Public water system record
Town of Mamou Water System
Serves an area of Evangeline Parish, LA that includes Mamou · 4,559 people served
Federal records show 23 health-based violations and 8 monitoring/reporting issues for Town of Mamou Water System in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.
System profile
- Health-based violations, last 10 years
- 23
- Resolved
- 23
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 8
Key facts
- Town of Mamou Water System draws water from 2 wells.
- Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.074 mg/L, federal limit 0.06 mg/L (1.2 times the limit), 2022.
- Most recent formal enforcement: compliance order (no penalty) by Louisiana, May 2018.
- Record on file since 1982, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 1,610 unknown out of 1,610 service lines.
Check whether Town of Mamou 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 |
|---|---|---|---|---|
|
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, 2023 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.074 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
220 | Oct 1, 2022 | 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 | Jul 1, 2022 | 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 | Jul 1, 2022 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Apr 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2022 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.066 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Jan 1, 2022 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2021 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.067 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Oct 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 | Jul 1, 2021 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Apr 1, 2021 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 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 | Jan 1, 2021 | 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 | Oct 1, 2020 | 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, 2020 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Jul 1, 2020 | 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, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 65 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 66 µg/L, federal limit 60 µg/L (1.1 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 92 µg/L, federal limit 80 µg/L (1.2 times the limit)
|
220 | Oct 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 90 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
220 | Jul 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 96 µg/L, federal limit 80 µg/L (1.2 times the limit)
|
220 | Apr 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 90 µg/L, federal limit 80 µg/L (1.1 times the limit)
|
220 | Jan 1, 2017 | 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
|
Jul 21, 2022 | Resolved |
|
Public Notice
OTHER
|
Jul 21, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Public Notice
OTHER
|
Mar 25, 2018 | Resolved |
|
Public Notice
OTHER
|
Feb 21, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 25, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 31, 2016 | Resolved |
Full record since 1982
EPA's records for Town of Mamou Water System go back to 1982. Before October 19, 2016 they list 3 health-based violations (2 resolved, 1 archived by EPA without a recorded fix) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 0 |
| 2000s | 1 | 1 |
| 2010 to October 18, 2016 | 1 | 2 |
| October 19, 2016 to 2019 | 7 | 4 |
| 2020s | 16 | 4 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2016, Resolved.
Show all 3 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)
|
Jul 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Fluoride
Contaminant limit exceeded
|
Jul 25, 1982 | Archived |
Enforcement actions
Louisiana regulators took 2 formal enforcement actions against Town of Mamou Water System between 2009 and 2018. The most recent was a compliance order (no penalty) in May 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 8, 2018 | Louisiana | Compliance order (no penalty) | 25 violations (24 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs), Lead and Copper Rule |
| May 8, 2009 | Louisiana | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
What the violations mean
Total Trihalomethanes (TTHMs)
13 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Haloacetic Acids (HAA5)
10 incidentsHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Where the water comes from
Town of Mamou Water System draws water from 2 wells.
Annual water quality report
Town of Mamou 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.
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