Fci-Marion, IL
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Fci-Marion
Fci-Marion serves about 1,544 people through 1 service connections, which makes it a small system under EPA's size classes. It is federally owned and draws surface water, in Williamson County, Illinois. EPA system ID: IL1995247; phone on file: 618-964-1441. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Fci-Marion is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
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. Fci-Marion's reported as 0 (not detected) sits at the 38th percentile in Illinois and the 29th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
23 other systems share Williamson County; 5 of them have a higher latest lead result than Fci-Marion. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Marion | 16,855 | 1.2 ppb |
| Herrin | 12,747 | 9.8 ppb |
| Lake Of Egypt Pwd | 11,368 | 0 (not detected) |
| Carterville | 6,528 | 7.54 ppb |
| Coal Valley Pwd | 4,023 | 0 (not detected) |
| Corinth Pwd | 3,927 | 4.57 ppb |
| Johnston City | 3,509 | 0 (not detected) |
| Pittsburg | 2,948 | 0 (not detected) |
| Cambria | 1,727 | 0 (not detected) |
| Crainville | 1,711 | 0 (not detected) |
Your move
Look up your address in Fci-Marion's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Fci-Marion 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. A zero today does not rule out a jump later - the rules are tightening in 2027.