Public Water Partners

Napavine, WA · Thurston County

PATTERSON LAKE WATER Water System

Consumer Confidence Report status

PATTERSON LAKE 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 PATTERSON LAKE 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)
WA5366573
System type
Community Water System
Population served
79
Service connections
17
Ownership
privately owned
Water source
groundwater (wells)

PATTERSON LAKE WATER is one of 3,227 community water systems in Washington in the 500 or fewer people size category, serving 79 people from groundwater.

As of August 1, 2026, its federal record holds 10 entries between 1979 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.

Of the 10, 9 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 the Total Coliform Rules, synthetic organic chemicals, and the Radionuclides and Revised Rad Rule.

Violation history

  • Monitoring, Regular

    —

    Diquat

    October 1, 2007 – December 31, 2007

    Resolved

  • Monitoring, Regular

    —

    Diquat

    July 1, 2007 – September 30, 2007

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    November 1, 1998 – November 30, 1998

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    December 1, 1996 – December 31, 1996

    Archived

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    October 1, 1996 – October 31, 1996

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    July 1, 1995 – July 31, 1995

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    January 1, 1993 – January 31, 1993

    Archived

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    January 1, 1992 – January 31, 1992

    Archived

  • Monitoring, Repeat Major (TCR)

    —

    Coliform (TCR)

    November 1, 1991 – November 30, 1991

    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 PATTERSON LAKE WATER required to publish a Consumer Confidence Report?

Yes. PATTERSON LAKE 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 PATTERSON LAKE WATER’s next Consumer Confidence Report due?

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

Does PATTERSON LAKE WATER have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for PATTERSON LAKE 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

PATTERSON LAKE WATER

Phone not on record

Napavine, WA 98565