Tapcensus

Water quality in Seattle, Washington

Seattle is in King County. 217 active public water systems serve the county; 86 had an EPA violation in the past three years.

Most likely your provider

Seattle Public Utilities WA5377050 · Community water system · Surface water
Serves 1,161,961 people Rules violated, past 3 years 0 Last sanitary survey Jul 28, 2025 Distance 0.9 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in King County

155 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Grandview Condominiums
 679 2 6.3 mi
Trails End
 117 0 6.6 mi
Mercer Island City of
 31,057 0 7.0 mi
Beaux Arts Water Department
 345 1 7.4 mi
Highlands Utility District
 275 0 8.5 mi
Kirkland City of
 69,243 0 8.7 mi
King County Water District #20
 48,469 0 8.9 mi
Bellevue City of
 321,349 0 9.2 mi
North City Water District
 32,847 0 9.7 mi
Northshore Utility District
 99,789 0 10.0 mi
Skyway Water & Sewer
 12,036 0 10.0 mi
Coal Creek Utility District
 15,989 0 10.2 mi
Lake Forest Park Water District
 3,171 0 10.3 mi
King County Water District #125
 21,904 1 10.5 mi
King County Water District #117
 95 0 10.7 mi
Heights Water
 2,051 1 10.8 mi
King County Water District #49
 23,492 0 11.1 mi
Tukwila Water Department
 36,298 0 11.2 mi
Renton City of
 108,091 0 12.0 mi
Bothell Water City of
 33,643 1 12.4 mi
Redmond Water System City of
 163,335 0 12.4 mi
Westside Water Assn
 562 1 12.5 mi
Edgehill Water Assn
 109 2 13.2 mi
Maplewood Addition Water Coop
 435 0 13.6 mi
NE Sammamish Sewer & Water District
 9,702 0 13.8 mi
All 156 community water systems in King County
Non-community systems in King County (61: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Washington Cathedral
 1,001 0 0
Cougar Mtn. Park WT Supply Sys.
 25 0 0
Shyne School Water System
 79 1 0
Cougar / Squak Corridor
 4 0 0
Red Fall Quick Stop
 30 0 0
Rainier Christian School
 150 1 1
Vashon Island Golf & Country Club
 226 0 0
Camp Burton Conference Center
 39 0 0
Issaquah Christian Church
 42 0 0
Cedar Grove Composting Water System
 50 2 0
Fraternity Snoqualmie
 34 0 0
Cedar Grove Water Company
 30 1 0
Green Bobbie
 80 0 0
Harbor Heights Water
 25 0 0
Sunwater Beach
 17 1 0
Red Dog Saloon Water System
 30 0 0
St. Sava Serbian Orthodox Church
 32 1 0
Lions Memorial Youth Camp
 61 0 0
Paradise Cove Water System
 17 0 0
Valleyview Christian Church
 88 0 0
Carnation Farms
 179 0 0
Camp Sealth
 62 1 0
Tall Chief Resort
 136 0 0
Morningside Farm Water System
 65 0 0
Blue Sky RV Park
 68 0 0
Camp River Ranch
 76 0 0
Port of Seattle/seatac Airport
 49,483 0 0
Awareness Water System
 76 0 0
Soos Creek Salmon Hatchery
 73 0 0
Rio Vista
 36 0 0
Montessori Spring Valley Supply
 121 1 0
Danner Corp
 50 0 0
King County Shooting Sports Park
 27 0 0
Cascade View Rodger Scott Water
 25 1 0
Snoqualmie Valley Land Company INC
 80 1 1
Wabash Pres. Church Supply #1
 71 0 0
Flaming Geyser State Park
 1,947 0 0
Boondocks Tavern
 30 0 0
Green River Gorge Resort
 104 0 0
Mount SI Motel
 45 0 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Kanaskat-Palmer State Park
 543 0 0
Cedar Falls Supply
 184 1 0
Rogers Group Properties I LLC
 570 1 0
Middle Fork Campground #2
 54 0 0
MUD Mtn Dam Water System
 184 0 0
Tinkham Campground
 57 0 0
Asahel Curtis Picnic Ground East
 80 1 0
Asahel Curtis Picnic Ground West
 80 1 0
Federation Forest State Park
 281 0 0
All non-community systems
About this data

Water systems are matched to King County, nearest to Seattle first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.

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.