Drinking Water Compliance OS

Gardnerville, 09

Washoe Tribe Carson Colony 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 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)
093200161
System type
Community Water System
Population served
450
Service connections
93
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Monitoring, Regular

    —

    Nitrate

    April 1, 2023 – June 30, 2023

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    July 1, 2020 – September 30, 2020

    Resolved

  • Monitoring, Regular

    —

    2,3,7,8-TCDD

    January 1, 2020 – December 31, 2022

    Resolved

  • Report Sample Result/Fail Monitor (RTCR)

    —

    Revised Total Coliform Rule

    December 1, 2019 – January 10, 2020

    Resolved

  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    July 27, 2017 – March 7, 2019

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 2017 – June 8, 2017

    Resolved

  • Initial, Follow-up, or Routine Source Water M/R

    —

    Lead and Copper Rule

    July 1, 2016 – June 8, 2017

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2016 – December 31, 2016

    Resolved

  • Sample Siting Plan Errors (RTCR)

    —

    Revised Total Coliform Rule

    April 1, 2016 – June 20, 2018

    Resolved

  • Failure Submit IDSE/Subpart V Plan Rpt

    —

    Stage 2 Disinfectants and Disinfection Byproducts Rule

    October 1, 2013 – June 20, 2018

    Resolved

  • Maximum Contaminant Level Violation, Single Sample

    Health-based

    Nitrate

    April 1, 2013 – June 30, 2013

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    March 1, 2013 – March 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2013 – March 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    July 1, 2012 – September 30, 2012

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2012 – June 28, 2013

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    April 1, 2012 – June 30, 2012

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2012 – March 31, 2012

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    2,3,7,8-TCDD

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2011 – December 31, 2013

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 2011 – December 31, 2013

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 2008 – May 9, 2011

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2004 – August 31, 2004

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    April 1, 2004 – April 30, 2004

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 2003 – October 31, 2003

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    May 1, 2003 – May 31, 2003

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2002 – August 21, 2006

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    March 1, 2002 – March 31, 2002

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    December 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    September 1, 2001 – September 30, 2001

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    June 1, 2001 – June 30, 2001

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    May 1, 2001 – May 31, 2001

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    April 1, 2001 – April 30, 2001

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    March 1, 2001 – March 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Asbestos

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    2,3,7,8-TCDD

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 2001 – December 31, 2001

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    October 1, 2000 – October 31, 2000

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2000 – August 21, 2006

    Resolved

  • Monitoring, Regular

    —

    Nitrate

    January 1, 2000 – December 31, 2000

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    ETHYLENE DIBROMIDE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Total Polychlorinated Biphenyls (PCB)

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Heptachlor

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    2,3,7,8-TCDD

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Radium-226

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    January 1, 1998 – January 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Simazine

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) adipate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Glyphosate

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Endothall

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Toxaphene

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Methoxychlor

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Diquat

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    Chlordane

    January 1, 1998 – December 31, 1998

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 1998 – December 31, 1998

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    January 1, 1998 – March 23, 2007

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    June 1, 1997 – June 30, 1997

    Resolved

  • Initial Tap Sampling for Pb and Cu

    —

    Lead and Copper Rule

    July 1, 1996 – March 23, 2007

    Resolved

  • Monitoring, Regular

    —

    Selenium

    January 1, 1996 – December 31, 1996

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 1996 – December 31, 1996

    Resolved

  • Monitoring, Regular

    —

    Chromium

    January 1, 1996 – December 31, 1996

    Resolved

  • Monitoring, Regular

    —

    Cadmium

    January 1, 1996 – December 31, 1996

    Resolved

  • Monitoring, Routine Major (TCR)

    —

    Coliform (TCR)

    January 1, 1996 – January 31, 1996

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 1996 – December 31, 1996

    Resolved

  • Initial Tap Sampling for Pb and Cu

    —

    Lead and Copper Rule

    January 1, 1996 – February 7, 2005

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 1996 – December 31, 1996

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Contact

Washoe Tribal Council

7752658600

Gardnerville, NV 89410