Drinking Water Compliance OS

Parker, 09

Colorado River Regional Water System 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)
090400051
System type
Community Water System
Population served
8,490
Service connections
1,860
Ownership
Native American tribal
Water source
groundwater (wells)

Violation history

  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    December 1, 2025 – December 31, 2025

    Archived
  • Monitoring and Reporting (DBP)

    Chlorine

    October 1, 2025 – December 31, 2025

    Archived
  • Report Sample Result/Fail Monitor (RTCR)

    Revised Total Coliform Rule

    March 1, 2025 – April 22, 2025

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2025 – December 31, 2025

    Archived
  • Lead Consumer Notice

    Lead and Copper Rule

    October 29, 2023 – March 19, 2024

    Resolved
  • Monitoring, Regular

    Fluoride

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Regular

    Arsenic

    January 1, 2023 – December 31, 2025

    Archived
  • Monitoring, Routine (IDSE)

    TTHM

    January 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2021 – December 31, 2021

    Resolved
  • Monitoring, Routine (IDSE)

    Total Haloacetic Acids (HAA5)

    January 1, 2021 – December 31, 2021

    Resolved
  • Treatment Technique, Level 1 Assessment (RTCR)

    Health-based

    Revised Total Coliform Rule

    April 1, 2020 – June 11, 2020

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2017 – December 31, 2017

    Resolved
  • Maximum Contaminant Level Violation, E. coli (RTCR)

    Health-based

    Revised Total Coliform Rule

    September 1, 2016 – September 30, 2016

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    June 1, 2016 – June 30, 2016

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 2016 – December 31, 2016

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 2015 – October 31, 2015

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    October 1, 2015 – June 27, 2016

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    June 1, 2015 – June 30, 2015

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    June 1, 2015 – June 27, 2016

    Resolved
  • Public Notification Violation for NPDWR Violation

    Public Notice

    May 1, 2015 – June 27, 2016

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    May 1, 2015 – May 31, 2015

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    May 1, 2014 – May 31, 2014

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    May 1, 2014 – May 31, 2014

    Resolved
  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    March 31, 2014 – October 22, 2014

    Resolved
  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    March 31, 2014 – January 26, 2016

    Resolved
  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    March 31, 2014 – November 16, 2015

    Resolved
  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    March 31, 2014 – November 16, 2015

    Resolved
  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    March 31, 2014 – October 22, 2014

    Resolved
  • Failure To Address Deficiency

    Health-based

    Groundwater Rule

    March 31, 2014 – January 1, 2014

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

    Lead and Copper Rule

    January 1, 2014 – September 26, 2017

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    January 1, 2012 – March 17, 2012

    Resolved
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    January 1, 2012 – March 17, 2012

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    April 1, 2011 – June 30, 2011

    Resolved
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    April 1, 2011 – June 30, 2011

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    April 1, 2011 – June 30, 2011

    Resolved
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    January 1, 2011 – March 31, 2011

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    January 1, 2011 – March 31, 2011

    Resolved
  • Maximum Contaminant Level Violation, Average

    Health-based

    TTHM

    January 1, 2011 – March 31, 2011

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    October 1, 2010 – December 31, 2010

    Resolved
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    October 1, 2010 – December 31, 2010

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    August 1, 2008 – August 31, 2008

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 2007 – October 31, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2006 – July 11, 2007

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2005 – January 20, 2009

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2004 – January 20, 2009

    Resolved
  • Monitoring and Reporting (DBP)

    Total Haloacetic Acids (HAA5)

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring and Reporting (DBP)

    TTHM

    January 1, 2004 – December 31, 2004

    Resolved
  • Monitoring, Routine Minor (TCR)

    Coliform (TCR)

    February 1, 2003 – February 28, 2003

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2002 – September 14, 2004

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    February 1, 2001 – February 28, 2001

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2000 – June 21, 2004

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    October 1, 1998 – October 31, 1998

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    April 1, 1997 – April 30, 1997

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    March 1, 1996 – March 31, 1996

    Resolved
  • Monitoring, Routine Major (TCR)

    Coliform (TCR)

    December 1, 1994 – December 31, 1994

    Resolved
  • Monitoring, Repeat Minor (TCR)

    Coliform (TCR)

    October 1, 1994 – October 31, 1994

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    July 1, 1992 – February 23, 2004

    Resolved

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

Enforcement actions

Contact

CRIT Council

9286699211

Parker, AZ 85344