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Public water system record

Water & Sewer Commission 4 of St Mary

Serves Charenton, St. Mary Parish, LA · 9,709 people served

Federal records show 5 health-based violations and no monitoring/reporting issues for Water & Sewer Commission 4 of St Mary in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.

  • LA1101011
  • CHARENTON
  • LA
  • 9,709 served

System profile

Source water Surface water
ZIP 70523
EPA system ID LA1101011

Verify this system on EPA ECHO →

Health-based violations, last 10 years
5
Resolved
5
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Water & Sewer Commission 4 of St Mary draws water from 2 surface water intakes.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit), 2024.
  • Most recent formal enforcement: compliance order (no penalty) by Louisiana, July 2008.
  • Record on file since 1992, with 10 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 4,100 service lines.

Check whether Water & Sewer Commission 4 of St Mary serves your address

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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 0.071 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Jan 1, 2025 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Oct 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2024 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 220 Jul 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Oct 1, 2023 Resolved No

Full record since 1992

EPA's records for Water & Sewer Commission 4 of St Mary go back to 1992. Before October 19, 2016 they list 10 health-based violations (6 resolved, 4 archived by EPA without a recorded fix) and 1 monitoring or reporting violation.

Violations that began in Health-based Monitoring and reporting
1990s 4 1
2000s 6 0
2020s 5 0

Most recent health-based violation before October 19, 2016: Total Coliform, began May 2008, Resolved.

Show all 10 health-based violations before October 19, 2016
Contaminant Start date Status
Total Coliform
Contaminant limit exceeded
 May 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83 µg/L, federal limit 80 µg/L (at or just above the limit)
 Apr 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 91 µg/L, federal limit 80 µg/L (1.1 times the limit)
 Jan 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 94 µg/L, federal limit 80 µg/L (1.2 times the limit)
 Oct 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 92 µg/L, federal limit 80 µg/L (1.2 times the limit)
 Jul 1, 2007 Resolved
Total Coliform
Contaminant limit exceeded
 Jun 1, 2004 Resolved
Total Coliform
Contaminant limit exceeded
 Sep 15, 1994 Archived
Surface Water Treatment Rule
Treatment technique failure
 Sep 1, 1993 Archived
Surface Water Treatment Rule
Treatment technique failure
 Aug 1, 1993 Archived
Surface Water Treatment Rule
Treatment technique failure
 Jul 1, 1993 Archived

Enforcement actions

Louisiana regulators took 1 formal enforcement action against Water & Sewer Commission 4 of St Mary in 2008. The most recent was a compliance order (no penalty) in July 2008.

Date By Action Violations covered
Jul 10, 2008 Louisiana Compliance order (no penalty) 3 violations (3 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Haloacetic Acids (HAA5)

3 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Total Trihalomethanes (TTHMs)

2 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Water & Sewer Commission 4 of St Mary draws water from 2 surface water intakes. 2 other public water systems have emergency connections to Water & Sewer Commission 4 of St Mary.

Annual water quality report

Water & Sewer Commission 4 of St Mary 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.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

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 Louisiana.

Certified drinking water labs by state EPA guidance for private wells