Click here to skip to main content.
scenic picture from Washington state
SUBJECTSGOVERNANCESPECIAL PURPOSE DISTRICTS › Washington Water and Sewer Districts Listed by County
Updated 09/09

Washington Water and Sewer Districts Listed by County

Information Sources are principally from State Auditor’s Reports, where published reports exist which contain a description of the district.   Other sources are district web pages and county comprehensive plans. There are some districts where no description was found.  Jurisdictions are encouraged to assist in updating this page by contacting MRSC.

Water-Sewer Districts by County   

Assumptions, Mergers, Dissolutions, Cities Served by Districts and Other Notes

Adams | Asotin | Benton | Chelan | Clallam | Clark | Columbia | Cowlitz | Douglas | Ferry Franklin |  Garfield | Grant | Grays Harbor | Island | Jefferson | King | Kitsap | Kittitas   Klickitat | Lewis | Lincoln | Mason | Okanogan | Pacific | Pend Oreille | Pierce | San Juan Skagit | Skamania | Snohomish | Spokane | Stevens | Thurston | Wahkiakum | Walla Walla Whatcom | Whitman | Yakima

Adams County
Adams County Water District No. 1
Asotin County - None
Benton County
Benton County Well Water District - Approximately 12 miles east of Prosser
Plymouth Water District
County View Water/Sewer District (Formerly Poplar Heights Sewer District)
Tri City Estates Water District - Eastern half of Benton County
Chelan County
Alpine Water District - formed in November 1999 by approval of area voters for the purpose of taking over water operations previously provided by Public Utility District No. 1 of Chelan County. The District assumed the Utility Local Improvement District assessment debt that was initially financed through the Public Utility District for the construction of the new water system in the area. The District is operated by a three-member Board of Commissioners initially appointed by the Chelan County Commissioners.
Chelan Falls Water District  ( c/o PUD)
Lake Chelan Sewer District - established during the 1950s to provide sewer services to the Lake Chelan area. A three-member Board of Commissioners administers it.  The District has no employees and uses the City of Chelan for the general operation and maintenance of its facilities. During the current audit period, the City of Chelan handled the accounting and reporting services for the District.(2002) Chelan provides  general operation and maintenance of districts facilities
Lake Wenatchee Water District
Malaga Water District - established as a public entity in 1994 to provide water services to approximately 300 customers. Five  Directors govern the District. (2001)
Peshastin Water District - formed in November 1999 by approval of area voters for the purpose of taking over water operations previously provided by the Peshastin Community Water Association. The District’s four part-time employees manage the water services provided to the District’s 223 customers. The District is operated by a three-member Board of Commissioners.  (2001)
Stevens Pass Sewer District 24-J (Also in King County) - formed to provide sewer service to the residents of Stevens Pass.  Three  Commissioners govern the District. (2003)
Three Lakes Water District - established in 1978 to provide potable water to the Three Lakes subdivision in Chelan County. The District provides service to the Three Lakes subdivision plat.  A three-member Board of Commissioners governs the District serve a six-year term. The County is the ex-officio Treasurer for the District.  (1997)
Clallam County
Black Diamond Water District  - provides water services in an unincorporated area of Clallam County near the City of Port Angeles.  The District is governed by a  three-member Board of Commissioners.
Sunland Water and Sewer District - provides water and sewer services in an unincorporated area of Clallam County near the City of Sequim.  The District is governed by a three-member Board of Commissioners.
Clark County
Clark Regional Wastewater District - formed in 1958. Three elected board of commissioners serve six-year staggered terms;  president, vice president and secretary. Contracts with Clark County Public Works and the City of Vancouver for treatment services.  Feasibility study underway about combining the district and Clark County’s wastewater functions with Clark Public Utilities or the City of Vancouver to form a consolidated water and wastewater utility.
Hazel Dell Sewer District - formed in 1958. It encompasses approximately 32 square miles of urban and rural land . In cooperation with the City of Battle Ground, contracts with Clark County to provide treatment services. In cooperation with the City of Battle Ground, contracts with Clark County to provide treatment services. Salmon Creek Wastewater expansion with Battle Ground, Clark Co and Hazel Dell Sewer District
Columbia County - None
Cowlitz County
Beacon Hill Sewer District (Columbia Heights area, Beacon Hill area and Lexington area) - formed in Cowlitz County in June 1959. The District has three Board Members, who appoint a Manager.
