Sibley, IL
Exceeded the action level in the past
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 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 Sibley
Sibley serves about 245 people through 173 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Ford County, Illinois. EPA system ID: IL0530400. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 6.5 ppb from 6.5 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Sibley is 54 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 6.5 ppb |
| 2025 | 0 (not detected) |
| 2024 | 54 ppb over 15 |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
Against other Illinois systems
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. Sibley's reported as 0 (not detected) sits at the 11th percentile in Illinois and the 17th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
10 other systems share Ford County; 3 of them have a higher latest lead result than Sibley. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Paxton | 4,200 | 1.8 ppb |
| Gibson City | 3,500 | 0 (not detected) |
| Piper City | 875 | 7.43 ppb |
| Roberts | 367 | 0 (not detected) |
| Elliott | 269 | 0 (not detected) |
| Cabery | 266 | 0 (not detected) |
| Melvin | 200 | 0 (not detected) |
| Kempton | 177 | 0 (not detected) |
| Stelle Community Assn | 100 | 0 (not detected) |
| Beacon Paxton Llc | 55 | 2.1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Sibley, 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 Sibley whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1413 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. More in what a past exceedance means today.