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Washington sewage discharges in 2026

77 records of sewage discharges and water advisories in Washington dated in 2026, newest first. Each record keeps the source's own times and wording; a record from the last three months, or one that sets a status now, also has a page of its own.

By type: Sanitary sewer overflow (SSO)62 · Treatment plant bypass8 · Combined sewer overflow (CSO)5 · Treatment bypass1 · Report not fully read1

By source: Washington State Department of Ecology (sewage spill list, RCW 90.48.636)74 · King County Wastewater Treatment Division and Seattle Public Utilities (CSO status map)3

2026 in other states: Connecticut, District of Columbia, Florida, Georgia, Maine, Maryland, Massachusetts, Michigan, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode Island, Vermont, Virginia.

Source: the agencies, sewer operators and EPA records named on each row and on the Sources page. Updated 2026-11-06 06:13 UTC.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps.

Records in Washington, 2026, newest first
WhenReportStatus
to Nov 5, 4:10 PMSeattle Public Utilities · Lake Union · 145 Seattle CSO outfall 145 · CSO · volume not reported report · notice · mapto Nov 7, 4:10 PM
to Nov 5, 10:10 AMSeattle Public Utilities · Lake Union · 124 Seattle CSO outfall 124 · CSO · volume not reported report · notice · mapto Nov 7, 10:10 AM
to Nov 4, 10:30 AMSeattle Public Utilities · Lake Union · 124 Seattle CSO outfall 124 · CSO · volume not reported report · notice · mapto Nov 6, 10:30 AM
Seattle Public Utilities · 6000 Block of 44th Avenue NW, Seattle · SSO · 29,922 gallons report · noticereported
Lakehaven · East Passage · Laktoa Wastewater Treatment Plant · SSO · volume not reported report · notice · mapto Nov 9, 1:00 PM
to 4:05 PMLakehaven · 27000 Block of 13th Avenue S, Des Moines · SSO · 15 gallons report · noticeended
to 9:18 PMSeattle Public Utilities · Duwamish Waterway · 1100 Block of 23rd Ave S, Seattle · SSO · 15 gallons report · notice · mapended
to 1:32 PMKing County Wastewater Treatment Division · Puget Sound · 103rd Ave SW at Vashon Highway, Vashon · SSO · “< 2,500 Gallons” report · notice · mapended
to 1:30 PMAlderbrook Resort & Spa STP · Hood Canal · 0 Block of Alderbrook Dr · Bypass · 20,000 gallons report · notice · mapended
to 4:23 PMCamas STP · Columbia River · 3rd Ave & Crown Rd · SSO · 100 gallons report · notice · mapended
Seattle Public Utilities · 1000 Block of NE 133rd St, Seattle · SSO · 750 gallons report · noticereported
Lott · 4500 block of Martin Way E · SSO · 20 gallons report · noticereported
to 3:00 PMRichland POTW · 300 block of Riverwood Street, Richland/Columbia Park Trail · SSO · 2,500 gallons report · noticeended
to 10:45 PMPierce County · 26th Ave S / 88th St S · SSO · 200 gallons report · noticeended
to 4:30 PMMidway WWTP · East Passage · S 211th St and 20th Ave S, Des Moines · SSO · 5,000 gallons report · notice · mapended
to 1:30 PMOrting STP · Carbon River · 902 Rocky Rd NE · Bypass · 17,350 gallons report · notice · mapended
to Sep 27, 2:22 AMSeattle Public Utilities · Lake Washington · 8700 Block of Sandpoint Way NE, Seattle · SSO · 18,100 gallons report · notice · mapended
to 8:40 PMSeattle Public Utilities · Lake Union · Eastlake Ave E and Roanoke St, Seattle · SSO · 4,000 gallons report · notice · mapended
to 12:05 PMCity of Port Angeles · “Strait Juan de Fuca” · 1500 Block E Columbia · CSO · 7,855 gallons report · noticeended
