Drinking Water Compliance OS

Auberry, 09

Big Sandy Rancheria Water System

Current status

3 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

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 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)
090600121
System type
Community Water System
Population served
408
Service connections
62
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    January 1, 2025 – March 31, 2025

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    January 1, 2025

    Unaddressed
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    October 1, 2024 – December 31, 2024

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 1, 2024

    Unaddressed
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    July 1, 2024 – September 30, 2024

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    April 1, 2024 – June 28, 2024

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    April 1, 2024 – June 30, 2024

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    April 1, 2024

    Unaddressed
  • Monitoring, Regular

    Combined Uranium

    October 1, 2023 – December 31, 2023

    Resolved
  • Monitoring, Source Water (GWR)

    E. COLI

    March 1, 2023 – April 15, 2023

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2023 – February 28, 2023

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring and Reporting (DBP)

    Chlorine

    January 1, 2023 – March 31, 2023

    Resolved
  • Monitoring and Reporting (DBP)

    Chlorine

    April 1, 2022 – June 30, 2022

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2021 – December 31, 2023

    Archived
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2021 – December 31, 2023

    Archived
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    January 1, 2020 – December 31, 2025

    Archived
  • Monitoring, Source Water (GWR)

    E. COLI

    January 1, 2018 – July 17, 2020

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Arsenic

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Barium

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Cadmium

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Chromium

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    CYANIDE

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Fluoride

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Mercury

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Nitrate

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Nitrite

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Selenium

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Antimony, Total

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Beryllium, Total

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Thallium, Total

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Endrin

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Methoxychlor

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Toxaphene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Dalapon

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Diquat

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Endothall

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Glyphosate

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    OXAMYL

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Simazine

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Picloram

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Dinoseb

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Carbofuran

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Atrazine

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    LASSO

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Heptachlor

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    2,4-D

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Chlordane

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Benzene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Toluene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Styrene

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    October 1, 2017 – December 31, 2017

    Resolved
  • Monitoring, Regular

    LASSO

    July 1, 2017 – September 30, 2017

    Resolved
  • Monitoring, Regular

    Mercury

    July 1, 2017 – September 30, 2017

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    July 1, 2017 – September 30, 2017

    Resolved
  • Monitoring, Regular

    Nitrite

    July 1, 2017 – September 30, 2017

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    July 1, 2017 – September 30, 2017

    Resolved
  • Monitoring, Regular

    Combined Uranium

    October 1, 2016 – December 31, 2016

    Resolved
  • Monitoring, Source Water (GWR)

    E. COLI

    June 1, 2016 – November 29, 2016

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    January 1, 2014 – January 31, 2014

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    October 1, 2013 – October 31, 2013

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2013 – July 31, 2013

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    July 1, 2011 – September 30, 2011

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    April 1, 2011 – June 30, 2011

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    January 1, 2011 – March 31, 2011

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    October 1, 2010 – December 31, 2010

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    July 1, 2010 – September 30, 2010

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    April 1, 2010 – June 30, 2010

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    January 1, 2010 – March 31, 2010

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    October 1, 2009 – December 31, 2009

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    July 1, 2009 – September 30, 2009

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    April 1, 2009 – June 30, 2009

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    January 1, 2009 – March 31, 2009

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    October 1, 2008 – December 31, 2008

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    July 1, 2008 – September 30, 2008

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    April 1, 2008 – June 30, 2008

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    January 1, 2008 – March 31, 2008

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    November 1, 2007 – November 30, 2007

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    Combined Uranium

    October 1, 2007 – December 31, 2007

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    September 1, 2007 – September 30, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2006 – January 16, 2007

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    May 1, 2006 – May 31, 2006

    Resolved
  • Monitoring, Repeat Minor (TCR)

    Coliform (TCR)

    April 1, 2006 – April 30, 2006

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2005 – January 16, 2007

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    June 1, 2005 – June 30, 2005

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    May 1, 2005 – May 31, 2005

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    April 1, 2005 – April 30, 2005

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2005 – December 31, 2005

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    September 1, 2004 – September 30, 2004

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2004 – January 16, 2007

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2004 – June 30, 2004

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    March 1, 2004 – March 31, 2004

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    August 1, 2003 – August 31, 2003

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2003 – December 31, 2003

    Resolved
  • Maximum Contaminant Level Violation, Acute (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2002 – July 31, 2002

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2002 – January 16, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2001 – January 16, 2007

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    February 1, 2001 – February 28, 2001

    Resolved
  • Monitoring, Regular

    Radium-226

    January 1, 2001 – December 31, 2001

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2000 – January 16, 2007

    Resolved
  • Maximum Contaminant Level Violation, Acute (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2000 – June 30, 2000

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    April 1, 2000 – April 30, 2000

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    August 1, 1999 – August 31, 1999

    Resolved
  • Follow-up Or Routine LCR Tap M/R

    Lead and Copper Rule

    January 1, 1999 – February 24, 2004

    Resolved
  • Monitoring, Regular

    Radium-226

    January 1, 1998 – December 31, 1998

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    October 1, 1997 – October 31, 1997

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    July 1, 1996 – February 24, 2004

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 1996 – December 31, 1996

    Resolved
  • Monitoring, Regular

    2,4-D

    January 1, 1996 – December 31, 1996

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 1996 – December 31, 1996

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    January 1, 1996 – February 24, 2004

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 1996 – December 31, 1996

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    June 1, 1992 – June 30, 1992

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    May 1, 1992 – May 31, 1992

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 1991 – December 31, 1991

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    November 1, 1991 – November 30, 1991

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    October 1, 1991 – October 31, 1991

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    August 1, 1991 – August 31, 1991

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    June 1, 1991 – June 30, 1991

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    March 1, 1991 – March 31, 1991

    Resolved

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

Contact

Big Sandy Rancheria

5593740066

Auberry, CA 93602