Aqua Illinois-Vermilion County, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 9 ppb (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. 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.
Who runs the water here
Aqua Illinois-Vermilion County serves about 30,106 people through 19,261 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Vermilion County, Illinois. EPA system ID: IL1835120; phone on file: 224-602-6779. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 4 ppb from 13 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Aqua Illinois-Vermilion County is 13 ppb across 5 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 9 ppb |
| 2025 | 13 ppb over 10 |
| 2023 | 4.8 ppb |
| 2020 | 6.5 ppb |
| 2017 | 8.3 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. Aqua Illinois-Vermilion County's 9 ppb sits at the 95th percentile in Illinois and the 97th nationally (higher means more lead).
Neighbouring systems
19 other systems share Vermilion County; 0 of them have a higher latest lead result than Aqua Illinois-Vermilion County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hoopeston | 5,802 | 0 (not detected) |
| Georgetown | 4,200 | 0 (not detected) |
| Westville | 3,917 | 1.3 ppb |
| Catlin | 2,380 | 0 (not detected) |
| Il American-Oakwood | 1,600 | 2.4 ppb |
| Rossville | 1,331 | 0 (not detected) |
| Ridge Farm | 973 | 0 (not detected) |
| Bismarck Community Water District | 900 | 0 (not detected) |
| Fairmount | 690 | 0 (not detected) |
| Potomac | 650 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Glenview, 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 Aqua Illinois-Vermilion County 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. Systems that went over once often dip back under; here is what that means.