ST MARYS WATER SYSTEM
PWSID: LA1015023 · Plain Dealing, LA · Serves 294 people
ST MARYS WATER SYSTEM has 22 health-based violations out of 22 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
ST MARYS WATER SYSTEM (PWSID LA1015023) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 294 people in Plain Dealing, LA, and is subject to primacy enforcement by the Louisiana drinking-water program.
The system's federal compliance record contains 22 total violations, with 22 classified as health-based (MCL exceedances or treatment-technique failures). 4 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Fluoride, Gross Alpha. Recorded violations span 2014–2025.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Louisiana state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- LA1015023
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Plain Dealing, LA
- Population Served
- 294
- Health Violations
- Yes (22)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Total Trihalomethanes (TTHM) | 12 | 12 |
| Fluoride | 8 | 8 |
| Gross Alpha | 1 | 1 |
| E. coli | 1 | 1 |
Violation History (22)
| Contaminant | Health | Date |
|---|---|---|
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2025 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2025 |
| Gross Alpha | Yes | Oct 17, 2024 |
| Fluoride | Yes | Mar 23, 2023 |
| Fluoride | Yes | Mar 23, 2023 |
| Fluoride | Yes | Mar 23, 2023 |
| Fluoride | Yes | Mar 23, 2023 |
| Fluoride | Yes | Mar 23, 2023 |
| Fluoride | Yes | Mar 23, 2023 |
| E. coli | Yes | Mar 14, 2023 |
| Fluoride | Yes | Mar 1, 2021 |
| Total Trihalomethanes (TTHM) | Yes | Oct 1, 2019 |
| Total Trihalomethanes (TTHM) | Yes | Jul 1, 2019 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2019 |
| Fluoride | Yes | Jan 2, 2019 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2019 |
| Total Trihalomethanes (TTHM) | Yes | Jul 1, 2018 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2016 |
| Total Trihalomethanes (TTHM) | Yes | Oct 1, 2015 |
| Total Trihalomethanes (TTHM) | Yes | Jul 1, 2015 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2015 |
| Total Trihalomethanes (TTHM) | Yes | Jul 1, 2014 |
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.