Vashon, WA · King County

WATER DISTRICT 19 Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Washington’s official records. Always confirm current status with Washington before making decisions based on this information.

System facts

System ID (PWSID): WA5338900
System type: Community Water System
Population served: 3,723
Service connections: 1,701
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Treatment Technique (SWTR and GWR)
Health-based
Long Term 2 Enhanced Surface Water Treatment Rule
August 1, 2025 – August 31, 2025
Resolved
Monitoring, Regular
—
Styrene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Toluene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Benzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
Vinyl chloride
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2020 – December 31, 2025
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2020 – December 31, 2025
Archived
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
September 1, 2016 – September 30, 2016
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2009 – December 31, 2009
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Toluene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Benzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Styrene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Carbofuran
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Aldicarb
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Vinyl chloride
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Carbon tetrachloride
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Trichloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Tetrachloroethylene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
CHLOROBENZENE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Benzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Toluene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Styrene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Endrin
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
BHC-GAMMA
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Methoxychlor
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Toxaphene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Simazine
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
LASSO
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Heptachlor
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Dalapon
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Picloram
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Dinoseb
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
2,4,5-TP
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
OXAMYL
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Aldicarb sulfone
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
ETHYLENE DIBROMIDE
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
1,2-DIBROMO-3-CHLOROPROPANE
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
OXAMYL
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Dinoseb
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Picloram
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Dalapon
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Chlordane
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Heptachlor
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
LASSO
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Simazine
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Methoxychlor
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Endrin
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2004 – September 30, 2004
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2000 – September 30, 2000
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1979 – October 31, 1979
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
August 1, 2025 – August 31, 2025	Treatment Technique (SWTR and GWR)	Long Term 2 Enhanced Surface Water Treatment Rule	Health-based	Resolved
January 1, 2020 – December 31, 2025	Monitoring, Regular	Styrene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Toluene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Benzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	Vinyl chloride	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	p-Dichlorobenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Archived
January 1, 2020 – December 31, 2025	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
September 1, 2016 – September 30, 2016	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate	—	Resolved
March 1, 2006 – March 31, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Toluene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Benzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Carbon tetrachloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Styrene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Carbofuran	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Aldicarb	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Vinyl chloride	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Trichloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Tetrachloroethylene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	CHLOROBENZENE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Benzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Toluene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Styrene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Endrin	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	BHC-GAMMA	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Methoxychlor	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Toxaphene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Simazine	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	LASSO	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Heptachlor	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Heptachlor epoxide	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Chlordane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Dalapon	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Picloram	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Dinoseb	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	2,4,5-TP	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Pentachlorophenol	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	OXAMYL	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	ETHYLENE DIBROMIDE	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	1,2-DIBROMO-3-CHLOROPROPANE	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Aldicarb sulfoxide	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	OXAMYL	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Dinoseb	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Picloram	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Dalapon	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Heptachlor	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	LASSO	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Simazine	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Methoxychlor	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Endrin	—	Resolved
September 1, 2004 – September 30, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 2000 – September 30, 2000	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
November 1, 1992 – November 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
October 1, 1979 – October 31, 1979	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

September 15, 2025State Compliance achieved1 linked violation
September 15, 2025State Violation/Reminder Notice2 linked violations
December 9, 2020State Compliance achieved1 linked violation
October 31, 2016State Compliance achieved1 linked violation
September 22, 2016State Violation/Reminder Notice1 linked violation
September 22, 2016State Compliance achieved1 linked violation
December 16, 2014State Compliance achieved1 linked violation
September 22, 2010State Compliance achieved1 linked violation
March 11, 2010State Compliance achieved1 linked violation
April 24, 2007State Compliance achieved46 linked violations
July 1, 2005State Compliance achieved121 linked violations
July 1, 2005State Compliance achieved95 linked violations
July 1, 2005State Compliance achieved127 linked violations
September 30, 2000State Violation/Reminder Notice8 linked violations
November 30, 1992State Violation/Reminder Notice2 linked violations
August 31, 1992State Violation/Reminder Notice2 linked violations

Contact

WATER DISTRICT 19

Phone not on record

Vashon, WA 98070