Hoyleton, IL
Lead reported as not detected
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 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.
Who runs the water here
Hoyleton serves about 658 people through 263 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 surface water, in Washington County, Illinois. EPA system ID: IL1890200; phone on file: 618-532-8569. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hoyleton is 2 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2022 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 2 ppb |
How Hoyleton 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. Hoyleton's reported as 0 (not detected) sits at the 25th percentile in Illinois and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Washington County
14 other systems share Washington County; 7 of them have a higher latest lead result than Hoyleton. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Washington County Water Company | 12,040 | 2 ppb |
| Nashville | 3,230 | 0 (not detected) |
| Okawville | 1,457 | 2.1 ppb |
| Irvington | 1,081 | 0 (not detected) |
| Hoyleton Rwc | 1,020 | 0 (not detected) |
| Ashley | 565 | 1.9 ppb |
| New Minden | 343 | 0 (not detected) |
| Richview | 251 | 0 (not detected) |
| Brookside Meadows Mhp | 250 | 3.8 ppb |
| Dubois | 200 | 2.2 ppb |
What to do in your house
Look up your address in Hoyleton'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 Hoyleton 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. Small systems behave differently: why small systems go over more often.