Gibson Water Authority, IN
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 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.
Gibson Water Authority at a glance
Gibson Water Authority serves about 4,835 people through 1,934 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 surface water, in Gibson County, Indiana. EPA system ID: IN5226009; phone on file: 812-768-6899. 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 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Gibson Water Authority is 6.5 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 6.5 ppb |
| 2016 | 0 (not detected) |
Against other Indiana systems
Of the 687 Indiana systems with a lead result, the median latest reading is 1.31 ppb; 6 are over 15 ppb right now and 36 have gone over at some point. Gibson Water Authority's reported as 0 (not detected) sits at the 29th percentile in Indiana and the 35th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Gibson County
8 other systems share Gibson County; 4 of them have a higher latest lead result than Gibson Water Authority. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Princeton Water Department | 10,875 | 2 ppb |
| Fort Branch Water Department | 4,020 | 0 (not detected) |
| Oakland City Water Department | 2,938 | 0 (not detected) |
| Owensville Water Works | 2,148 | 0 (not detected) |
| Haubstadt Water Department | 1,600 | 4.4 ppb |
| Francisco Water Department | 900 | 0.38 ppb |
| Patoka Water & Electric | 750 | 0 (not detected) |
| Hazleton Water Department | 288 | 1 ppb |
Your move
Look up your address in Gibson Water Authority'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 Gibson Water Authority 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.