Tap Truth EPA drinking water records, in plain English

County drinking water records

King County, WA drinking water systems

119 community water systems serve King County, WA, reporting 3,225,027 people served in all. A system that also serves other counties counts all of its customers here.

6 of them (5%) had at least one health-based violation in the last 10 years. 9 systems still have one unresolved.

84 rely mainly on groundwater and 35 on surface water, counting water bought from other systems.

93 systems filed a lead service line inventory listing 7 lead lines, 1,064 galvanized lines that must be replaced and 55,713 lines of unknown material.

39 more systems are placed in King County, WA by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
119
People served, sum of each system's own figure
3,225,027
Systems with a health-based violation, last 10 years
6
Systems with one unresolved
9
Lead service lines in inventories
7

Water systems serving King County

119 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Seattle Public Utilities Seattle, Shoreline and 3 more 1,161,961 Surface water 0 0 0
City of Bellevue Bellevue, Medina and 2 more 321,349 Purchased surface water 0 0 0
Kent Water Department Kent and Auburn 166,421 Purchased surface water 0 0 0
City of Redmond Water System Redmond and Union Hill-Novelty Hill 163,335 Purchased surface water 0 0 0
Lakehaven Water and Sewer District Federal Way, Lakeland South and 3 more 148,809 Purchased surface water 0 0 0
City of Renton Renton and Tukwila 108,091 Groundwater 0 0 0
City of Auburn Auburn 107,655 Groundwater 0 0 7
Highline Water District SeaTac, Des Moines and 5 more 100,170 Purchased surface water 0 0 0
Northshore Utility District Kirkland, Kenmore and 2 more 99,789 Purchased surface water 0 0 0
Sammamish Plateau Water & Sewer Sammamish, Union Hill-Novelty Hill and 1 more 79,362 Purchased surface water 0 0 0
City of Kirkland Kirkland 69,243 Purchased surface water 0 0 0
Woodinville Water District Cottage Lake, Woodinville and 2 more 66,699 Purchased surface water 0 0 0
Soos Creek Water & Sewer District Kent, Renton and 2 more 64,534 Purchased surface water 0 0 0
Covington Water District Lake Morton-Berrydale, Lake Holm and 4 more 56,172 Purchased surface water 0 0 0
Issaquah Water System Issaquah 43,584 Purchased surface water 0 0 0
King County Water District #20 Burien, Boulevard Park and 2 more 38,974 Purchased surface water 0 0 0
Tukwila Water Department Tukwila 36,298 Purchased surface water 0 0 0
City of Bothell Water Bothell 33,643 Purchased surface water 0 0 0
North City Water District Shoreline and Lake Forest Park 32,847 Purchased surface water 0 0 0
City of Mercer Island Mercer Island 31,057 Purchased surface water 0 0 0
Cedar River Water & Sewer District Hobart, Shadow Lake and 4 more 28,671 Purchased surface water 0 0 0
Lake Meridian Water District Kent, Auburn and 1 more 24,231 Purchased surface water 0 0 0
Enumclaw Water Department Enumclaw and land outside it 23,276 Groundwater 0 0 0
King County Water District #125 SeaTac and Tukwila 21,904 Purchased surface water 0 0 0
King County Water District No 90 East Renton Highlands and Renton 20,100 Purchased surface water 0 0 0
King County Water District #49 Burien and SeaTac 16,065 Purchased surface water 0 0 0
Coal Creek Utility District Newcastle, Bellevue and 1 more 15,989 Purchased surface water 0 0 0
Snoqualmie Water Snoqualmie and land outside it 15,848 Groundwater 0 0 0
Skyway Water & Sewer Bryn Mawr-Skyway 12,036 Purchased surface water 0 0 0
City of Duvall Duvall and land outside it 11,050 Purchased surface water 0 0 0
Union Hill Water Association Inc Union Hill-Novelty Hill 8,720 Groundwater 0 0 0
NE Sammamish Sewer & Water District Sammamish 8,516 Groundwater 0 0 0
City of Pacific Pacific 7,925 Groundwater 0 0 0
City of North Bend North Bend and Riverbend and land outside them 7,228 Groundwater 0 0 0
Sallal Water Association Inc Riverbend, Riverpoint and 1 more and land outside them 6,600 Groundwater 0 0 No inventory
Black Diamond Water Dept Black Diamond 6,407 Groundwater 0 0 0
Snoqualmie Pass Utility District Outside cities and towns 5,805 Groundwater 0 1 0
King County Water District #54 Des Moines 5,373 Purchased surface water 1 0 0
King County Water District 119 Lake Marcel-Stillwater and land outside it 3,800 Purchased surface water 0 0 0
Water District 19 Vashon 3,723 Surface water 2 0 0
Algona Water Dept Algona 3,300 Purchased surface water 0 0 0
Muckleshoot Auburn and land outside it 3,250 Groundwater 0 0 0
Ames Lake Water Assoc Inc Ames Lake and Union Hill-Novelty Hill and land outside them 3,224 Groundwater 0 0 No inventory
Lake Forest Park Water District Lake Forest Park 3,171 Groundwater 0 0 0
Fall City Water Dist. #127 Fall City and land outside it 2,987 Groundwater 0 0 No inventory
City of Carnation Water System Carnation and land outside it 2,400 Groundwater 0 0 0
Cherokee Bay Community Club Inc Outside cities and towns 2,400 Groundwater 0 0 0
