Nanih-Waiya Water Association, MS
Exceeded the action level in the past
Latest 90th-percentile lead: 0.5 ppb (monitoring period 2024-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Nanih-Waiya Water Association
Nanih-Waiya Water Association serves about 1,127 people through 421 service connections, which makes it a small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Winston County, Mississippi. EPA system ID: MS0800015. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Nanih-Waiya Water Association is 17.9 ppb across 9 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0.5 ppb |
| 2023 | 0 (not detected) |
| 2022 | 0.8 ppb |
| 2021 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 0 (not detected) |
| 2016 | 17.9 ppb over 15 |
| 2016 | 0 (not detected) |
Where this result ranks
Of the 973 Mississippi systems with a lead result, the median latest reading is 1 ppb; 9 are over 15 ppb right now and 44 have gone over at some point. Nanih-Waiya Water Association's 0.5 ppb sits at the 22nd percentile in Mississippi and the 43rd nationally (higher means more lead).
Nearby utilities
10 other systems share Winston County; 6 of them have a higher latest lead result than Nanih-Waiya Water Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Louisville | 7,545 | 0 (not detected) |
| Highpoint Water Association #1 | 1,940 | 3.26 ppb |
| Town Of Noxapater | 1,713 | 0 (not detected) |
| Liberty-Plattsburg W/A #2 | 1,412 | 0 (not detected) |
| Bond Water Association #1 | 1,299 | 2.5 ppb |
| Ellison Ridge Water Assn | 1,287 | 0 (not detected) |
| Southeast Noxapater Water Assn | 1,188 | 11.8 ppb |
| Pugh'S Mill Water Association | 924 | 5.8 ppb |
| Calvary Water Association | 900 | 0.7 ppb |
| City Of Louisville - Northeast | 780 | 2.3 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Louisville, MS 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 Nanih-Waiya Water Association whether it covers that cost before hiring anyone - many utilities now do.
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. What a 90th-percentile result does and does not tell you: how to read a lead result. Why an old exceedance still matters: over the limit before, under it now.