Town of Mamou Water System
EPA ID: LA1039005 · 4,559 people served · 2 ZIP codes
ZipCheckup's reading of EPA records for Town of Mamou Water System (LA1039005): 13 health-based violations recorded since 2021. Looking at the EPA enforcement file for Town of Mamou Water System, 16 violations are listed in the dataset, and none is recorded as open for the 4,559 people in its service area.
Data: EPA SDWIS
Service Area Map
Coverage area for Town of Mamou Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Town of Mamou Water System have a median household income of $34,649 and about 23,967 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 61% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: On average, 100% of census tracts in the counties mapped to this service area are designated disadvantaged by the federal Climate and Economic Justice Screening Tool (CEJST, 2022 version). Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
Town of Mamou Water System's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Louisiana
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Town of Mamou Water System (EPA ID: LA1039005) is a community water system in Louisiana that serves approximately 4,559 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Violation History
Status breakdown for accepted records with record years 2021-2026: 16 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| January 1, 2023 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| October 1, 2022 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| July 21, 2022 | Public Notice | Non-health-based | Resolved |
| July 1, 2022 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| July 1, 2022 | TTHM | Health-based | Resolved |
| April 1, 2022 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| January 1, 2022 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| January 1, 2022 | TTHM | Health-based | Resolved |
| October 1, 2021 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| October 1, 2021 | TTHM | Health-based | Resolved |
| July 21, 2021 | Public Notice | Non-health-based | Resolved |
| July 1, 2021 | TTHM | Health-based | Resolved |
| July 1, 2021 | Consumer Confidence Rule | Non-health-based | Resolved |
| April 1, 2021 | TTHM | Health-based | Resolved |
| April 1, 2021 | Total Haloacetic Acids (HAA5) | Health-based | Resolved |
| January 1, 2021 | TTHM | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL Violation | 7 | Yes |
| TTHM | MCL Violation | 6 | Yes |
| Public Notice | Other (notice or report rule) | 2 | No |
| Consumer Confidence Rule | Other (notice or report rule) | 1 | No |
Health Risk Details
Total Trihalomethanes (TTHM) (EPA limit: 0.08 mg/L)
Long-term exposure is associated with increased cancer risk, including bladder cancer; possible reproductive effects At-risk groups: pregnant women, long-term consumers of chlorinated water.
Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), carbon block filter, point-of-entry aeration. Find the right filter →
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Increased risk of cancer
Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), carbon block filter, reverse osmosis. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.007 mg/L | No | 2026-06-30 |
The accepted LCR snapshot contains 1 reported copper action-level exceedance record for this PWSID. The source does not provide a verified copper level for publication.
Radon Risk in Service Area
2 of 2 ZIP records with known zones are in EPA Radon Zone 3.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by LA or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Town of Mamou Water System (LA1039005) on EPA.gov.
Frequently Asked Questions
Is Town of Mamou Water System water safe to drink?
The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Town of Mamou Water System; its 16 accepted 2021-2026 records are resolved or archived. Historical compliance status does not establish conditions at a specific tap.
How many people does Town of Mamou Water System serve?
Town of Mamou Water System serves approximately 4,559 people across 2 ZIP codes in Louisiana.
Where does Town of Mamou Water System get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: No PFAS Reported Above Reporting Levels
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were reported above UCMR5 minimum reporting levels.
EPA's April 2024 PFAS rule sets MCLs of 4 ppt for PFOA and PFOS and 10 ppt for PFHxS, PFNA and HFPO-DA (GenX); water systems must comply from 2029. Other PFAS compounds have no individual federal MCL. A state standard is shown only where this system's state has its own enforceable PFAS limit. Detection results are EPA UCMR5 samples, not a measurement at your tap.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Town of Mamou Water System (LA): 13 Health Violations. https://zipcheckup.com/water-system/la1039005/
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author = {{ZipCheckup}},
title = {{Town of Mamou Water System (LA): 13 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/la1039005/}
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What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Town of Mamou Water System (EPA ID: LA1039005) - request the latest Consumer Confidence Report or ask about specific contaminants.