Corney Water System, LA
Exceeded the action level in the past
Latest 90th-percentile lead: 1.9 ppb (monitoring period 2023-2025). 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.
Who runs the water here
Corney Water System serves about 249 people through 83 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Union Parish County, Louisiana. EPA system ID: LA1111002; phone on file: 318-285-0561. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (1.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Corney Water System is 17 ppb across 4 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.9 ppb |
| 2022 | 1.7 ppb |
| 2021 | 17 ppb over 15 |
| 2018 | 4 ppb |
Where this result ranks
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. Corney Water System's 1.9 ppb sits at the 72nd percentile in Louisiana and the 68th nationally (higher means more lead).
Neighbouring systems
17 other systems share Union Parish County; 3 of them have a higher latest lead result than Corney Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Town Of Farmerville Water System | 5,352 | 1.3 ppb |
| Darbonne Ws South | 3,261 | 0 (not detected) |
| Darbonne Ws North | 3,186 | 0 (not detected) |
| Holmesville Water System | 2,406 | 0 (not detected) |
| Point Wilhite Ws | 2,292 | 0 (not detected) |
| Town Of Bernice Water System | 1,863 | 0 (not detected) |
| Rocky Branch Water System | 1,650 | 1.6 ppb |
| Linville-Haile Water System | 1,635 | 2.4 ppb |
| Union Parish Waterworks District 1 | 1,626 | 0.75 ppb |
| Wards Chapel Water System | 1,620 | 1.2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Lillie, 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 Corney Water System 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. The lead result guide covers how utilities pick the homes they sample. More in what a past exceedance means today.