Geneseo Hills Subdivision, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 3.1 ppb (monitoring period 2025-2025). 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.
Geneseo Hills Subdivision at a glance
Geneseo Hills Subdivision serves about 500 people through 150 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Henry County, Illinois. EPA system ID: IL0735600; phone on file: 815-646-9122. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 1.9 ppb from 1.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Geneseo Hills Subdivision is 18 ppb across 12 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.1 ppb |
| 2025 | 1.2 ppb |
| 2024 | 1.3 ppb |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 1.7 ppb |
| 2022 | 2.4 ppb |
| 2021 | 18 ppb over 15 |
| 2020 | 2.1 ppb |
| 2016 | 3 ppb |
| 2016 | 2.3 ppb |
Where this result ranks
Of the 1,744 Illinois systems with a lead result, the median latest reading is 0 ppb; 22 are over 15 ppb right now and 152 have gone over at some point. Geneseo Hills Subdivision's 3.1 ppb sits at the 81st percentile in Illinois and the 83rd nationally (higher means more lead).
Nearby utilities
38 other systems share Henry County; 6 of them have a higher latest lead result than Geneseo Hills Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Kewanee | 12,509 | 3.3 ppb |
| Geneseo | 6,539 | 2.7 ppb |
| Colona West | 2,640 | 1.6 ppb |
| Colona East | 2,501 | 1 ppb |
| Galva | 2,449 | 1.4 ppb |
| Cambridge | 2,086 | 1.3 ppb |
| Orion | 1,754 | 5.5 ppb |
| Atkinson | 955 | 2.85 ppb |
| Annawan | 843 | 0 (not detected) |
| Woodhull | 771 | 1.5 ppb |
Next steps for Geneseo, IL
Test your own tap with a certified lab first-draw sample; Geneseo, IL 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 Geneseo Hills Subdivision whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 3900 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. Why an old exceedance still matters: over the limit before, under it now.