Olmsted, IL
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 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.
Olmsted at a glance
Olmsted serves about 435 people through 217 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Pulaski County, Illinois. EPA system ID: IL1530250; phone on file: 618-742-6487. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Olmsted's lead record
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Olmsted is 29.3 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 29.3 ppb over 15 |
| 2024 | 2.52 ppb |
| 2023 | 0 (not detected) |
| 2023 | 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. Olmsted's reported as 0 (not detected) sits at the 18th percentile in Illinois and the 21st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Pulaski County
5 other systems share Pulaski County; 1 of them has a higher latest lead result than Olmsted. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mounds | 1,011 | 0 (not detected) |
| Mound City | 526 | 0 (not detected) |
| Ullin | 496 | 12.4 ppb |
| Karnak | 432 | 0 (not detected) |
| Pulaski | 202 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Olmsted, 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 Olmsted 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. More in what a past exceedance means today.