Port Of West St Mary, LA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Port Of West St Mary serves about 400 people through 27 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in St. Mary Parish County, Louisiana. EPA system ID: LA1101013; phone on file: 337-828-4100. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Port Of West St Mary is 6 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2018 | 6 ppb |
How Port Of West St Mary compares
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. Port Of West St Mary's reported as 0 (not detected) sits at the 10th percentile in Louisiana and the 21st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in St. Mary Parish County
11 other systems share St. Mary Parish County; 7 of them have a higher latest lead result than Port Of West St Mary. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Morgan City Water System | 12,703 | 0 (not detected) |
| Water & Sewer Commission 4 Of St Mary | 9,709 | 0 (not detected) |
| City Of Patterson Water System | 8,456 | 0 (not detected) |
| City Of Franklin Water Supply | 8,325 | 2 ppb |
| St Mary Water & Sewer Comm #3 | 7,828 | 3.3 ppb |
| St Mary Parish W&S #2 Bayou Vista | 5,379 | 0.3 ppb |
| City Of Berwick | 5,024 | 0.7 ppb |
| St Mary Parish Water Sewerage Comm 1 | 2,823 | 0.82 ppb |
| St Mary Par Jt Water Sewer Commission 5 | 1,240 | 2 ppb |
| Glencoe Community Water System | 190 | 4 ppb |
Your move
Look up your address in Port Of West St Mary's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Port Of West St Mary whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1900 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. A zero today does not rule out a jump later - the rules are tightening in 2027.