Limestone-Walters Pwd, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 1 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
Limestone-Walters Pwd serves about 2,023 people through 809 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 groundwater, in Peoria County, Illinois. EPA system ID: IL1430020; phone on file: 309-674-1932. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Limestone-Walters Pwd's lead record
Against the period ending 2025 (1.2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Limestone-Walters Pwd is 4.5 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 1.2 ppb |
| 2022 | 2.6 ppb |
| 2022 | 2.6 ppb |
| 2019 | 2.2 ppb |
| 2016 | 4.5 ppb |
| 2016 | 4.5 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. Limestone-Walters Pwd's 1 ppb sits at the 60th percentile in Illinois and the 54th nationally (higher means more lead).
Other water systems in Peoria County
19 other systems share Peoria County; 8 of them have a higher latest lead result than Limestone-Walters Pwd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Il American-Peoria | 137,575 | 11 ppb |
| Chillicothe | 6,660 | 1.4 ppb |
| Peoria Heights | 5,908 | 0 (not detected) |
| Pleasant Valley Pwd | 3,783 | 0 (not detected) |
| T-L Rural Water District | 2,243 | 0 (not detected) |
| Elmwood | 2,058 | 1.8 ppb |
| Princeville | 1,901 | 0 (not detected) |
| Dunlap | 1,603 | 2.3 ppb |
| Hanna City | 1,253 | 1.6 ppb |
| Il American-Glasford | 1,193 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Peoria, 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 Limestone-Walters Pwd 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.