Tapcensus

Water quality for ZIP code 98010

ZIP 98010 covers Black Diamond, Lake Morton-Berrydale, and Maple Valley 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

Black Diamond Water Dept WA5307220 · Community water system · Ground water
Serves 6,407 people Rules violated, past 3 years 0 Last sanitary survey Jan 4, 2023 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
Sawyerwood Estates Water System
 46 0 2.1 mi
Sugarloaf Water System
 468 0 2.5 mi
Diamond Springs Water Association
 138 0 3.0 mi
Ravensdale Water Supply
 389 1 3.2 mi
Covington Water District
 56,172 0 3.5 mi
Walczak 620
 256 0 3.6 mi
Cherokee Bay Community Club INC
 2,400 1 3.9 mi
Cumberland Coop Water System
 210 0 3.9 mi
New Arcadia Water System
 40 1 4.2 mi
Remolif Addition
 76 2 4.3 mi
Skyland Park Water Association
 47 1 4.3 mi
Cristalina
 225 0 4.7 mi
Sawyerwood Water System
 32 0 5.0 mi
Mariani Water System INC
 138 0 5.0 mi
Evergreen Water & Improvement Assn
 150 1 5.2 mi
Rumbolz Sunset Water System
 106 2 5.4 mi
Orchard Grove
 86 0 5.5 mi
Welchs Water Association
 69 1 6.8 mi
Enumclaw Water Department
 23,276 0 6.9 mi
Stone Creek Estates Water Assn.
 62 1 7.0 mi
Foothills Water Association
 271 0 7.3 mi
Cedar River Water & Sewer District
 28,671 0 7.6 mi
Lake Meridian Water District
 24,231 1 8.1 mi
Derbyshire Scenic Acres
 156 0 8.9 mi
Hazelwood Heights
 85 2 9.3 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
Boondocks Tavern
 30 0 0
Green River Gorge Resort
 104 0 0
Flaming Geyser State Park
 1,947 0 0
Cascade View Rodger Scott Water
 25 1 0
Kanaskat-Palmer State Park
 543 0 0
King County Shooting Sports Park
 27 0 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Wabash Pres. Church Supply #1
 71 0 0
Soos Creek Salmon Hatchery
 73 0 0
Red Dog Saloon Water System
 30 0 0
Lions Memorial Youth Camp
 61 0 0
Valleyview Christian Church
 88 0 0
Cedar Grove Composting Water System
 50 2 0
St. Sava Serbian Orthodox Church
 32 1 0
Rainier Christian School
 150 1 1
Danner Corp
 50 0 0
Cedar Grove Water Company
 30 1 0
Green Bobbie
 80 0 0
Fraternity Snoqualmie
 34 0 0
MUD Mtn Dam Water System
 184 0 0
Cedar Falls Supply
 184 1 0
Issaquah Christian Church
 42 0 0
Cougar / Squak Corridor
 4 0 0
Blue Sky RV Park
 68 0 0
Montessori Spring Valley Supply
 121 1 0
Mount SI Motel
 45 0 0
Snoqualmie Valley Land Company INC
 80 1 1
Cougar Mtn. Park WT Supply Sys.
 25 0 0
Port of Seattle/seatac Airport
 49,483 0 0
Rogers Group Properties I LLC
 570 1 0
Federation Forest State Park
 281 0 0
Greenwood Water Association
 12 0 0
Tall Chief Resort
 136 0 0
Vashon Island Golf & Country Club
 226 0 0
Tinkham Campground
 57 0 0
Camp Burton Conference Center
 39 0 0
Red Fall Quick Stop
 30 0 0
Camp River Ranch
 76 0 0
Harbor Heights Water
 25 0 0
Morningside Farm Water System
 65 0 0
Paradise Cove Water System
 17 0 0
Camp Sealth
 62 1 0
Sunwater Beach
 17 1 0
Carnation Farms
 179 0 0
Asahel Curtis Picnic Ground East
 80 1 0
Asahel Curtis Picnic Ground West
 80 1 0
Rio Vista
 36 0 0
Middle Fork Campground #2
 54 0 0
Denny Creek Campground
 155 0 0
Washington Cathedral
 1,001 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.