Tapcensus

Water quality for ZIP code 98178

ZIP 98178 covers Bryn Mawr-Skyway, Seattle, Tukwila, and Renton in King County, Washington, one of 86 ZIP codes in the county. 217 active public water systems serve the county; 86 had an EPA violation in the past three years.

Most likely your provider

Skyway Water & Sewer WA5338800 · Community water system · Surface water purchased
Serves 12,036 people Rules violated, past 3 years 0 Last sanitary survey Oct 18, 2022 Distance 0.4 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
Tukwila Water Department
 36,298 0 2.2 mi
Renton City of
 108,091 0 2.5 mi
King County Water District #125
 21,904 1 2.9 mi
King County Water District #20
 48,469 0 3.6 mi
Maplewood Addition Water Coop
 435 0 4.4 mi
Mercer Island City of
 31,057 0 4.5 mi
Coal Creek Utility District
 15,989 0 4.6 mi
King County Water District #49
 23,492 0 5.3 mi
King County Water District #117
 95 0 6.1 mi
Soos Creek Water & Sewer District
 74,172 0 6.2 mi
Valley View Mobile Park LLC
 126 0 6.3 mi
Beaux Arts Water Department
 345 1 6.3 mi
Mountain View Water District INC
 91 2 6.3 mi
Highline Water District
 100,170 0 6.6 mi
King County Water District NO 90
 20,100 1 6.9 mi
King County Water District #54
 5,373 0 7.5 mi
Kent Water Department
 166,421 1 7.8 mi
Edgehill Water Assn
 109 2 8.1 mi
Bellevue City of
 321,349 0 8.2 mi
Seattle Public Utilities
 1,161,961 0 9.7 mi
Issaquah Water System
 43,584 0 9.7 mi
Cedar Mountain Homeowners Assoc
 106 1 9.8 mi
Four Creeks Ranch Water System
 150 1 9.9 mi
Heights Water
 2,051 1 10.1 mi
Issaquah Valley Water Assn #1
 80 1 10.1 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
Rainier Christian School
 150 1 1
Cougar Mtn. Park WT Supply Sys.
 25 0 0
Cougar / Squak Corridor
 4 0 0
Valleyview Christian Church
 88 0 0
Cedar Grove Composting Water System
 50 2 0
Red Dog Saloon Water System
 30 0 0
Lions Memorial Youth Camp
 61 0 0
Cedar Grove Water Company
 30 1 0
Issaquah Christian Church
 42 0 0
Green Bobbie
 80 0 0
Fraternity Snoqualmie
 34 0 0
St. Sava Serbian Orthodox Church
 32 1 0
Vashon Island Golf & Country Club
 226 0 0
Camp Burton Conference Center
 39 0 0
Soos Creek Salmon Hatchery
 73 0 0
Harbor Heights Water
 25 0 0
Red Fall Quick Stop
 30 0 0
Blue Sky RV Park
 68 0 0
Sunwater Beach
 17 1 0
Paradise Cove Water System
 17 0 0
Washington Cathedral
 1,001 0 0
Camp Sealth
 62 1 0
Tall Chief Resort
 136 0 0
Morningside Farm Water System
 65 0 0
Montessori Spring Valley Supply
 121 1 0
Danner Corp
 50 0 0
Cascade View Rodger Scott Water
 25 1 0
King County Shooting Sports Park
 27 0 0
Shyne School Water System
 79 1 0
Port of Seattle/seatac Airport
 49,483 0 0
Wabash Pres. Church Supply #1
 71 0 0
Carnation Farms
 179 0 0
Flaming Geyser State Park
 1,947 0 0
Boondocks Tavern
 30 0 0
Camp River Ranch
 76 0 0
Green River Gorge Resort
 104 0 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Kanaskat-Palmer State Park
 543 0 0
Snoqualmie Valley Land Company INC
 80 1 1
Cedar Falls Supply
 184 1 0
Rio Vista
 36 0 0
Mount SI Motel
 45 0 0
Awareness Water System
 76 0 0
Rogers Group Properties I LLC
 570 1 0
MUD Mtn Dam Water System
 184 0 0
Tinkham Campground
 57 0 0
Middle Fork Campground #2
 54 0 0
Federation Forest State Park
 281 0 0
Greenwood Water Association
 12 0 0
Asahel Curtis Picnic Ground East
 80 1 0
All non-community systems
About this data

Water systems are matched to King County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.