Drinking Water Compliance OS

CASTLE ROCK, WA · Cowlitz County

CASTLE ROCK MUNICIPAL WATER 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)
WA5311800
System type
Community Water System
Population served
4,367
Service connections
1,202
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

Violation history

  • Monitoring and Reporting (DBP)

    —

    TTHM

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Total Haloacetic Acids (HAA5)

    January 1, 2023 – December 31, 2023

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Benzene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Toluene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    Styrene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2007 – December 31, 2007

    Resolved

  • 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)

Enforcement actions

Contact

CASTLE ROCK MUNICIPAL WATER

Phone not on record

CASTLE ROCK, WA 98611