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Water and Sewer Districts Listed by County


This page lists water-sewer districts within Washington State, by county, with a brief description (where available), and notes about services areas, mergers and dissolutions. WASWD members are designated by an asterisk (*) and are current as of January 2014.

This information comes from various sources, including Drinking Water System Data - Washington State Department of Health, Office of Drinking Water, and Washington Association of Sewer & Water Districts (WASWD).


List of Water and Sewer Districts by County

Water-Sewer Districts Date Established Notes
Adams County
Adams County Water District No. 1    
Asotin County
Benton County
Benton County Well Water District    
Plymouth Water District    
County View Water/Sewer District   Formerly Poplar Heights Sewer District
Tri City Estates Water District No. 45    
Chelan County
Alpine Water District November 1999  
Bear Mountain Water District October 2005  
Chelan Falls Water District    
Lake Chelan Sewer District    
Lake Wenatchee Water District* May 2006  
Malaga Water District 1994  
Manson Sewer District 1953 Dissolved 1979
Peshastin Water District November 1999  
Stevens Pass Sewer District 24-J *    
Three Lakes Water District 1978  
Clallam County
Black Diamond Water District    
Sunland Water District* 1977  
Clark County
Clark Regional Wastewater District* 1958 Formerly Hazel Dell Sewer District
Columbia County
Cowlitz County
Beacon Hill Water and Sewer District* June 1959  
Douglas County
Corral Springs Water District    
Douglas County Sewer District No. 1    
East Wenatchee Water District*  1926  
Greater Bar Water District    
Ferry County
Curlew Lake Sewer District    
Curlew Water and Sewer District    
Inchelium Water District (Water and sewer services)    
Franklin County
Basin City Water-Sewer District 2004  
Garfield County
Grant County
Cascade Valley Water District   No Activity Since 1999
Crescent Bar Sewer District   No Activity Since 2005
Beverly Water District    
Royal Camp Water District   No Activity Since 1997
Grays Harbor County
Grays Harbor County Sewer District No. 1    
Grays Harbor County Sewer District No. 6    
Grays Harbor County Water District No. 1 1946  
Grays Harbor County Water District No. 2* 1952  
Grays Harbor County Water District No. 3   Assumed by Ocean Shores 1975
Grays Harbor County Water District No. 5   Dissolved 1993
Grays Harbor County Water District No. 7   Dissolved 1999
Assumed by county
Island County
Admiral's Cove Water District* 1992  
Bayview Beach Water District *    
Camano Vista Water District 1988  
Clinton Water District* 1945  
Crockett Lake Water District*    
Freeland Water and Sewer District* 1964 Formerly Freeland Water District
Holmes Harbor Sewer District* 1976  
Juniper Beach Water District*    
Lagoon Point Water District 1960s  
Ledgewood Beach Water District 1981  
Long Beach Water District    
Main Street Sewer District 2001  
North Whidbey Water District    
Penn Cove Park Water and Sewer District*   Merger of Penn Cove Park Sewer District and Penn Cove Park Water District (2000)
Rhodena Beach Water District    
Saratoga Water District    
Scatchet Head Water District* 1982  
Scatchet Head Sewer District 2019  
Swantown Water District*    
Jefferson County
Jefferson County Water District No. 1 - Paradise Bay    
Jefferson County Water District No. 2 - Brinnon    
Jefferson County Water District No. 3 - Coyle    
King County
Cedar River Water and Sewer District* (King County Water and Sewer District No. 108)    
Coal Creek Utility District*   History
Covington Water District 1960 Name change 1988
Eastgate Sewer District Assumed by Bellevue 1994
Dissolved 1995 1995
 
