Public water system record
West Monroe Water System
Serves West Monroe and Claiborne, Ouachita Parish, LA · 16,005 people served
Federal records show 12 health-based violations and 1 monitoring/reporting issue for West Monroe Water System in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 12
- Resolved
- 12
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- West Monroe Water System draws water from 8 wells (3 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2023.
- Most recent formal enforcement: compliance order (no penalty) by Louisiana, April 2018.
- Record on file since 1991, with 15 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 5,443 service lines.
Check whether West Monroe 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 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2023 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 14, 2023 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 14, 2023 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 14, 2023 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 14, 2023 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 24, 2020 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 24, 2020 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 24, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 83 µg/L, federal limit 80 µg/L (at or just above the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82 µg/L, federal limit 80 µg/L (at or just above the limit)
|
220 | Apr 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
220 | Jan 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
220 | Oct 1, 2016 | 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 15, 2020 | Resolved |
Full record since 1991
EPA's records for West Monroe Water System go back to 1991. Before October 19, 2016 they list 15 health-based violations (12 resolved, 3 archived by EPA without a recorded fix) and 11 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 3 | 0 |
| 2000s | 8 | 4 |
| 2010 to October 18, 2016 | 4 | 7 |
| October 19, 2016 to 2019 | 3 | 0 |
| 2020s | 8 | 1 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.
Show all 15 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Oct 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 84 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Jan 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 87 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
Oct 1, 2013 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2012 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 101 µg/L, federal limit 80 µg/L (1.3 times the limit)
|
Jul 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 105 µg/L, federal limit 80 µg/L (1.3 times the limit)
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 106 µg/L, federal limit 80 µg/L (1.3 times the limit)
|
Jan 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 127 µg/L, federal limit 80 µg/L (1.6 times the limit)
|
Oct 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jul 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Dec 15, 1995 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Oct 15, 1993 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1991 | Archived |
Enforcement actions
Louisiana regulators took 2 formal enforcement actions against West Monroe Water System between 2006 and 2018. The most recent was a compliance order (no penalty) in April 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 6, 2018 | Louisiana | Compliance order (no penalty) | 6 violations (6 health-based): Total Trihalomethanes (TTHMs) |
| Apr 25, 2006 | Louisiana | Compliance order (no penalty) | 6 violations (6 health-based): Total Trihalomethanes (TTHMs) |
What the violations mean
Groundwater Rule
7 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)
5 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
West Monroe Water System draws water from 8 wells (3 of them for emergency, seasonal or other part-time use).
Annual water quality report
West Monroe 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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