Drinking Water Compliance OS

Tohatchi, NN

Chuska Community Boarding School BIA Water System

Current status

1 item on record is 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 Navajo Nation’s official records. Always confirm current status with Navajo Nation before making decisions based on this information.

System facts

System ID (PWSID)
NN3536003
System type
Community Water System
Population served
348
Service connections
87
Ownership
federal government
Water source
groundwater (wells)

Violation history

  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    September 1, 2025 – September 30, 2025

    Archived
  • Report Sample Result/Fail Monitor (RTCR)

    Revised Total Coliform Rule

    April 1, 2025

    Unaddressed
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    February 1, 2025 – February 12, 2025

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2024 – December 10, 2024

    Resolved
  • Monitoring, Regular

    Nitrite

    January 1, 2024 – December 10, 2024

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2022 – December 31, 2024

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2022 – December 31, 2024

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2021 – January 31, 2021

    Resolved
  • Report Sample Result/Fail Monitor (RTCR)

    Revised Total Coliform Rule

    May 1, 2020 – June 18, 2020

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

    Lead and Copper Rule

    January 1, 2017 – March 28, 2018

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

    Lead and Copper Rule

    July 1, 2016 – September 22, 2016

    Resolved
  • Sample Siting Plan Errors (RTCR)

    Revised Total Coliform Rule

    April 1, 2016 – March 28, 2018

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    July 1, 2015 – July 31, 2015

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 2012 – December 31, 2012

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Atrazine

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Toxaphene

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Heptachlor

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Fluoride

    January 1, 2008 – December 31, 2010

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Dalapon

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    2,4-D

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Diquat

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Dinoseb

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Endothall

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Methoxychlor

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Glyphosate

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Chlordane

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Endrin

    January 1, 2008 – September 29, 2009

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 2008 – September 29, 2009

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2006 – March 13, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2005 – March 13, 2007

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    October 1, 2004 – October 31, 2004

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Benzene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Toluene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 2004 – December 31, 2004

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

    Lead and Copper Rule

    January 1, 2004 – December 22, 2005

    Resolved
  • Monitoring, Regular

    Trichloroethylene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Endrin

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Methoxychlor

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Toxaphene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Dalapon

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Diquat

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Endothall

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Glyphosate

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Dinoseb

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Aldicarb sulfoxide

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Aldicarb sulfone

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Aldicarb

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Atrazine

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Heptachlor

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    2,4-D

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Chlordane

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    p-Dichlorobenzene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,1,1-Trichloroethane

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    Carbon tetrachloride

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,2-Dichloropropane

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Regular

    1,1,2-Trichloroethane

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Repeat Minor (TCR)

    Coliform (TCR)

    August 1, 2003 – August 31, 2003

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2003 – August 31, 2003

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 2001 – December 31, 2001

    Resolved

Archived closed in EPA's records (typically due to age or a data correction)Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

Contact

BIA Chuska Community School

5057332700

Tohatchi, NM 87325-0321