Mineral, IL
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2028). 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 Mineral
Mineral serves about 250 people through 150 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 Bureau County, Illinois. EPA system ID: IL0110650; phone on file: 309-714-4745. 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 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mineral is 15.8 ppb across 11 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 0.61 ppb |
| 2023 | 0 (not detected) |
| 2022 | 5 ppb |
| 2021 | 1.28 ppb |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2018 | 15.8 ppb over 15 |
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. Mineral'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
23 other systems share Bureau County; 11 of them have a higher latest lead result than Mineral. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Princeton | 7,832 | 21 ppb |
| Spring Valley | 5,582 | 0 (not detected) |
| De Pue | 1,838 | 0 (not detected) |
| Walnut | 1,311 | 5.4 ppb |
| Ladd | 1,263 | 0 (not detected) |
| Wyanet | 886 | 19.5 ppb |
| Sheffield | 821 | 1.4 ppb |
| Tiskilwa | 740 | 0 (not detected) |
| Dalzell | 663 | 0 (not detected) |
| Lamoille | 660 | 22.3 ppb |
Next steps for Mineral, IL
Test your own tap with a certified lab first-draw sample; Mineral, 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 Mineral 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. What a 90th-percentile result does and does not tell you: how to read a lead result. More in what a past exceedance means today.