Tapcensus

Water quality in Newcastle, Washington

Newcastle 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

Coal Creek Utility District WA5341750 · Community water system · Surface water purchased
Serves 15,989 people Rules violated, past 3 years 0 Last sanitary survey Jun 30, 2022 Distance 0.5 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
King County Water District #117
 95 0 1.9 mi
Mercer Island City of
 31,057 0 3.5 mi
Edgehill Water Assn
 109 2 3.8 mi
Renton City of
 108,091 0 4.0 mi
Beaux Arts Water Department
 345 1 4.0 mi
Skyway Water & Sewer
 12,036 0 4.2 mi
Maplewood Addition Water Coop
 435 0 4.4 mi
King County Water District NO 90
 20,100 1 4.5 mi
Bellevue City of
 321,349 0 4.8 mi
Valley View Mobile Park LLC
 126 0 5.2 mi
Issaquah Water System
 43,584 0 5.6 mi
Tukwila Water Department
 36,298 0 6.2 mi
The Meadows Water System LLC
 127 0 6.4 mi
Issaquah Valley Water Assn #1
 80 1 7.0 mi
Four Creeks Ranch Water System
 150 1 7.1 mi
King County Water District #125
 21,904 1 7.2 mi
Soos Creek Water & Sewer District
 74,172 0 7.5 mi
Twenty-Three 800 Tiger Mountain
 129 0 7.6 mi
King County Water District #20
 48,469 0 7.8 mi
Cedar Mountain Homeowners Assoc
 106 1 7.9 mi
Grandview Condominiums
 679 2 8.3 mi
Trails End
 117 0 8.4 mi
Mountain View Water District INC
 91 2 8.4 mi
Four Lakes
 212 0 8.6 mi
Sammamish Plateau Water & Sewer
 79,362 0 8.7 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
Cougar Mtn. Park WT Supply Sys.
 25 0 0
Cougar / Squak Corridor
 4 0 0
Rainier Christian School
 150 1 1
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
St. Sava Serbian Orthodox Church
 32 1 0
Red Dog Saloon Water System
 30 0 0
Lions Memorial Youth Camp
 61 0 0
Red Fall Quick Stop
 30 0 0
Blue Sky RV Park
 68 0 0
Valleyview Christian Church
 88 0 0
Tall Chief Resort
 136 0 0
Washington Cathedral
 1,001 0 0
Port of Seattle/seatac Airport
 49,483 0 0
Shyne School Water System
 79 1 0
Carnation Farms
 179 0 0
Camp River Ranch
 76 0 0
Soos Creek Salmon Hatchery
 73 0 0
King County Shooting Sports Park
 27 0 0
Vashon Island Golf & Country Club
 226 0 0
Camp Burton Conference Center
 39 0 0
Snoqualmie Valley Land Company INC
 80 1 1
Cascade View Rodger Scott Water
 25 1 0
Rio Vista
 36 0 0
Danner Corp
 50 0 0
Boondocks Tavern
 30 0 0
Flaming Geyser State Park
 1,947 0 0
Harbor Heights Water
 25 0 0
Green River Gorge Resort
 104 0 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Cedar Falls Supply
 184 1 0
Kanaskat-Palmer State Park
 543 0 0
Mount SI Motel
 45 0 0
Wabash Pres. Church Supply #1
 71 0 0
Montessori Spring Valley Supply
 121 1 0
Sunwater Beach
 17 1 0
Paradise Cove Water System
 17 0 0
Camp Sealth
 62 1 0
Morningside Farm Water System
 65 0 0
Awareness Water System
 76 0 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 Newcastle 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.