Bunker Hill, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Bunker Hill
Bunker Hill serves about 1,760 people through 938 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Macoupin County, Illinois. EPA system ID: IL1170100; phone on file: 618-585-4632. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 2 ppb from 3 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Bunker Hill is 3 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2025 | 3 ppb |
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Bunker Hill compares
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. Bunker Hill's 1 ppb sits at the 60th percentile in Illinois and the 54th nationally (higher means more lead).
Neighbouring systems
29 other systems share Macoupin County; 6 of them have a higher latest lead result than Bunker Hill. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Carlinville | 6,598 | 0 (not detected) |
| Staunton | 5,756 | 0 (not detected) |
| Brighton | 5,041 | 2.8 ppb |
| Gillespie | 3,737 | 0 (not detected) |
| Virden | 3,274 | 0 (not detected) |
| Mount Olive | 2,193 | 9.9 ppb |
| Girard | 1,885 | 2.7 ppb |
| Central Macoupin County Rwd | 1,883 | 0 (not detected) |
| Benld | 1,612 | 0.1 ppb |
| Nilwood | 1,394 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Bunker Hill, 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 Bunker Hill 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. The action level is dropping - the 10 ppb rule from 2027.