Hamilton County Regional Utility, IN
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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.
About Hamilton County Regional Utility
Hamilton County Regional Utility serves about 125 people through 1 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Hamilton County, Indiana. EPA system ID: IN5229027; phone on file: 317-776-1517. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 1.66 ppb from 1.66 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Hamilton County Regional Utility is 1.66 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 1.66 ppb |
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. Hamilton County Regional Utility's reported as 0 (not detected) sits at the 8th percentile in Indiana and the 11th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Hamilton County
13 other systems share Hamilton County; 7 of them have a higher latest lead result than Hamilton County Regional Utility. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Carmel Water Department | 99,927 | 2.94 ppb |
| Citizens Water Of Westfield, Llc | 61,493 | 3.09 ppb |
| Indiana American Water - Noblesville | 45,575 | 3 ppb |
| Cicero Water Department | 5,607 | 6.99 ppb |
| Indiana American Water - Sheridan | 4,435 | 2 ppb |
| Arcadia Water Department | 1,515 | 1.13 ppb |
| Atlanta Water Department | 735 | - |
| Carmel Clay Water | 393 | 0 (not detected) |
| Suburban Estates, Llc | 350 | 0 (not detected) |
| Indiana Academy | 113 | 2.2 ppb |
What to do in your house
Look up your address in Hamilton County Regional Utility'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 Hamilton County Regional Utility 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. Small systems behave differently: why small systems go over more often.