Douglas County
Corral Springs Water District  
Douglas County Sewer District No. 1 - formed to provide sewer service in the East Wenatchee area. The District has nine full-time employees. A three-member Board of Commissioners. The Board is responsible for appointing the District Manager, who oversees most of the District’s daily operations. Serves East Wenatchee
East Wenatchee Water District - established in 1926 to provide water services to both the incorporated and unincorporated areas of East Wenatchee. The District serves over 21.5 square miles. The District is governed by a three-member Board of Commissioners. Serves East Wenatchee
Ferry County
Curlew Lake Sewer District
Curlew Water District  - supplies water to residents, businesses and schools in Curlew area
Inchelium Water District (Water and sewer services) - bounded on north by Hall Creek, on the south by Stenagar Creek, then one mile West of Inchelium Main Street and on one half mile East of Main Street.  Three member Board of Commissioners.
Franklin County
Basin City Water-Sewer District
Garfield County- None
Grant County 
Cascade Valley Water District - established in the 1950s to provide water to customers residing within the Cascade Valley. The District has three part-time employees and is administered by a three-member Board of Directors.  (2001)
Crescent Bar Sewer District (may be inactive 2003)
Beverly Water District
Royal Water District
Grays Harbor County
Grays Harbor Co Water District 1 - formed in 1946 when the District acquired the Grayland Water  Company. The District serves citizens that reside in the most southwesterly corner of Grays Harbor County along the Pacific Coast and State Route 105. It is governed by a three member Board of Commissioners. Disbursements are approved at monthly Board meetings and processed by the Grays Harbor County Auditor’s Office.
Grays Harbor County Water District 2 - formed in 1952. The District serves citizens in the Central Park area. It is governed by a three-member Board of Commissioners.  Disbursements are approved at monthly Board meetings and processed through Grays Harbor County.
Grays Harbor County Sewer District No 1
Grays Harbor County Sewer District No 6
Grays Harbor County Water District No 
Grays Harbor County Water District No 6
Grays Harbor County Water District No 7 - Dissolved 1999-  The Water System was created by a group of private citizens that resided in the Pacific Beach and Moclips area of Grays Harbor County. In 1990, it was incorporated as Grays Harbor Water District No. 7. The water system is now governed and run by Grays Harbor County under the name of Pacific Beach/ Moclips Water System.
Assumed by County
Island County
Admirals Cove Water District  -  formed in 1992 to furnish water service to the District's residents and is located on Whidbey Island, five miles southeast of Coupeville. The District serves approximately 350  in 1999. The District has no employees and contracts out its daily maintenance and operating activities. A three-member Board of Commissioners governs the District. (1999)
Bayview Beach Water District - organized in 1964 and is on the southern part of Whidbey Island. The District operates with four wells.  The District is governed by a five member Board of Commissioners. 
Camano Vista Water District  - organized in 1988 and is located on the southern end of Camano Island. A three-member  Board of Commissioners governs the District. The District consists of approximately 165 acres.
Clinton Water District - organized in 1945 and is located in Clinton on the southern end of Whidbey Island. A three-member Board of Commissioners governs the District. The District consists of approximately 3 square miles.
Crockett Lake Water District 
Freeland Water District -organized in 1964 and is located in Freeland on the southern portion of Whidbey Island. The District consists of approximately 1,027 acres. A three-member  Board of Commissioners governs the District.
Holmes Harbor Water District - formed in January 1976 as the Holmes Harbor Water District to create a wastewater facility for the individuals within its service area. This area is a planned development containing approximately 458 single-family building lots, which are located adjacent to a golf course.
Juniper Beach Water District - formed in 1990. The District provides water services to customers located in a small community on Camano Island at the north end of Port Susan. Three  Commissioners serving six-year terms govern the District.
Lagoon Point Water District - organized in the 1960s and is located in Greenbank on the southern portion of Whidbey Island. The District consists of approximately 2 square miles. A three-member  Board of Commissioners governs the District.
Lakeview Terrace Water District
Ledgewood Beach Water District
Long Beach Water District
Main Street Sewer Distict - Serves the village at Maple Ridge, a senior housing development, 2001.  
North Whidbey Water District
Penn Cove Park Water & Sewer District -  provides water and sewer to  residences located approximately two miles south of Oak Harbor, Washington. A  three-member Board of Commissioners directs the District. The  Pen Cove Park Water District merged into the Penn Cove Park Sewer District after voters approved the merger in November 2000. Merger of water and sewer district
Rhodena Beach Water District
Saratoga Water District
Scatchet Head Water District - organized in 1982 and is located on South Whidbey Island. A three-member Board of Commissioners governs the District.
