Town of Mamou Water System
EPA ID: LA1039005 · 4,559 people served · 2 ZIP codes
ZipCheckup's reading of EPA SDWIS for Town of Mamou Water System (LA1039005): 13 past health-based violations, since resolved. Since the flagged events, Town of Mamou Water System resolved all 16 violations - compliant today, 4,559 residents served.
Data: EPA SDWIS
Service Area Map
Coverage area for Town of Mamou Water System Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Town of Mamou Water System serves a community with a median household income of $34,649 and an estimated 23,967 residents across its service area. Approximately 61% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. 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 pumped from underground aquifers. 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
Detected Contaminants
How Town of Mamou Water System compares to EPA limits
What This Means For You
Haloacetic Acids (HAA5) at 6 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Total Trihalomethanes (TTHM) at 7 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Lead and Copper Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 1 mg/L exceeds the EPA maximum of mg/L.
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →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 Trihalomethanes (TTHM) | Health-based | Resolved |
| October 1, 2022 | Total Trihalomethanes (TTHM) | Health-based | Resolved |
| July 21, 2022 | Lead and Copper Rule | Non-health-based | Resolved |
| July 1, 2022 | Total Trihalomethanes (TTHM) | Health-based | Resolved |
| July 1, 2022 | Haloacetic Acids (HAA5) | Health-based | Resolved |
| April 1, 2022 | Total Trihalomethanes (TTHM) | Health-based | Resolved |
| January 1, 2022 | Total Trihalomethanes (TTHM) | Health-based | Resolved |
| January 1, 2022 | Haloacetic Acids (HAA5) | Health-based | Resolved |
| October 1, 2021 | Total Trihalomethanes (TTHM) | Health-based | Resolved |
| October 1, 2021 | Haloacetic Acids (HAA5) | Health-based | Resolved |
| July 21, 2021 | Lead and Copper Rule | Non-health-based | Resolved |
| July 1, 2021 | Haloacetic Acids (HAA5) | Health-based | Resolved |
| July 1, 2021 | Surface Water Treatment Rule | Non-health-based | Resolved |
| April 1, 2021 | Haloacetic Acids (HAA5) | Health-based | Resolved |
| April 1, 2021 | Total Trihalomethanes (TTHM) | Health-based | Resolved |
| January 1, 2021 | Haloacetic Acids (HAA5) | Health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 7 | Yes |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 6 | Yes |
| Lead and Copper Rule | Treatment Failure | 2 | No |
| Surface Water Treatment Rule | Treatment Failure | 1 | No |
Health Risk Details
Total Trihalomethanes (TTHM) (EPA limit: 0.08 mg/L)
Bladder & rectal cancer risk; reproductive concerns At-risk groups: pregnant women, long-term consumers of chlorinated water, people who frequently shower in chlorinated water.
Removal methods: granular activated carbon (GAC), carbon block filter, point-of-entry aeration. Find the right filter →
Haloacetic Acids (HAA5) (EPA limit: 0.06 mg/L)
Cancer risk; reproductive & developmental effects At-risk groups: pregnant women, infants, long-term consumers of chlorinated municipal water.
Removal methods: 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 | N/A |
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
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
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 the full compliance record 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: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
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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title = {{Town of Mamou Water System (LA): 13 Health Violations}},
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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.