CARSON, WA · Skamania County

UNDERWOOD 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): WA5390200
System type: Community Water System
Population served: 1,000
Service connections: 379
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2025 – April 30, 2025
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
September 1, 2023 – September 30, 2023
Resolved
Monitoring, Regular
—
Simazine
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Toxaphene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
BHC-GAMMA
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Endrin
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Methoxychlor
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Heptachlor epoxide
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Heptachlor
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
LASSO
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Atrazine
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Chlordane
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
Benzo(a)pyrene
January 1, 2023 – December 31, 2025
Archived
Monitoring, Regular
—
HEXACHLOROBENZENE
January 1, 2023 – December 31, 2025
Archived
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2022 – May 31, 2022
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – September 30, 2014
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – September 30, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – October 22, 2012
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Styrene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Toluene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Benzene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Trichloroethylene
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Carbon tetrachloride
January 1, 2011 – December 31, 2013
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Endrin
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
BHC-GAMMA
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Methoxychlor
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Toxaphene
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Simazine
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Atrazine
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
LASSO
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Heptachlor
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Pentachlorophenol
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Diquat
April 1, 2008 – June 30, 2008
Archived
Monitoring, Regular
—
Endrin
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Chlordane
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Pentachlorophenol
April 1, 2005 – June 30, 2005
Archived
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
HEXACHLOROBENZENE
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Heptachlor epoxide
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Heptachlor
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
LASSO
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Atrazine
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Hexachlorocyclopentadiene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Simazine
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) adipate
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Toxaphene
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
Methoxychlor
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
BHC-GAMMA
April 1, 2005 – June 30, 2005
Resolved
Monitoring, Regular
—
LASSO
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
Archived
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
—
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)
June 1, 1996 – June 30, 1996
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
April 1, 2025 – April 30, 2025	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
September 1, 2023 – September 30, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2023 – December 31, 2025	Monitoring, Regular	Simazine	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Toxaphene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	BHC-GAMMA	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Endrin	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Methoxychlor	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Heptachlor epoxide	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Heptachlor	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	LASSO	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Atrazine	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Chlordane	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	Benzo(a)pyrene	—	Archived
January 1, 2023 – December 31, 2025	Monitoring, Regular	HEXACHLOROBENZENE	—	Archived
May 1, 2022 – May 31, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 1, 2014 – September 30, 2014	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2013 – September 30, 2013	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2012 – October 22, 2012	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Styrene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Toluene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Benzene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Trichloroethylene	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 2011 – December 31, 2013	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 2008 – June 30, 2008	Monitoring, Regular	Chlordane	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Endrin	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	BHC-GAMMA	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Methoxychlor	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Toxaphene	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Simazine	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Hexachlorocyclopentadiene	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Atrazine	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	LASSO	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Heptachlor	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Heptachlor epoxide	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	HEXACHLOROBENZENE	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Benzo(a)pyrene	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Pentachlorophenol	—	Archived
April 1, 2008 – June 30, 2008	Monitoring, Regular	Diquat	—	Archived
April 1, 2005 – June 30, 2005	Monitoring, Regular	Endrin	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Chlordane	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Pentachlorophenol	—	Archived
April 1, 2005 – June 30, 2005	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	HEXACHLOROBENZENE	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Heptachlor epoxide	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Heptachlor	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	LASSO	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Atrazine	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Hexachlorocyclopentadiene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Simazine	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Di(2-ethylhexyl) adipate	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Toxaphene	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	Methoxychlor	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	LASSO	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Chlordane	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Pentachlorophenol	—	Archived
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	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
June 1, 1996 – June 30, 1996	Monitoring, Routine Major (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

May 6, 2025State Compliance achieved1 linked violation
October 5, 2023State Compliance achieved1 linked violation
June 6, 2022State Compliance achieved1 linked violation
September 30, 2014State Compliance achieved1 linked violation
September 30, 2014State Compliance achieved20 linked violations
September 30, 2013State Compliance achieved1 linked violation
October 22, 2012State Compliance achieved1 linked violation
November 5, 2008State Compliance achieved72 linked violations
November 5, 2008State Compliance achieved29 linked violations
November 5, 2008State Compliance achieved141 linked violations
November 5, 2008State Compliance achieved29 linked violations
January 1, 2008State Compliance achieved41 linked violations
January 1, 2008State Compliance achieved20 linked violations
January 1, 2008State Compliance achieved13 linked violations
June 30, 1996State Violation/Reminder Notice4 linked violations

Contact

UNDERWOOD

Phone not on record

CARSON, WA 98610