Public Water Partners

DARBY, MT · Ravalli County

DARBY TOWN OF Water System

Consumer Confidence Report status

DARBY TOWN OF must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for DARBY TOWN OF.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
MT0000195
System type
Community Water System
Population served
850
Service connections
494
Ownership
local government
Water source
groundwater (wells)

DARBY TOWN OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 850 people from groundwater.

As of August 1, 2026, its federal record holds 95 entries between 1994 and 2024, all of which EPA lists as closed.

Of the 95, 89 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals, the Lead and Copper Rule, and volatile organic chemicals.

Violation history

  • OCCT/SOWT Treatment Installation/Demonstration

    Health-based

    Lead and Copper Rule

    August 6, 2024 – January 8, 2026

    Resolved
  • Monitoring, Routine (RTCR)

    Revised Total Coliform Rule

    May 1, 2023 – May 22, 2023

    Resolved
  • Consumer Confidence Report Complete Failure to Report

    Consumer Confidence Rule

    July 1, 2017 – July 27, 2017

    Resolved
  • Monitoring, Regular

    Combined Radium (-226 and -228)

    July 1, 2010 – September 30, 2010

    Resolved
  • Monitoring, Regular

    Gross Alpha, Excl. Radon and U

    July 1, 2010 – September 30, 2010

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    January 1, 2006 – June 30, 2006

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2005 – August 31, 2005

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    January 1, 2005 – June 30, 2005

    Resolved
  • OCCT/SOWT Study/Recommendation

    Health-based

    Lead and Copper Rule

    January 1, 2005 – July 5, 2007

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2004 – December 31, 2004

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    July 1, 2004 – February 9, 2007

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    October 1, 2003 – September 21, 2005

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    August 1, 2002 – August 31, 2002

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    July 1, 2002 – September 21, 2005

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2002 – December 31, 2002

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    October 1, 2001 – September 21, 2005

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2001 – December 31, 2001

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2001 – December 31, 2001

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    January 1, 2001 – June 30, 2001

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2000 – December 31, 2000

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2000 – December 31, 2000

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    July 1, 2000 – December 31, 2000

    Resolved
  • Initial Tap Sampling for Pb and Cu

    Lead and Copper Rule

    July 1, 2000 – February 9, 2007

    Resolved
  • Water Quality Parameter M/R

    Lead and Copper Rule

    January 1, 2000 – June 30, 2000

    Resolved
  • Maximum Contaminant Level Violation, Monthly (TCR)

    Health-based

    Coliform (TCR)

    July 1, 1999 – July 31, 1999

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Dinoseb

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Aldicarb sulfoxide

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Aldicarb

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Atrazine

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Heptachlor

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    HEXACHLOROBENZENE

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Pentachlorophenol

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    BHC-GAMMA

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Dalapon

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Diquat

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) phthalate

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Picloram

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Hexachlorocyclopentadiene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Aldicarb sulfoxide

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Aldicarb sulfone

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Carbofuran

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Atrazine

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    LASSO

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    2,3,7,8-TCDD

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Heptachlor

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Heptachlor epoxide

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    2,4,5-TP

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Benzo(a)pyrene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Total Polychlorinated Biphenyls (PCB)

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,2-DIBROMO-3-CHLOROPROPANE

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    ETHYLENE DIBROMIDE

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Chlordane

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Nickel

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Nickel

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Antimony, Total

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Beryllium, Total

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Thallium, Total

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Arsenic

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    2,4-D

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Vinyl chloride

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Tetrachloroethylene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Ethylbenzene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,2,4-Trichlorobenzene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    cis-1,2-Dichloroethylene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Xylenes, Total

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    DICHLOROMETHANE

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    o-Dichlorobenzene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,1-Dichloroethylene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    trans-1,2-Dichloroethylene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    1,2-Dichloroethane

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    CHLOROBENZENE

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Styrene

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Endrin

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Methoxychlor

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Diquat

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Endothall

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Glyphosate

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Di(2-ethylhexyl) adipate

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    OXAMYL

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Regular

    Simazine

    January 1, 1999 – December 31, 2001

    Resolved
  • Monitoring, Repeat Major (TCR)

    Coliform (TCR)

    August 1, 1998 – August 31, 1998

    Resolved
  • Monitoring, Regular

    Nitrate

    January 1, 1994 – December 31, 1994

    Resolved

Resolved addressed and confirmed by the state

Enforcement actions

Common questions

Is DARBY TOWN OF required to publish a Consumer Confidence Report?

Yes. DARBY TOWN OF is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is DARBY TOWN OF’s next Consumer Confidence Report due?

DARBY TOWN OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does DARBY TOWN OF have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show no open violations for DARBY TOWN OF.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

MCKINNEY, NANCY

406-821-3753

DARBY, MT 59829