Lebanon, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.1 ppb (monitoring period 2024-2026). 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.
Lebanon at a glance
Lebanon serves about 4,714 people through 1,929 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in St. Clair County, Illinois. EPA system ID: IL1630650; phone on file: 618-537-4976. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lebanon's lead record
That is down 10.1 ppb from 12.2 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Lebanon is 12.2 ppb across 6 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.1 ppb |
| 2025 | 12.2 ppb over 10 |
| 2025 | 1.2 ppb |
| 2023 | 4 ppb |
| 2020 | 3 ppb |
| 2017 | 9 ppb |
How Lebanon 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. Lebanon's 2.1 ppb sits at the 74th percentile in Illinois and the 74th nationally (higher means more lead).
Neighbouring systems
23 other systems share St. Clair County; 5 of them have a higher latest lead result than Lebanon. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Il American-East St Louis | 131,368 | 3 ppb |
| O Fallon | 46,603 | 0 (not detected) |
| Caseyville | 13,798 | 0 (not detected) |
| Cahokia Heights | 12,528 | 0 (not detected) |
| Mascoutah | 8,759 | 4.9 ppb |
| American Water Oper And Maintenance, Llc | 6,779 | 0 (not detected) |
| Freeburg | 4,707 | 1 ppb |
| Dupo | 4,684 | 0 (not detected) |
| Smithton | 4,381 | 0 (not detected) |
| Millstadt | 4,071 | 0 (not detected) |
Next steps for Lebanon, IL
Test your own tap with a certified lab first-draw sample; Lebanon, 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 Lebanon 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. Size matters more than most people expect: small vs large water systems.