Fall City Water District*    
Highlands Sewer District* 1968  
Highline Water District* 1946 Formerly King County Water District No. 75
King County Water District No. 1    
King County Water District No. 17   Assumed by Bellevue November 1998
King County Water District No. 19* 1952  
King County Water District No. 20 1925 Merged with King County Water District No. 85 April 2003; District 45 merged into District 20 in 2019
King County Water District No. 49*    
King County Water District No. 54* 1939  
King County Water District No. 85    Merged with King County Water District No. 20 April 2003
King County Water District No. 87    
King County Water District No. 90* 1952  
King County Water District No. 94   Merged with Covington Water District November 2000
King County Water District No. 111* 1960s  
King County Water District No. 117*    
King County Water District No. 119* 1965  
King County Water District No. 123    
King County Water District No. 125*    
Lake Forest Park Water District*  1948. Formerly King County Water District No. 83
Name change March 2000
Lakehaven Water & Sewer District* 1956 History
Midway Sewer District* 1946  
Northeast Sammamish Sewer and Water District* 1969 Formerly Sahalee Sewer District
Northshore Utility District* 1947
 
Formerly King County Water District No. 79
Merged with Northeast Lake Washington Sewer District 1979
Name change 1992
North City Water District* 1931 Formerly King County Water District No. 42; name change 1991
Formerly Shoreline Water District; name change 2014
Ronald Wastewater District* 1951 Formerly Shoreline Wastewater Management District
Rose Hill Water District   Assumed by Kirkland, Bellevue and Redmond January 1994
Roxbury Heights Sewer District 1944 Assumed by Seattle 1956
Sammamish Plateau Water and Sewer District* 1948 History
Skyway Water and Sewer District*   Merged with Bryn Mawr-Lakeridge Water and Sewer 1999
Snoqualmie Pass Utility District   Consolidation of King County Summit Sewer District and Kittitas County Sewer District No. 1 into Snoqualmie Pass Sewer District of King and Kittitas Counties; name change 1994
Soos Creek Water and Sewer District* - Provides water and sewer services to about customers in southeast King County. Five-member board of commissioners. (Listed as KCWD 996 by KC Assessor)
1938
Formerly King County Water District No. 58 
Merged with Cascade Sewer District 1987.
Southwest Suburban Sewer District* 1945  
Stevens Pass Sewer District No. 1    
Valley View Sewer District*   Formerly Val Vue Sewer District 2007
Vashon Sewer District*    
Woodinville Water District  1959 Formerly King County Water District No. 104
Kitsap County
Annapolis Water District No. 1   Consolidation with Karcher Creek Sewer District No. 5 to form West Sound Utility District (2007)
Crystal Springs Water District No. 3   Consolidation with Annapolis Water District No. 1 to form West Sound Utility District (2007)
Karcher Creek Sewer District No. 5    
Kitsap County Sewer District No. 7*    
Manchester Water District No. 11 1942  
North Perry Avenue Water District * 1942  
Rocky Point Water District No. 12    
Silverdale Water District No. 16* 1929  
South Bainbridge Island Water District No. 18   Dissolved 1997
Sunnyslope Water District No. 15 1952  
Tracyton Water District No. 17   Dissolved June 2006
West Hill Water District No. 20    
West Sound Utility District No. 1*   Consolidation of Annapolis Water District No. 1 and Karcher Sewer District No. 5 2007
Kittitas County
Snoqualmie Pass Utility District   Consolidation of King County Summit Sewer District and Kittitas County Sewer District No. 1 into Snoqualmie Pass Sewer District of King and Kittitas Counties; name change 1994
Kittitas County Water District No. 2    
Kittitas County Water District No. 3    
Kittitas County Water District No. 4    
Kittitas County Water District No. 5*    
Kittitas County Water District No. 6*    
Kittitas County Water District No. 7*    
Klickitat County
Dallesport Water District* August 2009  
Lewis County
Lewis County Sewer District No. 1    
Lewis County Water District No. 1    
Lewis County Water District No. 2    
Lewis County Water District No. 3 1974  
Lewis County Water-Sewer District No. 4*    
Lewis County Water-Sewer District No. 5 1995  