to 10:10 PMSeattle Public Utilities · 5th Avenue and Columbia Street, Seattle · SSO · 120 gallons report · noticeended
to 3:00 PMCentralia STP · Chehalis River · 800 Block W Pine St · SSO · 10 gallons report · notice · mapended
Concrete WWTP · South end of North Pike Ave, Concrete · SSO · volume not reported report · noticereported
to 6:23 PMPullman WWTP · “Dry Fork Creek” · 100 block of SE Crestview · SSO · 100 gallons report · noticeended
to 11:45 AMLeavenworth POTW · Wenatchee River · KOA lift station on River Bend Drive · SSO · 120 gallons report · notice · mapended
City of Spokane · Unknown/Not Reported · SSO · 600 gallons report · noticeended
Lott · 4000 Block 26th Ave SE · SSO · volume not reported report · noticereported
to Sep 17, 2:33 PMMontesano STP · Intersection Fleet St and W Spruce Ave, Montaseno · SSO · 3,000 gallons report · noticeended
to 7:15 PMVancouver · 4400 block of East 5th St · SSO · 200 gallons report · noticeended
to 4:30 PMOkanogan POTW · Okanogan River · 6th Ave and Maple · SSO · 200 gallons report · notice · mapended
to Aug 20, 10:30 AMCamas STP · Columbia River · SE Dallas St & 3rd Ave · SSO · 250 gallons report · notice · mapended
to 2:00 PMLeavenworth POTW · Wenatchee River · KOA Lift Station, River Bend Drive, Leavenworth · SSO · 80 gallons report · notice · mapended
to 1:38 PMHoquiam STP · Grays Harbor · W Emerson Ave & Spencer St · SSO · “50-100 gallons” report · notice · mapended
to 5:30 PMBig Lake WWTP · Intersection of Otterpond Road and Highway 9, Skagit County · SSO · 20,000 gallons report · noticeended
to 9:11 AMStevenson STP · Columbia River · 500 block of SW Rock Creek Dr. · SSO · 700 gallons report · notice · mapended
Seattle Public Utilities · 1800 Block of NE 96th St, Seattle · SSO · 1 gallon report · noticereported
Seattle Public Utilities · 1200 Block of 19th Avenue East, Seattle · SSO · 2,244 gallons report · noticereported
to 12:12 PMCamas STP · SE Dallas Street & SE 3rd Ave · SSO · 50 gallons report · noticeended
Seattle Public Utilities · 800 Block of 5th Avenue, Seattle · SSO · 1,000 gallons report · noticereported
to 6:10 PMSWSSD · SW 156th St & Ambaum Blvd, Burien · SSO · 500 gallons report · noticeended
to 11:20 PMSeattle Public Utilities · 800 Block of 5th Avenue, Seattle · SSO · 650 gallons report · noticeended
to 2:05 PMCamas STP · SE Dallas St & SE 3rd Ave · SSO · 500 gallons report · noticeended
to 6:20 PMLake Stevens Sewer District WWTP · Lake Stevens · 11-Thousand Block of North Lakeshore Drive · SSO · 7,000 gallons report · notice · mapended
to Aug 17, 8:00 AMEverson WWTP · Nooksack River · 105 Park Dr, Everson · Bypass · 25,000 gallons report · notice · mapended
to Aug 18, 11:00 PMPort Orchard WWTP · Sinclair Inlet · 700 Block of Muirkirk Lane SW, Port Orchard · SSO · 10 gallons report · notice · mapended
to Aug 18, 8:00 PMCity of Spokane · 7000 block of N Tucannon St. - Wind River Lift Station · SSO · 500 gallons report · noticeended
to 12:30 PMMabton POTW · 900 block of Vance Rd., Mabton, WA · SSO · 40,000 gallons report · noticeended
Seattle Public Utilities · 4-Thousand Block of NE 92nd Street, Seattle · SSO · volume not reported report · noticereported
to 8:50 PMPost Point Resource Recovery Plant · Bellingham Bay · 200 McKenzie Ave, Bellingham · SSO · 6,524 gallons report · notice · mapended
to Aug 19, 3:00 AMLOTT Clean Water Alliance · 1900 block of 16th Ave SE · SSO · “5-25 gallons” report · noticeended
