Drinking Water Compliance OS

HELENA, MT · Lewis and Clark County

TEN MILE AND PLEASANT VALLEY WUA 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 Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

System facts

System ID (PWSID)
MT0002005
System type
Community Water System
Population served
750
Service connections
310
Ownership
privately owned
Water source
groundwater (wells)

Violation history

  • Lead Consumer Notice

    —

    Lead and Copper Rule

    January 1, 2026

    Unaddressed

  • OCCT/SOWT Study/Recommendation

    Health-based

    Lead and Copper Rule

    April 1, 2024 – June 26, 2024

    Resolved

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

    —

    Lead and Copper Rule

    April 1, 2024 – June 26, 2024

    Resolved

  • Consumer Confidence Report Inadequate Reporting

    —

    Consumer Confidence Rule

    October 1, 2023 – October 13, 2023

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2023 – February 12, 2024

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2022 – July 11, 2022

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    July 1, 2021 – September 30, 2021

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2021 – July 19, 2021

    Resolved

  • Monitoring, Regular

    —

    Styrene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Toluene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    Benzene

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    July 1, 2021 – September 30, 2021

    Resolved

  • Monitoring, Routine (RTCR)

    —

    Revised Total Coliform Rule

    June 1, 2021 – June 30, 2021

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Total Haloacetic Acids (HAA5)

    September 1, 2014 – August 31, 2015

    Resolved

  • Monitoring and Reporting (DBP)

    —

    TTHM

    September 1, 2014 – August 31, 2015

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2014 – July 18, 2014

    Resolved

  • Monitoring, Source Water (GWR)

    —

    E. COLI

    May 13, 2014 – April 7, 2016

    Resolved

  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    May 1, 2014 – May 31, 2014

    Resolved

  • Monitoring, Routine Minor (TCR)

    —

    Coliform (TCR)

    October 1, 2011 – October 31, 2011

    Resolved

  • Monitoring, Source Water (GWR)

    —

    E. COLI

    September 1, 2011 – November 18, 2011

    Resolved

  • Monitoring, Source Water (GWR)

    —

    E. COLI

    September 1, 2011 – November 18, 2011

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2011 – August 8, 2011

    Resolved

  • Monitoring, Regular

    —

    Dalapon

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    cis-1,2-Dichloroethylene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    o-Dichlorobenzene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    trans-1,2-Dichloroethylene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloroethane

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1,1-Trichloroethane

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Trichloroethylene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    1,1,2-Trichloroethane

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Tetrachloroethylene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Benzene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Ethylbenzene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Cadmium

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Chromium

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Nickel

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Thallium, Total

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    Selenium

    January 1, 2011 – December 12, 2013

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2011 – December 12, 2013

    Resolved

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    October 1, 2008 – August 25, 2009

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2006 – December 31, 2006

    Resolved

  • Initial Tap Sampling for Pb and Cu

    —

    Lead and Copper Rule

    July 1, 2005 – June 25, 2007

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 2005 – June 30, 2005

    Resolved

  • Monitoring, Regular

    —

    Thallium, Total

    January 1, 2005 – December 31, 2007

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2004 – December 31, 2004

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 2004 – June 30, 2004

    Resolved

  • Monitoring and Reporting (DBP)

    —

    TTHM

    January 1, 2004 – December 31, 2004

    Resolved

  • Monitoring and Reporting (DBP)

    —

    Total Haloacetic Acids (HAA5)

    January 1, 2004 – December 31, 2004

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    July 1, 2002 – December 31, 2002

    Resolved

  • Monitoring, Regular

    —

    1,1-Dichloroethylene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Carbon tetrachloride

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    1,2-Dichloropropane

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    CHLOROBENZENE

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Toluene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Styrene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Vinyl chloride

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    p-Dichlorobenzene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Endrin

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Beryllium, Total

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Antimony, Total

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Nickel

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Mercury

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Fluoride

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Cadmium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Barium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 2002 – December 31, 2004

    Resolved

  • Water Quality Parameter M/R

    —

    Lead and Copper Rule

    January 1, 2002 – June 30, 2002

    Resolved

  • Monitoring, Regular

    —

    Selenium

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    1,2,4-Trichlorobenzene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Pentachlorophenol

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Benzo(a)pyrene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    HEXACHLOROBENZENE

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    2,4,5-TP

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    2,4-D

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Heptachlor epoxide

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    LASSO

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Atrazine

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Aldicarb

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Carbofuran

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Aldicarb sulfone

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Aldicarb sulfoxide

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Hexachlorocyclopentadiene

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Dinoseb

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Picloram

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Di(2-ethylhexyl) phthalate

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    OXAMYL

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    BHC-GAMMA

    January 1, 2002 – December 31, 2004

    Resolved

  • Monitoring, Regular

    —

    Arsenic

    January 1, 1996 – December 31, 1998

    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

PARKER, JO

406-442-3939

HELENA, MT 59604