Drinking Water Compliance OS

Williams, 09

Cortina Rancheria Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of August 1, 2013. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in 09.

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 EPA Region 9’s official records. Always confirm current status with EPA Region 9 before making decisions based on this information.

System facts

System ID (PWSID)
090605055
System type
Community Water System
Population served
19
Service connections
11
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 2013 – January 31, 2013

    Archived
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    August 1, 2012 – August 31, 2012

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    July 1, 2012 – July 31, 2012

    Resolved
  • Monitoring, Source Water (GWR)

    E. COLI

    July 1, 2012 – November 8, 2012

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2008 – December 31, 2008

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    January 1, 2005 – January 31, 2005

    Resolved
  • Monitoring, Regular

    CYANIDE

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    September 1, 2003 – September 30, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2003 – August 31, 2003

    Resolved

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

Enforcement actions

Last known contact on file (system is inactive)

Kletsel Dehe Band of Wintun Indians

5304733274

Williams, CA 95987