanaway Water Company
Pierce County 		34,506 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.