Swantown Water District
Jefferson County
Jefferson County Water District No. 1
Jefferson County Water District No. 2
Jefferson County Water District No. 3
King County
Cedar River Water And Sewer District - Fairwood area of Renton and Maple Valley. The Cedar River Water and Sewer District is  governed by a three member Board of Commissioners.  This area covers approximately 35 square miles along the Cedar River, between the cities of Renton and Maple Valley. Provides water service to Maple Valley
Coal Creek Utility District - The District has 20 employees and is served by a three-member Board of Commissioners. Boundary Includes Covington, portion of Renton.  Bellevue assumed all customers inside its city limits into the Bellevue municipal utility.
Covington Water District (King County Water District No. 105)  - 53 sq. mi. unincorporated south King County, includes portions of Covington, Maple Valley and Black Diamond,  Covington Water District was created in 1960, and until 1988 it was known as King County Water District No. 105. Geographical boundaries of the District’s service area (approximately 53 square miles) were established to accommodate the zoning and growth permitted by the cities of Covington, Maple Valley and Black Diamond, as well as King County.  The District has an agreement with the City of Auburn to purchase water when needed. The District is also participating with the City of Tacoma, City of Kent, and Lakehaven Utility District in the Second Supply Project organized by the City of Tacoma. The project will provide the participants with additional water supply on a long-term basis.  Five  Commissioners oversee the District.  Member of Cascade Water Alliance (2003) Includes portions of Covington, Maple Valley and Black Diamond
Eastgate Sewer District - assumed by Bellevue 1994 Assumed by Bellevue
Fall City Water District - formed in 1982 to operate a well-water distribution system in the Fall City area.
Highlands Sewer District - serves portion of Shoreline  The District was formed to provide sewer service to the residents of the Highlands Community. The District has no employees. Three  Commissioners govern the District. (2001)
Serves part of Shoreline
Highline Water District (King County Water District No. 75) - incorporated in 1946 and serves part of Burien  Highline Water District, formerly known as King County Water District No. 75.  The District’s geographical area covers over 11,000 acres in the southern portion of King County and includes portions of SeaTac, Des Moines, Normandy Park, Burien, Tukwila, Kent and Federal Way, as well as unincorporated areas of King County. In 1995 the District expanded from a three-member to a five-member Board of Commissioners. Serves part of Burien , includes portions of SeaTac, Des Moines, Normandy Park, Burien, Tukwila, Kent and Federal Way
King County Water District No. 1 - North end of City of Yarrow Point   - Assumed by Bellevue 2005.  Required special Legislation in 2005 Assumed by Bellevue
King County Water District No. 17 (Hunts Point) - effective October 31, 1998, the City of Bellevue assumed the operations and all assets and liabilities of King County Water District No. 17.
Assumed by Bellevue
King County Water District No. 19 Vashon - established in 1925 to provide a safe water supply for the residents of Vashon Island. The District is the only public water system on Vashon, serving customers within six square miles of the central eastern portion of the Island. Three commissioners serve six-year terms on the Board.
King County Water District No. 20 ( King County Water District No. 85 merged with King County Water District No. 20 on April 30, 2003) - North Burien, Riverton Heights, McMicken Heights  King County Water District No. 20 provides water service to approximately residents and commercial users in its service area, which covers portions of Burien, SeaTac, Tukwila and unincorporated King County. The District also owns and operates, with two other water districts, a six-million gallon reservoir. Covers portions of Burien, SeaTac, Tukwila

Merger  of No. 85 and No. 20
King County Water District No. 45 - East of White Center business district, provides water services to customers in the White Center area. The District purchases its water from the City of Seattle.  Three  Commissioners oversee the District.
King Co Water District No. 49 - Burien - 3 sq. mi. Supplies  Normandy Park
King County Water District No. 54 - Serves parts of cities of Des Moines, Normandy Park, and Burien  King County Water District No. 54 was formed in 1939 to provide water service to customers within the City of Des Moines and Normandy Park.  Three Commissioners govern the District. Serves parts of cities of Des Moines, Normandy Park, and Burien
King County Water District 85 Merged with  King County Water District No. 20. Merged with Water District No. 20
King County Water District No. 90 - Renton Highlands King County Water District No. 90 lies in northeast Renton, approximately 18 miles southeast of Seattle.  A three-member Board of Commissioners oversees the District.
King County Water District No. 111 - provides water primarily incorporated areas surrounding Lake Meridian east of the City of Kent. Serves portions of Kent
King County Water District No. 117 - Hilltop Community
King County Water District No. 119 - Lake Marcel and Lake Joy area, Stillwater Hill and Cherry Valley area (Carnation-Duvall area) King County Water District No. 119 serves residential and commercial customers in and around Carnation, Lake Joy and Duvall. Served by a Board of three Commissioners. (2001) Water is purchased from the City of Seattle
King Co Water District No. 123 - Preston  King County Water District No. 123 provides water services to customers in a 10 square-mile area in Preston.
