Southeast Joliet Sd, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.87 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
Southeast Joliet Sd serves about 2,000 people through 627 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 Will County, Illinois. EPA system ID: IL1977490; phone on file: 815-724-4222. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Southeast Joliet Sd's lead record
That is up 2.87 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Southeast Joliet Sd is 2.87 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.87 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
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. Southeast Joliet Sd's 2.87 ppb sits at the 79th percentile in Illinois and the 80th nationally (higher means more lead).
Neighbouring systems
49 other systems share Will County; 11 of them have a higher latest lead result than Southeast Joliet Sd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Joliet | 160,000 | 6.53 ppb |
| Il American-West Suburban | 73,978 | 0 (not detected) |
| Romeoville | 50,458 | 8.22 ppb |
| Plainfield | 50,000 | 0 (not detected) |
| New Lenox | 29,200 | 0 (not detected) |
| Il American-Homer Township | 24,543 | 0 (not detected) |
| Frankfort | 24,000 | 0.98 ppb |
| Lockport | 23,100 | 7.6 ppb |
| Crest Hill | 20,223 | 2.14 ppb |
| Mokena | 19,887 | 0 (not detected) |
Next steps for Joliet, IL
Test your own tap with a certified lab first-draw sample; Joliet, 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 Southeast Joliet Sd 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.