to 3:54 PMRichland POTW · Columbia River · 555 Lacy Rd, Richland, 99352 · Bypass · 402,053 gallons report · notice · mapended
to 1:28 PMKennewick POTW · Columbia River · 416 N. Kingwood St. Kennewick WA 99336 · Bypass · 177,321 gallons report · notice · mapended
to Aug 8, 1:15 PMEverson WWTP · Nooksack River · 105 Park Dr, Everson · Bypass · 100,000 gallons · notice · mapended
to 1:30 PMLakehaven · 54th Court South, Auburn, WA · SSO · 50 gallons · noticeended
to 4:55 PMRichland POTW · Columbia River · Columbia Point Marina Park · SSO · 50 gallons · notice · mapended
to Aug 3, 4:00 AMCity of Spokane · Multiple Locations/Various · Report · 1,000 gallons · noticeended
City of Spokane · 7600 Block of North Tucannon Street · SSO · volume not reported · noticereported
to 3:20 PMKitsap County · Dyes Inlet · Pump Station 12, Chicho Way and Newberry Hill Rd · SSO · 2,000 gallons · notice · mapended
Spokane County Regional WRF · 1600 block of W Deborah Ln, Spokane, WA · SSO · 50 gallons · noticeended
LOTT Clean Water Alliance · Budd Inlet · 600 block of Grant St SW · SSO · 2,000 gallons · notice · mapreported
to 5:15 PMDcwa · 18000 block of NE 164th Cir · SSO · 100 gallons · noticeended
to 3:02 PMPost Point Resource Recovery Plant · Bellingham Bay · 200 McKenzie Avenue, Bellingham, WA · Bypass · 424,000 gallons · notice · mapended
to 4:45 PMCity of Tacoma Environmental Services · 7200 block of E F St · SSO · 100 gallons · noticeended
to 11:00 AMPullman WWTP · South Fork Palouse River · Intersection of Cleveland and NW State St. · SSO · 25 gallons · notice · mapended
to Jul 16, 2:00 PMSeattle Public Utilities · 4100 Block of Roosevelt Way NE, Seattle, WA · SSO · 1,200 gallons · noticeended
to 10:02 PMBainbridge Island WWTP · Puget Sound · 400 block of Harborview Dr SE · SSO · 450 gallons · notice · mapended
to 2:15 PMKing County Wastewater Treatment Division · Puget Sound · 3380 Beach Drive SW, Seattle · CSO · 85,000 gallons · notice · mapended
to 8:30 AMCity of Tacoma Environmental Services · Commencement Bay · 2201 E Portland Ave, Tacoma · Bypass · 100 gallons · notice · mapended
to Jul 7, 3:01 AMSeattle Public Utilities · Washington Park Arboretum · SSO · 1,000 gallons · noticeended
to 10:00 PMCity of Tacoma Environmental Services · 1000 block of N J St · SSO · 10 gallons · noticeended
to 4:14 PMLake Stevens Sewer District WWTP · Ebey Slough · Lake Stevens WWTP Facility · Bypass · 94 gallons · notice · mapended
to 4:35 PMCity of Anacortes · Washington Park, Anacortes, WA · SSO · 10 gallons · noticeended
to 9:30 PMLynnwood STP · 18000 block of Alderwood Parkway, Lynnwood, WA · SSO · 1,400 gallons · noticeended
to 4:35 PMVancouver · 800 block of NW 41st St · SSO · 1,125 gallons · noticeended
to 11:30 PMLOTT Clean Water Alliance · Smith St SE & Kiely Dr SE · SSO · 100 gallons · noticeended
to 1:30 PMSeattle Public Utilities · 2800 Block of S Byron St, Seattle, WA · SSO · 20 gallons · noticeended
to 1:25 PMLakehaven · Intersection of Enchanted Pkwy S and Military Road S · SSO · 1,000 gallons · noticeended
to 8:00 PMWaitsburg STP · Westbound lane HWY 124, Near 300 block of W. 2nd St. · SSO · “Unknown. Reported contained in existing pipe.” · noticeended

Sources: King County / Seattle CSO overflow status CSV, retrieved 2026-11-05 21:17 UTC; Washington Ecology Sewage Spills list (RCW 90.48.636 public website), retrieved 2026-11-06 06:01 UTC. A report's record id and times show when you hover or focus its "report" link.