What does 'people served' mean?

People served refers to the total population that receives water service from the utility. This number represents the estimated number of residents within the utility's service area.

Why are utilities listed by city?

Utilities are listed by their primary city of operation to help users find water services in their local area. Some utilities may serve multiple cities or unincorporated areas within a region.

How can I get more details about a utility?

Click on any utility name or the 'View Profile' button to access the full utility profile page, which includes detailed information, contact details, and compliance data.

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Drinking Water Utilities in Washington

Q: How many drinking water utilities are in Washington?

Washington has 132 drinking water utilities serving more than 10,000 people listed in this directory.

Browse utilities serving more than 10,000 people by location and population served.

Utilities listed

132

Total people served

7,620,378

Largest utility

Seattle Public Utilities

1,091,904 people

Coverage

100%

with population data

Washington has 132 drinking water utilities serving more than 10,000 people in this directory. The largest utility by population served is Seattle Public Utilities, serving 1,091,904 people. Utilities are listed with their city location and population served.

People Served:

01,091,904

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Utility Name	City	People Served	Action
Seattle Public Utilities	Seattle	1,091,904	View Profile
City of Tacoma	Tacoma	448,771	View Profile
City of Vancouver	Vancouver	373,047	View Profile
City of Spokane	Spokane	343,167	View Profile
City of Bellevue	Bellevue	261,506	View Profile
City of Everett Public Works Department	Everett	215,774	View Profile
Alderwood Water District	Lynnwood	197,993	View Profile
Kent Water Department	Kent	157,101	View Profile
City of Bellingham Water Division	Bellingham	135,023	View Profile
City of Redmond Water System	Redmond	123,565	View Profile
Lakehaven Utility District	Federal Way	116,906	View Profile
Clark Public Utilities	Vancouver	116,876	View Profile
Skagit County Public Utility District 1 Judy Reservoir	Mount Vernon	116,371	View Profile
Highline Water District	Kent	115,057	View Profile
City of Auburn	Auburn	113,921	View Profile
City of Olympia	Olympia	113,584	View Profile
City of Yakima Water Division	Yakima	110,598	View Profile
Pasco Water Department	Pasco	109,345	View Profile
City of Renton	Renton	107,119	View Profile
Northshore Utility District	Kenmore	104,722	View Profile
City of Richland	Richland	94,463	View Profile
City of Kennewick	Kennewick	89,224	View Profile
Lacey Water Department	Lacey	85,727	View Profile
City of Bremerton	Bremerton	72,520	View Profile
Marysville Utilities	Marysville	72,380	View Profile
City of Tumwater	Tumwater	66,373	View Profile
Sammamish Plateau Water and Sewer	Sammamish	65,598	View Profile
City of Kirkland	Kirkland	64,795	View Profile
Soos Creek Water and Sewer District	Renton	64,534	View Profile
Southwood Water System	Tacoma	64,276	View Profile
City of Lynnwood	Lynnwood	63,204	View Profile
Lakewood Water District	Lakewood	62,089	View Profile
Woodinville Water District	Woodinville	59,873	View Profile
SNO PUD 1 - Lake Stevens	Everett	59,146	View Profile
JBLM Lewis	Joint Base Lewis-mcchord	58,497	View Profile
Covington Water District	Kent	52,143	View Profile
Longview Water Department	Longview	49,111	View Profile
Tukwila Water Department	Tukwila	45,374	View Profile
Walla Walla Water Division	Walla Walla	42,959	View Profile
Issaquah Water System	Issaquah	39,578	View Profile
King County Water District #20	Seattle	38,974	View Profile
Bonney Lake Water Department	Buckley	38,307	View Profile
City of Puyallup	Puyallup	36,906	View Profile
Firgrove Mutual Inc	Puyallup	36,055	View Profile
Nob Hill Water Association	Yakima	35,785	View Profile
City of Edmonds	Edmonds	34,023	View Profile
City of Bothell Water	Bothell	32,712	View Profile
City of Moses Lake	Moses Lake	32,428	View Profile
Fife Department Of Public Works	Fife	32,380	View Profile
Camas Municipal Water Sewer System	Camas	31,794	View Profile

Showing 1 to 50 of 132 utilities

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Top Drinking Water Utilities in Washington by Population Served

Frequently Asked Questions

Definitions

People served: Total population supplied with water by the utility system.
Drinking water utility: A public water system that provides potable (safe to drink) water to residential and commercial customers through a distribution network.