King Co Water District No. 125 - Riverton Heights King County Water District No. 125 serves customers in an area approximately three miles north of SeaTac Airport, within the cities of Burien, SeaTac and Tukwila, and parts of unincorporated King County. A  three-member Board of Commissioners governs the District. Serves portions of Burien, SeaTac and Tukwila
Lake Forest Park Water District    (King County No. 83) - organized in 1948, and is located in the City of Lake Forest Park. The District serves residences, the Lake Forest Park mall and City Hall  A three-member Board of Commissioners directs the District.  The District is bordered by Northshore Utility District, Shoreline Water District and the City of Lake Forest Park. (2004) Serves Lake Forest Park
Lakehaven Utility District - incorporated  in 1956 as Lake Haven Sewer District,    King County Water District No 124 and name changed to Federal Way Water and Sewer District. A merger with King County Water District No. 56 was completed in November, 1987. On August 7, 1994, the District changed its name to "Lakehaven Utility District."   Encompasses 35 sq. mi. the southern boundary overlaps  the Pierce County line,  and the eastern boundary overlaps slightly the western city limits of Auburn.  A five-member Board of Commissioners governs the District. The District serves parts of  of Federal Way Auburn, Milton, Edgewood, Pacific and Tacoma.
Merger No. 56
Midway Sewer District - Southwest portion of King County. A three-member Board of Commissioners governs the District’s operations. Serves part of Burien, Des Moines and SeaTac
Northeast Sammamish Water and Sewer District - created as the Sahalee Sewer District in 1969.  The District purchased the Sahalee Water Company, including all wells, water mains, storage tanks and all other items necessary for the successful operation of the water system in 1982.  The District pumps water from its own wells and sewer treatment is provided by Metro. (2002) Serves part of Sammamish
Northshore Utility District - is located in northern King County and provides utility services to users in the cities of Bothell, Kenmore, Kirkland, Lake Forest Park, Juanita, Totem Lake, Kingsgate and Finn Hill. A five-member Board of Commissioners, elected to a six year term, governs operations.   (In 1979, Northeast Lake Washington Sewer District merged with King County Water District Number 79 and the combined districts were known as Northeast Lake Washington Sewer and Water District name changed to North Shore) Serves cities of Bothell, Kenmore, Kirkland, Lake Forest Park
Merger of No. NE Lake Washington Sewer District and Water District No.  79
Ronald Wastewater District - incorporated in 1951 and was previously known as the Shoreline Wastewater Management District.  Is 15 sq. mi. within boundaries of Shoreline. The District provides service to users in the city of Shoreline. The District contracts with King County and the City of Edmonds for sewage treatment services. Serves Shoreline. The District contracts with King County and the City of Edmonds for sewage treatment services
Rose Hill Water District  - assumed by Kirkland, Bellevue and Redmond  1991 Assumed by Kirkland, Bellevue and Redmond
Sammamish Plateau Water and Sewer District - East of Lake Sammamish, north of Issaquah, south of Redmond, serves part of the City of Sammamish. The district is governed by a three-member Board of Commissioners.  The area covers approximately 30 square miles along the southeast side of Lake Sammamish and includes portions of City of Issaquah and the City of Sammamish.  Member of Cascade Water Alliance  The District serves portions of Sammamish and Issaquah
Shoreline Water District - East Shoreline from I-5 to Lake Washington The Shoreline Water District provides water service to customers in the Shoreline area. A three-member Board of Commissioners, elected to six-year terms governs the Districts operations. Serves part of Shoreline and Lake Forest Park
Skyway Water and Sewer District  (King Co. Water District  No. 994) - Serves Skyway, Bryn Mawr and Lakeridge areas.  Skyway Water and Sewer District is in southeast Seattle, approximately two miles northwest of downtown Renton. The District merged with Bryn Mawr-Lakeridge Water and Sewer District on May 31, 1999. The District purchases water through the Cascade Water Alliance, from the City of Renton, and draws water from it own wells.   Member of Cascade Water Alliance Purchases water through the Cascade Water Alliance, from the City of Renton
Merger with Bryn Mawr-Lakridge Water & Sewer
Snoqualmie Pass Utility District - Snoqualmie Pass area in both King and Kittitas counties (water and sewer)
Soos Creek Water and Sewer District - 35 square miles in southeast King County (Merger of Water District 58 and Cascade Sewer District in 1987)  Soos Creek Water and Sewer District provides water and sewer services to about 100,000 customers in southeast King County.  A  five-member Board of Commissioners has oversight responsibility for the District. (2003)
Merger of Water District No. 58 and Cascade Sewer District
Southwest Suburban Sewer District - provides sewer services to residential and commercial customers in southwestern King County from Seattle to Des Moines, including the Seattle-Tacoma International Airport. A  three-member Board of Commissioners oversees the District. Serves Burien
Stevens Pass Sewer District  (Also Chelan County) - formed to provide sewer service to the residents of Stevens Pass. Three  Commissioners govern the District.
