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Public water system record

South Chester Water Dist

Serves an area of Liberty County, MT that includes Chester · 55 people served

Federal records show 2 health-based violations and 1 monitoring/reporting issue for South Chester Water Dist in the last ten years. The most serious issue in this window was a Haloacetic Acids (HAA5) violation that EPA lists as archived, not resolved.

  • MT0000007
  • CHESTER
  • MT
  • 55 served

System profile

Source water Purchased surface water
ZIP 59522
EPA system ID MT0000007

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
0
Unresolved
0
Archived by EPA
2
Any acute record
No
Monitoring issues, last 10 years
1

Key facts

  • South Chester Water Dist buys its water from Ncmrwa Tiber Service Area.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit), 2024.
  • Most recent formal enforcement: compliance order (no penalty) by Montana, April 2010.
  • Record on file since 1994, with 1 health-based violation before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 37 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 220 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 1, 2023 Resolved

Full record since 1994

EPA's records for South Chester Water Dist go back to 1994. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 46 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 40
2000s 1 3
2010 to October 18, 2016 0 3
2020s 2 1

Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began June 2009, Resolved.

Show the health-based violation before October 19, 2016
Contaminant Start date Status
Surface Water Treatment Rule
Treatment technique failure
 Jun 1, 2009 Resolved

Enforcement actions

Montana regulators took 1 formal enforcement action against South Chester Water Dist in 2010. The most recent was a compliance order (no penalty) in April 2010.

Date By Action Violations covered
Apr 28, 2010 Montana Compliance order (no penalty) 1 violation (1 health-based): Surface Water Treatment Rule

What the violations mean

Haloacetic Acids (HAA5)

2 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

South Chester Water Dist buys its water from Ncmrwa Tiber Service Area. It lists no wells or intakes of its own.

Buys water from

Annual water quality report

South Chester Water Dist must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask South Chester Water Dist for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Montana.

Certified drinking water labs by state EPA guidance for private wells