Oak Ridge Sanitary District, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 2.5 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. 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.
Who runs the water here
Oak Ridge Sanitary District serves about 300 people through 117 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 Woodford County, Illinois. EPA system ID: IL2035300; phone on file: 815-353-5282. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 2.5 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Oak Ridge Sanitary District is 30 ppb across 15 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.5 ppb |
| 2025 | 0 (not detected) |
| 2025 | 1.4 ppb |
| 2024 | 1.4 ppb |
| 2023 | 7 ppb |
| 2022 | 1.4 ppb |
| 2021 | 3.8 ppb |
| 2021 | 4.1 ppb |
| 2020 | 2.1 ppb |
| 2020 | 9.6 ppb |
| 2019 | 2.6 ppb |
| 2019 | 4.5 ppb |
| 2018 | 3.7 ppb |
| 2018 | 2 ppb |
| 2016 | 30 ppb over 15 |
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. Oak Ridge Sanitary District's 2.5 ppb sits at the 76th percentile in Illinois and the 77th nationally (higher means more lead).
Nearby utilities
18 other systems share Woodford County; 6 of them have a higher latest lead result than Oak Ridge Sanitary District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Eureka | 5,216 | 2.5 ppb |
| Caterpillar Trail Pwd | 5,125 | 0 (not detected) |
| Metamora | 3,895 | 5.7 ppb |
| El Paso | 2,900 | 3.5 ppb |
| Roanoke | 2,000 | 0 (not detected) |
| Minonk | 1,928 | 0 (not detected) |
| Washburn | 1,032 | 0 (not detected) |
| Goodfield | 936 | 7.4 ppb |
| Congerville | 497 | 0 (not detected) |
| Benson | 401 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Metamora, 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 Oak Ridge Sanitary District whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1700 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. The lead result guide covers how utilities pick the homes they sample. More in what a past exceedance means today.