Stevens Pass Sewer District No. 1 - Summit of Highway 2 at Stevens Pass - wastewater treatment for properties located at Stevens Pass  (See Chelan County)
Val Vue Sewer District - South of Seattle city limits;  service area includes portions of the cities of SeaTac, Burien, Tukwila and unincorporated King County. The District provides collection and transmission services, but other districts provide treatment services. On November 23, 1995, Rainier Sewer District merged into Val Vue Sewer District, resulting in a four-member Board. The District returned to a three-member Board on December 31, 1999. The service area includes portions of the cities of SeaTac, Burien, Tukwila and unincorporated King County.
Merger of Rainier Sewer District
Vashon Sewer District - provides sewage services.  King County treats the sewage for the District. Sewage treatment by King County
Woodinville Water District - formerly King County Water District No. 104; established in 1959; became known as the Woodinville Water District in 1985. The District purchases all its water supply from the City of Seattle for distribution to its customers.  A five-member Board of Commissioners administers the District. Purchases water from Seattle. Provides water and sewer services to Woodinville
Kitsap County
Annapolis Water District  - formed in 1951. Consolidated with Karcher Creek Sewer District 5 to form West Sound Utility District November 2007 election.  Consolidated with Karcher Creek Sewer District 5 to form West Sound Utility District, November 2007
Crystal Springs Water District
West Sound Utility District - formed by the consolidation of Annapolis Water District and Karcher Creek Sewer District in November 2007. The water-sewer district provides potable water in the Port Orchard urban area and South Kitsap County. The Utility District also provides sanitary sewer service  in the District service area. West Sound Utility District also operates the Joint Wastewater Treatment Facility that is jointly owned by the District and the City of Port Orchard. This Facility treats the wastewater in the District, City of Port Orchard, and McCormick Woods. The District has been serving the Port Orchard community since 1942. Port Orchard

Consolidation of Annapolis Water District and Karcher Creek Sewer District
Karcher Creek Sewer District 5 - formed as Kitsap County Sewer District No. 5 in 1947.  Consolidated with Annapolis Water District to form West Sound Utility District November 2007.  The district served customers in their main service area, just south of the City of Port Orchard, as well as portions of Port Orchard and other parts of Kitsap County   In the early 1980’s, the District and the City of Port Orchard joined forces to construct a wastewater treatment plant. The treatment plant started operation in May 1985. The District operates the plant under the direction of the Sewer Advisory Committee. Consolidated with Annapolis Water District to form West Sound Utility District
Kitsap County Sewer District No. 7 - located on Bainbridge Island. The District has no employees and contracts for a District Manager and Treatment Plant Operator.  Three Commissioners govern the District. (2002) Portion of Bainbridge Island
Manchester Water District - formed 1942 and construction on the water system started in 1947.  Three  Commissioners govern the District.
North Perry Water District, Kitsap County Water District #15 - created in 1942.The service area extends from the Bremerton city limits on the south to Keyport on the north end. The present boundaries are defined by agreements with the City of Bremerton, Silverdale Water District and Kitsap County Public Utility District No. 1.  In addition, the District also charges each customer for street lighting provided by Puget Sound Energy.
Old Bangor Water Dist No. 19
Rocky Point Water District
Silverdale Water District No. 16 - established in 1929 and is governed by a three-member  Board of Commissioners.
South Bainbridge Island Water District #18  Dissolved by Kitsap County Ordinance No. 207 (1997) Dissolved
Sunnyslope Water District - established in 1952.   Three Commissioners govern the District. (2002)
Tracyton Water District No. 17  - Kitsap County Superior Court Order dissolving district dated March 27, 2006 effective June 13, 2006
Dissolved
West Hill Water District No. 20
Kittitas County
Snoqualmie Pass Sewer District of King & Kittitas Counties (See King County)
Kittitas County Sewer District No 1, Snoqualmie Pass   The Snoqualmie Pass Utility District is in Kittitas County. The District is administered by three  Commissioners that serve six-year terms.
