Public water system record
St Marys Water System
Serves an area of Bossier Parish, LA · 294 people served
Federal records show 16 health-based violations and 10 monitoring/reporting issues for St Marys Water System in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 16
- Resolved
- 8
- Unresolved
- 8
- Any acute record
- No
- Monitoring issues, last 10 years
- 10
Key facts
- St Marys Water System draws water from 2 wells.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2019.
- Most recent formal enforcement: compliance order (no penalty) by Louisiana, October 2025.
- Record on file since 1999, with 6 health-based violations before October 19, 2016.
Check whether St Marys Water System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2025 | Resolved | No |
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 23, 2023 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 23, 2023 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 23, 2023 | Active | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 23, 2023 |
Active
Enforcement action in place
|
No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 23, 2023 |
Active
Enforcement action in place
|
No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 23, 2023 |
Active
Enforcement action in place
|
No |
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Mar 14, 2023 |
Active
Enforcement action in place
|
No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 1, 2021 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Oct 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Apr 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 2, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2019 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82 µg/L, federal limit 80 µg/L (at or just above the limit)
|
220 | Jul 1, 2018 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Apr 29, 2025 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Dec 20, 2024 | Resolved |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Active |
|
Public Notice
OTHER
|
May 4, 2023 | Resolved |
|
Public Notice
OTHER
|
Apr 21, 2023 |
Active
Enforcement action in place
|
|
Lead and Copper Rule
Monitoring and reporting
|
Apr 5, 2022 | Resolved |
|
Public Notice
OTHER
|
Oct 16, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 31, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
May 1, 2014 | Resolved |
Full record since 1999
EPA's records for St Marys Water System go back to 1999. Before October 19, 2016 they list 6 health-based violations (6 resolved) and 18 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 1 | 1 |
| 2010 to October 18, 2016 | 5 | 16 |
| October 19, 2016 to 2019 | 6 | 2 |
| 2020s | 10 | 6 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began January 2016, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 90 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Jan 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 94 µg/L, federal limit 80 µg/L (1.2 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 92 µg/L, federal limit 80 µg/L (1.2 times the limit)
|
Jul 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 91 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Apr 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82 µg/L, federal limit 80 µg/L (at or just above the limit)
|
Jul 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2009 | Resolved |
Enforcement actions
Louisiana regulators and EPA took 5 formal enforcement actions against St Marys Water System between 2000 and 2025. The most recent was a compliance order (no penalty) in October 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 3, 2025 | Louisiana | Compliance order (no penalty) | 8 violations (4 health-based): Lead and Copper Rule, Groundwater Rule, Public Notice, Revised Total Coliform Rule |
| Aug 11, 2020 | Louisiana | Compliance order (no penalty) | 10 violations (10 health-based): Total Trihalomethanes (TTHMs) |
| May 19, 2016 | Louisiana | Compliance order (no penalty) | 12 violations (10 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs) |
| Nov 12, 2002 | EPA | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| May 16, 2000 | EPA | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
What the violations mean
Groundwater Rule
8 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Total Trihalomethanes (TTHMs)
6 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
St Marys Water System draws water from 2 wells.
Annual water quality report
St Marys Water System 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 St Marys Water System 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 Louisiana.
Certified drinking water labs by state EPA guidance for private wells