Lewis County Water-Sewer District No. 6    
Lincoln County
Lakeview Sewer District No. 1    
Mason County
Belfair Water District No. 1*    
Hartstene Point Water-Sewer District* May 2008  
Maggie Lake Water District No. 3* 1979  
Tahuya River Valley Water District    
Trails End Water District 2    
Okanogan County
Lake Osoyoos Water District    
Pacific County
Chinook Water District*    
North Beach Water District* February 2008;  
Seaview Sewer District    
Willapa Valley Water District    
Pend Oreille County
Chippewa Water and Sewer District    
Diamond Lake Water and Sewer District    
Lenora Water and Sewer District 1991  
Ponderay Shores Water and Sewer District    
Sacheen Lake Water and Sewer District    
Pierce County
Ashford Water District 1978  
Burnett Water District    
Clear Lake Water District May 1992  
Crystal Mountain Sewer District* 1980s  
East Gig Harbor Water District* - Enacted by Pierce County Resolution R2001-193 in 2000, election held May 2002. 2002  
Elbe Water and Sewer District    
Elkhorn Water District    
Kapowsin Water District    
Kopachuck Ridge Estates Water District    
Lakewood Water District* 1943  
McKenna Water District    
Park Junction Water-Sewer District 2006  
Valley Water District* 1993  
Webstone Water District   Dissolved 2002
Whiteman's Cove Water District Dissolved 2001  
Wollochet Harbor Sewer District 1994  
San Juan County
Cape San Juan Water District - The Cape San Juan community established the CSJ Water District in 1982. Three-member board of commissioners. 1982  
Cattle Point Water District    
Eastsound Sewer and Water District*    
Fisherman Bay Sewer District* 1974  
MacKaye Harbor Water District 2015  
Skagit County
Alger Water District February 2006 Dissolved 2001
Skagit County Sewer District No. 1*    
Skagit County Sewer District No. 2*    
Skagit County Sewer District No. 3   Dissolved June 2001
Skagit County Sewer District No. 4    
Skagit County Water District No. 1    
Skamania County
Home Valley Water District 1 June 1980  
Snohomish County
Alderwood Water and Wastewater District*    
Blue Spruce Water District   Dissolved October 1998
Cross Valley Water District*    
Highland Water District April 1998  
Lake Stevens Sewer District* 1957 History
Mukilteo Water and Wastewater District* 1920 Oldest active district in the state
Olympic View Water and Sewer District No. 1 1937  
Olympus Terrace Sewer District 1969 Merged with Mukilteo Water District November 2007
Silver Lake Water and Sewer District* 1934  
Startup Water District *    
Spokane County
Chattaroy Springs West Water District No. 11    
East Spokane Water District No. 1 1917  
Four Lakes Water District No. 10    
Hangman Hills Water District No. 15    
Irvin Water District No. 6    
Liberty Lake Sewer and Water District No. 1 1973  
Spokane County Water District No. 3 1986  
Spokane County Water District No. 14    
Strathview Water District No. 16    
Valley of the Horses Water District No. 12    
Vel View Water District No. 13    
Whitworth Water District No. 2* 1939 Merged with Colbert Water District 1984
Williams Lake Sewer District No. 2    
Stevens County
Hunters Water District*    
Loon Lake Sewer District No. 1    
Loon Lake Sewer District No. 2    
Loon Lake Sewer District No 4    
Thurston County
Wahkiakum County
Skamokawa Water and Sewer*    
Walla Walla County
Artesia Water District No. 8*    
Burbank Water District No. 4    
Sun Harbor Water District No. 3    
Wallula Water District No. 1    
Touchet Water District No. 2    
Whatcom County
Whatcom County Water District No. 2    
Point Roberts Water District No. 4    
Whatcom County Water District No. 7*    
Birch Bay Water and Sewer District No. 8*    
Lake Whatcom Water and Sewer District* 1968  
Samish Water District*   Formerly Whatcom County Water District No. 12
Name change March 2001
Whatcom County Water and Sewer District No. 13*    
Glacier Water District No. 14*    
Whatcom County Water District No. 18    
Columbia Valley Water District*   Formerly Evergreen Water-Sewer District No. 19
Name change 2010
Whitman County
Steptoe Sewer and Water District No. 1    
Yakima County
Cowiche Sewer District Late 1950s  
Terrace Heights Sewer District*    

Last Modified: August 30, 2021