Kittitas County Water District No 2, Ronald   
Kittitas County Water District No 3, Easton   
Kittitas County Water District No 4, Thorp  
Kittitas County Water District No 5, Elk Meadows  
Kittitas County Water District No 6, Vantage  
Kittitas County Water District No 7,  Sun Light Waters
Klickitat County - None
Lewis County
Lewis County Sewer District No. 1  located northeast of Napavine it  began service in the late 1970’s . The Sewer District cooperates with the cities of Napavine and Chehalis in treating the areas sewage. The Sewer District and Napavine collect sewage from  their service areas and pipe it to the City of Chehalis sewage treatment plant for treatment. Sewer Operating Board, Sewer Interceptor agreement 1976 SD #1, Napavine,  Chehalis
Lewis County Water District No. 1, Randle - Napavine  
Lewis County Water District No. 2, Onalaska Water District   provides water and sewer services to District residents. Three Commissioners administer the District.
Lewis County Water District No. 3,  Packwood, formed in 1974. The original water system was constructed in 1935 and consisted of an impoundment structure on Snyder and Spring Creeks.  A three member Board of Commissioners manages the District.  (1999)
Lewis County Water-Sewer District No. 4  (Chehalis)
Lewis County Water-Sewer District No. 5  (Onalaska)
Lewis County Water-Sewer District No. 6, Lake Mayfield,  provides water and sewer services to residential units near Lake Mayfield. Three Commissioners administer the District.
Lincoln County - None
Mason County
Belfair Water District No. 1  - formed in 1966 and provides water to the community of Belfair.  The District is governed by a Board of three Commissioners. (2002)
Harstene Point Water-Sewer District - formed at election of May 2008 to include all lands currently within Hartstene Pointe and Hartstene Pointe Addition 1-10 as platted. The District is governed by a board of three Commissioners.
Maggie Lake Water District No. 3 - formed in 1979 to provide water service to Maggie Lake residents. Three Commissioners govern the District.
Tahuya River Valley Water District
Trails End Water District 2   
Okanogan County
Lake Osoyoos Water District
Pacific County
Chinook Water District  - water services to Chinook area residents. Three  Commissioners govern the District. (2003)
Seaview Sewer District - provides sewage disposal services to property owners in the Seaview area. The District contracts with a private firm for billing, receipting, depositing and posting customer payments. The District has a three-member Board of Commissioners. Contract with Ilwaco for treatment and operation of Joint Wastewater Treatment Plant - Seaview collection system only - raw sewage is pumped into the Joint Waste Water Treatment Plant in Ilwaco for treatment
Willapa Valley Water District - serves Willapa Valley and East Raymond areas. The District succeeded the Willapa Valley Water Company in 1934 in order to be eligible to receive state aid to finance an expansion project.  Three Commissioners govern the District.
Pend Oreille County
Chippewa Water and Sewer District (Ione area) - formed to provide water and sewer services to Chippewa residents.    Three Commissioners govern the District.
Diamond Lake Water and Sewer District - formed to provide water and sewer services to the residents of Diamond Lake.   Three Commissioners govern the District.
Lenora Water and  Sewer District - created  in 1991 by Pend Oreille County  Resolution 91-104 in conjunction with the Camelot Shores subdivisions. Later the subdivisions private water system became a part of the Lenora Water District created by Pend Oreille County Commissioners Resolution in 2000.  It provides water and sewer service to the Camelot Shores area on the Pend Oreille River. Three commissioners govern the district.
Ponderay Shores Water and Sewer District  
Sacheen Lake Water and Sewer District, Newport area  
Pierce County
Ashford Water District  - established in 1978. The District provides water customers residing in a 10-square-mile area of Eastern Pierce County.  A three-member Board oversees operations.
Burnett Water District
Clear Lake Water District  - established on May 19, 1992. The District provides water to 105 customers encompassing a 400 acre area of eastern Pierce County approximately 10 miles north of Eatonville.
Crystal Mountain Sewer District -   formed in the early 1980s to provide sewer service to Gold Hills Homeowner Association, the only private land at Crystal Mountain Ski Resort. In 1994, the District formed a Utility Local Improvement District, obtained a loan and began construction of a water system.  Three Commissioners govern the District.
East Gig Harbor Water District - enacted by Pierce County Resolution R2001-193sl  in 200, election held May 2002.
Elbe Water and Sewer District
Elkhorn Water District
Kapowsin Water District
Kopachuck Ridge Estates Water District
Lakewood Water District  - formed in 1943 to serve water to customers in the City of Lakewood within Pierce County. The District has a three-member Board of Commissioners. Steilacoom purchases water from Lakewood; Joint Facilities Contingency Fund established by interlocal agreement
Mckenna Water District - district resources include four wells, a 120,000-gallon reservoir and seven miles of pipe.  The District is managed by three  Commissioners .
