South Jacksonville, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 2 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.
About South Jacksonville
South Jacksonville serves about 3,501 people through 1,606 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 groundwater, in Morgan County, Illinois. EPA system ID: IL1370400; phone on file: 217-245-4803. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 2 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for South Jacksonville is 17 ppb across 9 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2025 | 17 ppb over 15 |
| 2024 | 2.1 ppb |
| 2020 | 1.7 ppb |
| 2020 | 4.9 ppb |
| 2019 | 2.4 ppb |
| 2017 | 2.7 ppb |
Where this result ranks
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. South Jacksonville's 2 ppb sits at the 72nd percentile in Illinois and the 72nd nationally (higher means more lead).
Nearby utilities
12 other systems share Morgan County; 3 of them have a higher latest lead result than South Jacksonville. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jacksonville | 19,903 | 0 (not detected) |
| Smg Water Coop | 3,110 | 2.7 ppb |
| North Morgan Water Coop | 2,763 | 0 (not detected) |
| Murrayville-Woodson Water Commission | 1,403 | 0 (not detected) |
| Waverly | 1,194 | 0 (not detected) |
| Meredosia | 1,075 | 15 ppb |
| Apple Creek Water Coop | 968 | 0 (not detected) |
| Franklin | 800 | 0 (not detected) |
| Chapin | 658 | 0 (not detected) |
| Alexander Water District | 442 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; South Jacksonville, 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 South Jacksonville 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. Why an old exceedance still matters: over the limit before, under it now.