Tapcensus

Water quality for ZIP code 98038

ZIP 98038 covers Hobart, Maple Valley, Shadow Lake, East Renton Highlands, Mirrormont, and Kent 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

Cedar River Water & Sewer District WA5341800 · Community water system · Surface water purchased
Serves 28,671 people Rules violated, past 3 years 0 Last sanitary survey Dec 4, 2025 Distance 4.0 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
Stone Creek Estates Water Assn.
 62 1 2.1 mi
Mirrormont
 2,083 0 3.3 mi
Orchard Grove
 86 0 3.6 mi
Mazama Woods
 45 1 3.6 mi
Four Lakes
 212 0 3.8 mi
Cristalina
 225 0 4.3 mi
Evergreen Water & Improvement Assn
 150 1 4.4 mi
Ravensdale Water Supply
 389 1 4.5 mi
Cedar Mountain Homeowners Assoc
 106 1 4.7 mi
Twenty-Three 800 Tiger Mountain
 129 0 5.0 mi
Foothills Water Association
 271 0 5.1 mi
Four Creeks Ranch Water System
 150 1 5.4 mi
Noble Woods Water System
 37 0 5.5 mi
Issaquah Valley Water Assn #1
 80 1 6.0 mi
Upper Preston Water Assn
 150 0 6.2 mi
Sawyerwood Estates Water System
 46 0 6.7 mi
Alpine Mobile Manor
 45 3 6.8 mi
Mariani Water System INC
 138 0 7.1 mi
King County Water District #123
 242 0 7.4 mi
Sugarloaf Water System
 468 0 7.5 mi
Black Diamond Water Dept
 6,407 0 7.8 mi
Covington Water District
 56,172 0 7.8 mi
King County Water District NO 90
 20,100 1 8.0 mi
Preston Industrial Park Water Assn
 930 0 8.0 mi
Valley View Mobile Park LLC
 126 0 8.2 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
King County Shooting Sports Park
 27 0 0
St. Sava Serbian Orthodox Church
 32 1 0
Lions Memorial Youth Camp
 61 0 0
Cedar Grove Water Company
 30 1 0
Green Bobbie
 80 0 0
Red Dog Saloon Water System
 30 0 0
Cedar Grove Composting Water System
 50 2 0
Fraternity Snoqualmie
 34 0 0
Issaquah Christian Church
 42 0 0
Blue Sky RV Park
 68 0 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Kanaskat-Palmer State Park
 543 0 0
Rainier Christian School
 150 1 1
Cedar Falls Supply
 184 1 0
Green River Gorge Resort
 104 0 0
Cougar / Squak Corridor
 4 0 0
Boondocks Tavern
 30 0 0
Port of Seattle/seatac Airport
 49,483 0 0
Snoqualmie Valley Land Company INC
 80 1 1
Mount SI Motel
 45 0 0
Flaming Geyser State Park
 1,947 0 0
Cascade View Rodger Scott Water
 25 1 0
Valleyview Christian Church
 88 0 0
Cougar Mtn. Park WT Supply Sys.
 25 0 0
Rogers Group Properties I LLC
 570 1 0
Tall Chief Resort
 136 0 0
Soos Creek Salmon Hatchery
 73 0 0
Wabash Pres. Church Supply #1
 71 0 0
Red Fall Quick Stop
 30 0 0
Camp River Ranch
 76 0 0
Danner Corp
 50 0 0
Carnation Farms
 179 0 0
Rio Vista
 36 0 0
Tinkham Campground
 57 0 0
MUD Mtn Dam Water System
 184 0 0
Montessori Spring Valley Supply
 121 1 0
Middle Fork Campground #2
 54 0 0
Washington Cathedral
 1,001 0 0
Shyne School Water System
 79 1 0
Federation Forest State Park
 281 0 0
Vashon Island Golf & Country Club
 226 0 0
Asahel Curtis Picnic Ground East
 80 1 0
Asahel Curtis Picnic Ground West
 80 1 0
Camp Burton Conference Center
 39 0 0
Greenwood Water Association
 12 0 0
Denny Creek Campground
 155 0 0
Awareness Water System
 76 0 0
Harbor Heights Water
 25 0 0
Morningside Farm Water System
 65 0 0
Paradise Cove Water System
 17 0 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.