Tapcensus

Water quality for ZIP code 98074

ZIP 98074 covers Sammamish 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

Sammamish Plateau Water & Sewer WA5340900 · Community water system · Surface water purchased
Serves 79,362 people Rules violated, past 3 years 0 Last sanitary survey Apr 16, 2025 Distance 2.0 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
NE Sammamish Sewer & Water District
 9,702 0 1.4 mi
Union Hill Water Association INC
 8,720 0 3.3 mi
Ames Lake Water Assoc INC
 3,224 1 4.4 mi
The Meadows Water System LLC
 127 0 4.9 mi
Redmond Water System City of
 163,335 0 4.9 mi
Dawnbreaker Water Association
 168 1 5.3 mi
Bellevue City of
 321,349 0 5.5 mi
Edgehill Water Assn
 109 2 5.5 mi
Issaquah Water System
 43,584 0 5.9 mi
King County Water District #117
 95 0 6.6 mi
Preston Industrial Park Water Assn
 930 0 6.9 mi
Carnation Water System City of
 2,400 1 7.4 mi
Kirkland City of
 69,243 0 7.7 mi
Beaux Arts Water Department
 345 1 7.7 mi
Fall City Water Dist. #127
 2,987 1 8.1 mi
Duvall City of
 11,050 0 8.1 mi
Coal Creek Utility District
 15,989 0 8.1 mi
Trails End
 117 0 8.2 mi
Grandview Condominiums
 679 2 8.5 mi
Woodinville Water District
 66,699 0 8.7 mi
King County Water District #123
 242 0 8.7 mi
Lake Alice Water Association
 90 0 8.9 mi
Issaquah Valley Water Assn #1
 80 1 9.1 mi
Spring Glen Association
 273 0 9.3 mi
Alpine Mobile Manor
 45 3 9.4 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
Red Fall Quick Stop
 30 0 0
Tall Chief Resort
 136 0 0
Carnation Farms
 179 0 0
Cougar Mtn. Park WT Supply Sys.
 25 0 0
Camp River Ranch
 76 0 0
Shyne School Water System
 79 1 0
Washington Cathedral
 1,001 0 0
Issaquah Christian Church
 42 0 0
Cougar / Squak Corridor
 4 0 0
Blue Sky RV Park
 68 0 0
Fraternity Snoqualmie
 34 0 0
Rio Vista
 36 0 0
Port of Seattle/seatac Airport
 49,483 0 0
Green Bobbie
 80 0 0
Cedar Grove Water Company
 30 1 0
St. Sava Serbian Orthodox Church
 32 1 0
Cedar Grove Composting Water System
 50 2 0
Awareness Water System
 76 0 0
Rainier Christian School
 150 1 1
Lions Memorial Youth Camp
 61 0 0
Red Dog Saloon Water System
 30 0 0
Snoqualmie Valley Land Company INC
 80 1 1
Mount SI Motel
 45 0 0
Cedar Falls Supply
 184 1 0
King County Shooting Sports Park
 27 0 0
Valleyview Christian Church
 88 0 0
Rogers Group Properties I LLC
 570 1 0
Rainbow Trout Club Homeowners Assoc
 30 0 0
Kanaskat-Palmer State Park
 543 0 0
Soos Creek Salmon Hatchery
 73 0 0
Green River Gorge Resort
 104 0 0
Cascade View Rodger Scott Water
 25 1 0
Boondocks Tavern
 30 0 0
Middle Fork Campground #2
 54 0 0
Flaming Geyser State Park
 1,947 0 0
Vashon Island Golf & Country Club
 226 0 0
Camp Burton Conference Center
 39 0 0
Wabash Pres. Church Supply #1
 71 0 0
Danner Corp
 50 0 0
Harbor Heights Water
 25 0 0
Tinkham Campground
 57 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
Money Creek Campground
 61 0 0
Asahel Curtis Picnic Ground East
 80 1 0
Asahel Curtis Picnic Ground West
 80 1 0
Denny Creek Campground
 155 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.