Town Of Mamou Water System, LA
Lead detected, under the action levels
Latest 90th-percentile lead: 7 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Town Of Mamou Water System at a glance
Town Of Mamou Water System serves about 4,559 people through 1,660 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Evangeline Parish County, Louisiana. EPA system ID: LA1039005; phone on file: 337-468-3272. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Town Of Mamou Water System's lead record
That is up 3.6 ppb from 3.4 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Town Of Mamou Water System is 7 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 7 ppb |
| 2025 | 3.4 ppb |
| 2024 | 2 ppb |
| 2023 | 3 ppb |
| 2023 | 4 ppb |
| 2021 | 1 ppb |
| 2020 | 6 ppb |
| 2017 | 1 ppb |
Against other Louisiana systems
Of the 802 Louisiana systems with a lead result, the median latest reading is 0.72 ppb; 4 are over 15 ppb right now and 30 have gone over at some point. Town Of Mamou Water System's 7 ppb sits at the 97th percentile in Louisiana and the 95th nationally (higher means more lead).
Nearby utilities
12 other systems share Evangeline Parish County; 0 of them have a higher latest lead result than Town Of Mamou Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Ville Platte Water System | 6,590 | 0 (not detected) |
| East Side Water System | 5,718 | 0 (not detected) |
| Village Of Turkey Creek Water System | 5,289 | 0 (not detected) |
| Bayou Des Cannes Water System | 4,530 | 1 ppb |
| Point Blue/Chataiginer Water System | 3,471 | 0 (not detected) |
| Reddell Vidrine Water District | 2,952 | 0 (not detected) |
| Evangeline Ww District 1 - Pine Prairie | 2,598 | 0.64 ppb |
| Town Of Basile Water System | 2,559 | 2 ppb |
| Te Mamou Water District | 2,259 | 0 (not detected) |
| Pine Prairie Correctional Facility | 900 | 0.26 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Mamou, LA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Town Of Mamou Water System whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1700 ppb (copper action level 1,300 ppb).
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.