Public Water Partners

CASTLE ROCK, WA · Cowlitz County

CASTLE ROCK MUNICIPAL WATER Water System

Consumer Confidence Report status

CASTLE ROCK MUNICIPAL WATER must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for CASTLE ROCK MUNICIPAL WATER.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)

CASTLE ROCK MUNICIPAL WATER is one of 112 community water systems in Washington in the 3,301 to 10,000 people size category, serving 4,367 people from surface water.

As of August 1, 2026, its federal record holds 45 entries between 1979 and 2026, all of which EPA lists as closed.

Of the 45, 44 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, the Surface Water Treatment Rules, and the Stage 2 Disinfectants and Disinfection Byproducts Rule.

Violation history

  • Monitoring of Treatment (SWTR-Filter)

    —

    Surface Water Treatment Rule

    March 1, 2026 – March 31, 2026

    Resolved

  • 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

    —

    Tetrachloroethylene

    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

    —

    Trichloroethylene

    January 1, 2008 – December 31, 2010

    Archived

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    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

    —

    1,2,4-Trichlorobenzene

    January 1, 2007 – December 31, 2007

    Resolved

  • 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

    —

    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

    —

    o-Dichlorobenzene

    January 1, 2007 – December 31, 2007

    Resolved

  • Treatment Technique (SWTR and GWR)

    Health-based

    Surface Water Treatment Rule

    April 1, 2006 – April 30, 2006

    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)

Enforcement actions

Common questions

Is CASTLE ROCK MUNICIPAL WATER required to publish a Consumer Confidence Report?

Yes. CASTLE ROCK MUNICIPAL WATER is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is CASTLE ROCK MUNICIPAL WATER’s next Consumer Confidence Report due?

CASTLE ROCK MUNICIPAL WATER’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does CASTLE ROCK MUNICIPAL WATER have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for CASTLE ROCK MUNICIPAL WATER.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

CASTLE ROCK MUNICIPAL WATER

Phone not on record

CASTLE ROCK, WA 98611