Mirrormont Mirrormont 2,083 Groundwater 0 0 0
Heights Water Vashon 2,051 Groundwater 0 0 0
Wilderness Rim Association Wilderness Rim 1,867 Purchased groundwater 0 0 No inventory
River Bend HOA Riverbend 1,603 Groundwater 0 0 0
Dockton Water Association Vashon 992 Groundwater 0 0 0
Burton Water Cooperative Vashon 964 Groundwater 0 1 No inventory
Preston Industrial Park Water Assn Outside cities and towns 930 Groundwater 0 0 0
Grandview Condominiums Yarrow Point 679 Purchased surface water 0 0 0
Westside Water Assn Vashon 562 Groundwater 0 1 No inventory
Sugarloaf Water System Outside cities and towns 468 Groundwater 0 0 No inventory
Maplewood Addition Water Coop Renton 435 Groundwater 0 0 0
Lake Margaret Water System Outside cities and towns 406 Surface water 0 0 0
Gold Beach Water Company Vashon 390 Groundwater 0 0 0
Ravensdale Water Supply Ravensdale 389 Purchased surface water 0 0 0
Beaux Arts Water Department Beaux Arts Village 345 Groundwater 0 0 No inventory
Skykomish Water Dept Skykomish and land outside it 324 Groundwater 0 0 0
Highlands Utility District Shoreline 275 Purchased surface water 0 0 No inventory
Foothills Water Association Outside cities and towns 271 Groundwater 0 0 0
Walczak 620 Outside cities and towns 256 Groundwater 0 0 0
Spring Glen Association Outside cities and towns 245 Groundwater 0 0 No inventory
King County Water District #123 Outside cities and towns 242 Groundwater 1 0 0
Maury Mutual Water Co Vashon 233 Groundwater 0 1 0
Cristalina Outside cities and towns 225 Groundwater 0 0 0
Four Lakes Mirrormont 212 Groundwater 0 0 0
South Auburn Water Association Outside cities and towns 212 Groundwater 0 0 No inventory
Cumberland Coop Water System Outside cities and towns 210 Purchased surface water 0 0 0
Auburn Park Community LLC Auburn 202 Groundwater 0 0 0
Dawnbreaker Water Association Union Hill-Novelty Hill 168 Groundwater 0 0 0
Derbyshire Scenic Acres Auburn 156 Groundwater 0 0 0
Four Creeks Ranch Water System East Renton Highlands 150 Groundwater 0 0 0
Evergreen Water & Improvement Assn Outside cities and towns 150 Groundwater 0 0 0
Upper Preston Water Assn Outside cities and towns 150 Groundwater 0 1 0
Crestview West Water System Auburn 147 Groundwater 1 0 0
Diamond Springs Water Association Outside cities and towns 138 Groundwater 0 0 0
Mariani Water System Inc Outside cities and towns 138 Groundwater 0 0 No inventory
Twenty-Three 800 Tiger Mountain Mirrormont 129 Groundwater 0 0 0
The Meadows Water System LLC Issaquah 127 Groundwater 0 0 No inventory
Valley View Mobile Park LLC Fairwood and Maple Heights-Lake Desire and land outside them 126 Groundwater 0 0 0
Trails End Yarrow Point 117 Groundwater 0 0 0
Edgehill Water Assn Outside cities and towns 109 Groundwater 0 0 0
Riverwood Park Community Club Baring 109 Groundwater 0 0 0
Woodland Heights Cottage Lake 108 Groundwater 0 0 0
Cedar Mountain Homeowners Assoc East Renton Highlands 106 Groundwater 0 0 0
Beulah Park Community Vashon 106 Groundwater 0 0 0
Rumbolz Sunset Water System Outside cities and towns 106 Groundwater 0 0 0
King County Water District #117 Bellevue 95 Groundwater 0 0 0
Mountain View Water District Inc Kent 91 Groundwater 0 0 0
Lake Alice Water Association Outside cities and towns 90 Groundwater 0 0 0
Orchard Grove Hobart 86 Groundwater 0 0 0
Hazelwood Heights Auburn 85 Groundwater 0 0 No inventory
Sunnyslope Mutual Water System Vashon 85 Groundwater 0 1 No inventory
Prospect Point Beach Club Vashon 85 Groundwater 0 0 0
Issaquah Valley Water Assn #1 Outside cities and towns 80 Groundwater 1 0 No inventory
Remolif Addition Outside cities and towns 76 Groundwater 0 0 No inventory
Welchs Water Association Lake Morton-Berrydale 69 Groundwater 0 0 0
Stone Creek Estates Water Assn. Hobart 62 Groundwater 1 0 0
Alpine Water Association Outside cities and towns 58 Purchased groundwater 0 1 0
Fall City Water Dist.(Spring Hill) Outside cities and towns 57 Groundwater 0 0 No inventory
Chamonix Village Baring 53 Groundwater 0 0 No inventory
Timberlane Village Water Outside cities and towns 51 Groundwater 0 1 No inventory
Norwest Mobile Home Park Outside cities and towns 49 Groundwater 0 0 No inventory
Skyland Park Water Association Outside cities and towns 47 Groundwater 0 0 0
Sawyerwood Estates Water System Black Diamond 46 Groundwater 0 0 0
Alpine Mobile Manor Outside cities and towns 45 Groundwater 0 0 0
Mazama Woods Mirrormont 45 Groundwater 0 0 0
Shawnee Hill Condominium WS Vashon 44 Groundwater 0 0 No inventory
Logandale Water Assoc Inc. Outside cities and towns 42 Groundwater 0 0 No inventory
New Arcadia Water System Outside cities and towns 40 Groundwater 0 0 No inventory
Marine Estates Mutual Water Assn Vashon 38 Groundwater 0 1 No inventory
Noble Woods Water System Outside cities and towns 37 Groundwater 0 0 0
Grotto Water Association Outside cities and towns 36 Groundwater 0 0 0
Sawyerwood Water System Outside cities and towns 32 Groundwater 0 0 No inventory

