Momence, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 3.4 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
Momence serves about 3,075 people through 1,384 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 Kankakee County, Illinois. EPA system ID: IL0910650; phone on file: 815-472-2430. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 3.9 ppb from 7.3 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Momence is 7.3 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3.4 ppb |
| 2025 | 7.3 ppb |
| 2025 | 4.1 ppb |
| 2024 | 6.6 ppb |
| 2021 | 5.9 ppb |
| 2018 | 1.8 ppb |
How Momence 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. Momence's 3.4 ppb sits at the 82nd percentile in Illinois and the 85th nationally (higher means more lead).
Other water systems in Kankakee County
16 other systems share Kankakee County; 2 of them have a higher latest lead result than Momence. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aqua Illinois-Kankakee | 80,000 | 1.9 ppb |
| Herscher | 1,600 | 0 (not detected) |
| Pembroke Township | 1,410 | 4.1 ppb |
| St Anne | 1,200 | 0 (not detected) |
| Sunny Acres Mhp | 750 | 1.2 ppb |
| Hopkins Park | 579 | 4.5 ppb |
| Lake Shannon | 500 | 0 (not detected) |
| Aqua Illinois-Sun River Terrace | 498 | 2.4 ppb |
| Buckingham | 300 | 3.3 ppb |
| Il Veterans Home-Manteno | 256 | - |
Next steps for Momence, IL
Test your own tap with a certified lab first-draw sample; Momence, 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 Momence 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. Systems that went over once often dip back under; here is what that means.