Park Junction Water-Sewer District in the Elbe Area - Pierce County Ordinance 2006-71, 8-01-06 (Formed by alternative method 57.04.140 RCW)
Valley Water District - The Valley Water District was formed in 1993. The District manages water distribution to a number of Pierce County residential areas: Chinook, Valley, Alderwood, Winchester, View Royal and Eldorado. The District operates with a three-member Board of Commissioners.
Webstone Water District - Dissolved 2002 - was located in the Northeast corner of Pierce County between the cities of Pacific and Sumner  with approximately 175 water service connections.  The District had three  Commissioners, one of which was  appointed District Manager. (1997)
Dissolved
Whiteman's Cove Water District
Wollochet Harbor Sewer District  - incorporated in 1994 to secure state funding to build a transfer station to connect with the Gig Harbor sewer system; composed of 65 homeowners residing in a six-block area of Pierce County. The District is governed and operated by three Commissioners.
San Juan County
Cape San Juan Water District
Cattle Point Water District
Eastsound Sewer & Water District  - provides sewer services to residents in Orcas Island. The District is governed by a three-member Board of Commissioners.
Fisherman Bay Sewer District - established  in 1974, the District provides services to Fisherman's Bay residents and businesses located on Lopez Island. The District  is governed by a three-member Board of Commissioners.
Skagit County
Alger Water District - formed 2-6-96 and dissolved as of 2001; system turned over to Skagit County PUD  Dissolved
Skagit County Sewer District No. 1 - provides sewer services primarily to residential residents, as well as a few seasonal businesses that operate in rural LaConner. The District’s service area encompasses the Sneeoosh Beach area, on the west side of Skagit Bay.
Skagit County Sewer District No. 2
Skagit County Sewer District No. 3 - Dissolved by Resolution 18290 6-26-01
Dissolved
Skagit County Sewer District No. 4 - Bullerville Sewer District (Rockport)
Skagit County Water District No. 1 - provides and maintains water service to properties within the District boundaries. The boundaries include Highway 20 near the Town of Concrete and the Rasar State Park area. Three Commissioners govern the District.
Skamania County
Home Valley Water District 1 - became operational in June 1980. The community of Home Valley is approximately eight miles east of the City of Stevenson. The District  is overseen by three Commissioners.
Snohomish County
Alderwood Water and Wastewater District - located in southwest Snohomish County; provides water and sanitary sewer to an area encompassing 60 square miles. A five-member Board of Commissioners, elected to six-year terms, governs the District’s operations. (2003) Serves South Harbour Pointe Area of Mukilteo
Blue Spruce Water District Dissolved 10/15/98 (court order)
Cross Valley Water District  -   Has a three member board of commissioners.
Highland Water District - formed April 1, 1998;  provides water services to customers located in approximately 16 miles of unincorporated Snohomish County, between Monroe and Sultan.  Three Commissioners, elected to six-year terms, govern the District. The District purchases water from the City of Everett.
Lake Stevens Sewer District - incorporated in 1957. A three-member Board of Commissioners, each of whom serves six-year terms, governs the District.  The District provides sewer services to customers in the greater Lake Stevens area in Snohomish County. (2003) Lake Stevens contracts with the District for collection and treatment of all raw sewage
Mukilteo Water District - incorporated in 1920; governed by a three-member Board of Commissioners.  The  District provides both water and sewer services to all its customers.  Olympus Terrace Sewer District voted to merge with the district in November 2007. The  District’s water is purchased from the City of Everett. Sewage is conveyed to the City of Everett  for treatment. In addition to the water and sewer services described above, the District also bills storm drainage fees for the City of Mukilteo and parts of the City of Everett. (2003) Serves  Mukilteo

Merger of Olympus Terrace Sewer District
Olympic View Water And Sewer District No. 1 - incorporated in 1937; governed by three  Commissioners.  The District serves the Town of Woodway, part of the City of Edmonds, and the neighboring unincorporated portions of Snohomish County. In 1998, The District completed construction of its Deer Creek Water Treatment Plant, which has a capacity of one million gallons per day. However, the District’s primary source of water is the City of Seattle. Serves the Town of Woodway, part of the City of Edmonds
Olympus Terrace Sewer District - incorporated in 1969; three Commissioners, elected to six year terms. The District’s boundaries encompassed an area of approximately 3.5 square miles within the City of Mukilteo Merged with Mukilteo Water District November 2007 election
Silver Lake Water District  -  organized in 1934 to construct, maintain and operate water and sewer systems within its boundaries in south Snohomish County. Encompassing 12 square miles, the District is approximately 15 miles north of Seattle and 1.5 miles south of Everett. Three  Commissioners administer the District. The District provides water service  and sanitary sewer service. The Snohomish County Treasurer is the District’s ex officio treasurer and fiscal agent. Water is purchased solely from the City of Everett. Sewage is pumped to the City of Everett’s sewage treatment plant and to King County Metro.
Startup Water District  (Water & Sewer)
Spokane County
Chattaroy Springs West Water District No. 11
East Spokane Water District No. 1  -  was formed in 1917 and is governed by a three-member Board of Commissioners. The Spokane County Treasurer serves as their ex-officio Treasurer. The District, located in the central Spokane Valley, serves about 2.75 square miles.
Four Lakes Water District No. 10  - provides water service to customers in the Four Lakes area west of Spokane.  The District is governed by three Commissioners.
Hangman Hills Water District No. 15 -  The District  is governed by three Commissioners.
Irvin Water District No. 6 -  The District is governed by a three-member Board of Commissioners. The Spokane County Treasurer’s and Auditor’s offices process the District’s revenues and expenditures. (2002)
Liberty Lake Sewer and Water District - Residents of the Liberty Lake community formed Liberty Lake Sewer and Water District No. 1 in 1973 to provide sewer and water service and to protect the ecological health of the lake. The District is governed by a three-member Board of Commissioners. Serves Liberty Lake.   City considered assumption, see  Executive Summary Assumption Feasibility Study, 2004. Ordinance to assume district was challenged by district and was declared null and void by Superior Court.
Spokane County Water District No. 3 - formed in 1986 by voters living in the service area of the Spokane Suburban Water Company, a wholly owned subsidiary of the General Waterworks Corporation. In 1988, the District acquired the company’s water supply, distribution, miscellaneous facilities and the operating headquarters. The District is composed of nine distinct and unconnected water systems located in Spokane Valley, the Manito Golf Course area, Linwood, Mead, Colbert, Chattaroy and Nine Mile.  Three Commissioners govern the District.
Strathview Water District No. 16  -  is located near Medical Lake and serves 89 customers.  Three Commissioners govern the District.
Valley of the Horses Water District No. 12
Velview Water District No. 13
Whitworth Water District No. 2  -  was formed in 1939 and merged with Colbert Water District in 1984 to more efficiently provide water service to North Spokane and the Colbert area. The District has eight reservoirs, 13 wells and seven booster stations. It provides hookups, maintenance, construction of new systems and street lighting to customers. A Board of five Commissioners governs the District.
Colbert Water District merged
Williams Lake Sewer District No. 2
Stevens County
Hunters Water District
Loon Lake Sewer District No 4 - was formed to provide sewer services to Loon Lake residents.. Three Commissioners govern the District. The Stevens County Treasurer and Auditor’s Office process the District’s revenues and expenditures.
Thurston County - None
Wahkiakum County
Skamokawa Water and Sewer
Walla Walla County
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  -  provides water services in Bellingham area. The District is governed by a three-member Board of Commissioners.
Point Roberts Water District No.  4   -  is located in the northern most corner of Whatcom County and provides water and sewer services to residences and businesses located in Point Roberts. A three-member Board of Commissioners governs the District.
Whatcom County Water District No. 7 - provides water services in the Bellingham area.   The District is governed by a three member Board of Commissioners.
Birch Bay Water & Sewer District  No. 8 - dstrict offers water and sewer services to the Birch Bay area, the northwest section of Whatcom County. A three-member Board of Commissioners administers the District.
Lake Whatcom Water and Sewer District (Whatcom County Water  and Sewer District No. 10) - originally established in 1968; serves the Lake Whatcom area east of Bellingham. The District is administered by a five-member Board of Commissioners.
Whatcom County Water District No. 12  -  provides sewer services in the Samish Basin. The District is governed by a three-member Board of Commissioners.
Whatcom County Water and Sewer District No. 13 - provides water and sewer services in Maple Falls. The District is governed by a three-member Board of Commissioners.
Glacier Water District No. 14  -  provides water services in the Glacier area.  The District is governed by a three-member  Board of Commissioners.
Whatcom County Water District No. 18  -  water services in Acme. The District is governed by a three-member Board of Commissioners  
Evergreen Water-Sewer  District No. 19
Whitman County
Steptoe Sewer and Water District No. 1 - formed to provide utility services to  Steptoe residents.  Three Commissioners govern the District.
Yakima County
Cowiche Sewer District  -  was established in the late 1950s to provide a sewer system to customers in the Cowiche area. Three Commissioners govern the District. (2002)
Terrace Heights Sewer District - governed by three  Commissioners, who serve six-year terms.