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).
This page only lists water-sewer special purpose districts that are independent entities governed by a separately elected board of commissioners. It does not list city-owned water/sewer utilities such as Seattle Public Utilities.
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: February 23, 2024