Systems placed by county record in King County

39 systems

EPA has no service area map for some of these systems, and the maps it has for the others do not line up with their own records. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Echo Glen Childrens Center County on record 430 Groundwater 0 0 0
Lake Retreat Camp & Conf Center County on record 404 Groundwater 0 0 0
Riverbend Mobile Home Park County on record 343 Groundwater 0 0 No inventory
Mount Si Mobile Home Estates County on record 200 Groundwater 0 0 No inventory
Locloman Subdivision County on record 174 Groundwater 0 0 0
Lake Meridian Estates (MHP) County on record 154 Groundwater 0 0 0
Lake Tuck County on record 143 Groundwater 0 0 0
Cherry Creek County on record 138 Groundwater 1 0 0
Echo Glen Water System County on record 105 Groundwater 0 0 No inventory
Spring Glen Mobile Home Park County on record 96 Groundwater 0 0 No inventory
Rakwanna Park Water Sys Inc County on record 90 Groundwater 0 0 No inventory
Crestview Tracts #3 County on record 77 Groundwater 0 0 0
Lake Wilderness Shore Acres Estate County on record 75 Groundwater 0 0 No inventory
Luana Water Assn. County on record 74 Groundwater 0 0 0
Quartermaster Heights Water Assn County on record 70 Groundwater 0 0 0
Newaukum Water System County on record 62 Groundwater 0 0 0
Rocky Acres Water System County on record 61 Groundwater 0 0 0
Fall City Water Dist. (Plum Creek) County on record 59 Groundwater 1 0 No inventory
Maple Vista County on record 57 Groundwater 0 0 0
85 Acres County on record 55 Groundwater 0 0 0
Elderwood Water Association County on record 52 Groundwater 0 0 No inventory
Forest Grove Hills County on record 50 Groundwater 0 0 0
Needle Creek Water System County on record 50 Groundwater 1 0 0
Fall City Water Dist. (Ruth) County on record 49 Groundwater 0 0 No inventory
Green Acres Water Association County on record 44 Groundwater 0 0 0
Evergreen Sky Ranch Community Wtr County on record 43 Groundwater 0 0 No inventory
Bridle Trails South Water System County on record 42 Groundwater 0 0 No inventory
Walter Walker Water Works County on record 42 Purchased groundwater 0 0 0
Wells Water Association County on record 39 Groundwater 0 1 No inventory
Lake Retreat Firs #2 Water Assoc. County on record 38 Groundwater 0 0 0
Reed Ranch Road Water County on record 36 Groundwater 0 0 No inventory
Braunwood Estates County on record 35 Groundwater 0 0 No inventory
Ravensdale Mobile Home Park County on record 34 Groundwater 0 1 0
Billington County on record 34 Groundwater 0 0 0
Tokul Creek Community County on record 34 Groundwater 0 0 No inventory
Farrell L. E. County on record 32 Groundwater 0 0 0
Tiger Mtn Tracts County on record 30 Groundwater 0 2 No inventory
165th Ave Water System County on record 24 Groundwater 0 0 No inventory
Sunset Park Water Co County on record 21 Groundwater 4 0 0

Cities and towns in King County

62 places

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Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations