Home/ Directory/ MT/ HAYS/WHITE COW CANYON WS

Water system · PWSID 083090044

HAYS/WHITE COW CANYON WS

HARLEM, MT · ~840 people served

Check your exact address → HARLEM overview
100
Excellent
PurityRadar safety score

PWSID

083090044

State

Montana

City

HARLEM

Population served

840

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

60

Violations on record

0

Unaddressed

4

Health-based

13

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2021. Official EPA record →

Treatment technique · EPA contaminant 0700 health-based began Jul 2019 Resolved
Monitoring & reporting · Total coliform began Oct 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2008 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2008 Resolved
Monitoring & reporting · Nitrate began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2039 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2955 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2008 Resolved
Monitoring & reporting · Nitrite began Jan 2008 Resolved

Recent enforcement actions

  • State action · SOX Feb 2021
  • EPA/federal action · EFR Dec 2013
  • State action · SOX Aug 2011
  • State action · SOX Aug 2011
  • State action · SIA May 2011
  • State action · SIA May 2011
  • State action · SIA May 2011
  • State action · SOX Jun 2010

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Arsenic

1 station · latest Sep 2024

2.4 · max 2.6 ug/L · 7

Copper

1 station · latest Sep 2024

0.4 · max 1.9 ug/L · 7

Lead

1 station · latest Sep 2024

0.43 · max 0.45 ug/L · 7

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system 083090044 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.