Drinking Water Compliance OS

Winslow, NN

Seba Dalkai Boarding School BIA Water System

Current status

4 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 Navajo Nation’s official records. Always confirm current status with Navajo Nation before making decisions based on this information.

System facts

System ID (PWSID)
NN0436019
System type
Community Water System
Population served
250
Service connections
20
Ownership
federal government
Water source
groundwater (wells)

Violation history

  • 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 28, 2025

    Resolved
  • Report Sample Result/Fail Monitor (RTCR)

    Revised Total Coliform Rule

    October 1, 2023 – November 30, 2023

    Resolved
  • Report Sample Result/Fail Monitor (RTCR)

    Revised Total Coliform Rule

    October 1, 2022 – November 17, 2022

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    April 1, 2022 – May 31, 2022

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    April 1, 2022 – May 31, 2022

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 1, 2021 – November 4, 2021

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2021 – December 31, 2021

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2021 – September 30, 2021

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2021 – June 30, 2021

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    April 1, 2021 – April 15, 2021

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    January 1, 2021 – January 31, 2021

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2021 – March 31, 2021

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2020 – December 31, 2020

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2020 – September 30, 2020

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    July 1, 2020

    Unaddressed
  • Report Sample Result/Fail Monitor (RTCR)

    Revised Total Coliform Rule

    May 1, 2020 – June 19, 2020

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2020 – June 30, 2020

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2020 – March 31, 2020

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 1, 2019

    Unaddressed
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2019 – December 31, 2019

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    July 1, 2019

    Unaddressed
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2019 – September 30, 2019

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    April 1, 2019 – April 12, 2019

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2019 – June 30, 2019

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2019 – March 31, 2019

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 1, 2018 – April 12, 2019

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    October 1, 2018 – December 31, 2018

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2018 – December 31, 2018

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    October 1, 2018 – December 31, 2018

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2018 – September 30, 2018

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2018 – June 30, 2018

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2018 – March 31, 2018

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2018 – March 31, 2018

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2018 – March 31, 2018

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2017 – December 31, 2017

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2017 – September 30, 2017

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2017 – June 30, 2017

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    April 1, 2017 – June 20, 2017

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2017 – March 31, 2017

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2016 – December 19, 2016

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2016 – September 30, 2016

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2016 – June 30, 2016

    Resolved
  • Sample Siting Plan Errors (RTCR)

    Revised Total Coliform Rule

    April 1, 2016 – July 12, 2019

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2016 – March 31, 2016

    Resolved
  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2016 – March 31, 2016

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2016 – March 31, 2016

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2015 – December 31, 2015

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    July 1, 2015 – September 30, 2015

    Resolved
  • Failure Submit IDSE/Subpart V Plan Rpt

    Stage 2 Disinfectants and Disinfection Byproducts Rule

    October 1, 2013 – February 23, 2023

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2013 – June 30, 2013

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2013 – March 20, 2013

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 2012 – December 31, 2012

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2012 – December 31, 2012

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2012 – August 31, 2012

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2012 – June 30, 2012

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2012 – March 31, 2012

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    October 1, 2010 – December 31, 2010

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    January 1, 2010 – December 31, 2010

    Resolved
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    January 1, 2010 – December 31, 2010

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

    Lead and Copper Rule

    January 1, 2008 – January 27, 2012

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2007 – August 31, 2007

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    May 1, 2006 – May 31, 2006

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2005 – August 31, 2005

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2005 – July 29, 2005

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    September 1, 2004 – September 30, 2004

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    August 1, 2004 – August 31, 2004

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

    Lead and Copper Rule

    January 1, 2004 – September 30, 2011

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    October 1, 2003 – October 31, 2003

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    September 1, 2003 – September 30, 2003

    Resolved
  • Monitoring, Repeat Minor (TCR)

    Coliform (TCR)

    August 1, 2003 – August 31, 2003

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    November 1, 2002 – November 30, 2002

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    November 1, 2002 – November 30, 2002

    Archived
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2002 – July 31, 2002

    Archived
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 2002 – July 31, 2002

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    May 1, 2002 – May 13, 2002

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 2001 – December 31, 2001

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    August 30, 1996 – September 29, 1996

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 14, 1996 – September 13, 1996

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 14, 1996 – September 13, 1996

    Archived
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    April 30, 1996 – May 29, 1996

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    April 30, 1996 – May 29, 1996

    Archived

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

Enforcement actions

Contact

BIA Seba Dalkai Boarding School, Inc

9286573208

Winslow, AZ 86047