Windcrest Subdivision, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.2 ppb (monitoring period 2023-2025). 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.
Who runs the water here
Windcrest Subdivision serves about 49 people through 19 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: IL0730040; phone on file: 309-269-2743. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 1.4 ppb from 0.8 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Windcrest Subdivision is 2.8 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.2 ppb |
| 2022 | 0.8 ppb |
| 2019 | 2.8 ppb |
| 2016 | 2.2 ppb |
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. Windcrest Subdivision's 2.2 ppb sits at the 74th percentile in Illinois and the 75th nationally (higher means more lead).
Other water systems in Henry County
38 other systems share Henry County; 10 of them have a higher latest lead result than Windcrest 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 Coal Valley, IL
Test your own tap with a certified lab first-draw sample; Coal Valley, 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 Windcrest Subdivision 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.