Tapcensus

Water quality in Maple Valley, Washington

Maple Valley 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

Covington Water District WA5341650 · Community water system · Surface water purchased
Serves 56,172 people Rules violated, past 3 years 0 Last sanitary survey Oct 2, 2024 Distance 2.7 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
Orchard Grove
 86 0 1.7 mi
Sawyerwood Estates Water System
 46 0 2.2 mi
Ravensdale Water Supply
 389 1 2.7 mi
Cedar River Water & Sewer District
 28,671 0 3.5 mi
Stone Creek Estates Water Assn.
 62 1 3.5 mi
Black Diamond Water Dept
 6,407 0 4.0 mi
Cristalina
 225 0 5.0 mi
Welchs Water Association
 69 1 5.0 mi
Diamond Springs Water Association
 138 0 5.2 mi
Evergreen Water & Improvement Assn
 150 1 5.5 mi
Sugarloaf Water System
 468 0 5.6 mi
Cedar Mountain Homeowners Assoc
 106 1 5.7 mi
Mazama Woods
 45 1 5.7 mi
Lake Meridian Water District
 24,231 1 5.8 mi
Four Lakes
 212 0 6.1 mi
Mirrormont
 2,083 0 6.7 mi
Derbyshire Scenic Acres
 156 0 7.1 mi
Mariani Water System INC
 138 0 7.1 mi
Walczak 620
 256 0 7.3 mi
Twenty-Three 800 Tiger Mountain
 129 0 7.4 mi
Soos Creek Water & Sewer District
 74,172 0 7.6 mi
Foothills Water Association
 271 0 7.6 mi
Cumberland Coop Water System
 210 0 7.6 mi
Four Creeks Ranch Water System
 150 1 7.7 mi
Valley View Mobile Park LLC
 126 0 7.8 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
King County Shooting Sports Park
 27 0 0
Red Dog Saloon Water System
 30 0 0
Lions Memorial Youth Camp
 61 0 0
Cascade View Rodger Scott Water
 25 1 0
Boondocks Tavern
 30 0 0
Green River Gorge Resort
 104 0 0
Flaming Geyser State Park
 1,947 0 0
Cedar Grove Composting Water System
 50 2 0
Valleyview Christian Church
 88 0 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Kanaskat-Palmer State Park
 543 0 0
Rainier Christian School
 150 1 1
St. Sava Serbian Orthodox Church
 32 1 0
Cedar Grove Water Company
 30 1 0
Soos Creek Salmon Hatchery
 73 0 0
Green Bobbie
 80 0 0
Wabash Pres. Church Supply #1
 71 0 0
Fraternity Snoqualmie
 34 0 0
Issaquah Christian Church
 42 0 0
Cougar / Squak Corridor
 4 0 0
Danner Corp
 50 0 0
Blue Sky RV Park
 68 0 0
Cedar Falls Supply
 184 1 0
Cougar Mtn. Park WT Supply Sys.
 25 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
Montessori Spring Valley Supply
 121 1 0
Rogers Group Properties I LLC
 570 1 0
MUD Mtn Dam Water System
 184 0 0
Tall Chief Resort
 136 0 0
Vashon Island Golf & Country Club
 226 0 0
Red Fall Quick Stop
 30 0 0
Camp Burton Conference Center
 39 0 0
Camp River Ranch
 76 0 0
Harbor Heights Water
 25 0 0
Morningside Farm Water System
 65 0 0
Carnation Farms
 179 0 0
Federation Forest State Park
 281 0 0
Paradise Cove Water System
 17 0 0
Sunwater Beach
 17 1 0
Tinkham Campground
 57 0 0
Camp Sealth
 62 1 0
Rio Vista
 36 0 0
Greenwood Water Association
 12 0 0
Washington Cathedral
 1,001 0 0
Shyne School Water System
 79 1 0
Middle Fork Campground #2
 54 0 0
Asahel Curtis Picnic Ground East
 80 1 0
Asahel Curtis Picnic Ground West
 80 1 0
All non-community systems
About this data

Water systems are matched to King County, nearest to Maple Valley 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.