Il American-Nettle Creek, 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.
Il American-Nettle Creek at a glance
Il American-Nettle Creek serves about 317 people through 122 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Grundy County, Illinois. EPA system ID: IL0630040; phone on file: 618-874-2408. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Il American-Nettle Creek is 5 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 5 ppb |
| 2020 | 1 ppb |
| 2020 | 0 (not detected) |
| 2018 | 3 ppb |
Against other Illinois systems
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. Il American-Nettle Creek's reported as 0 (not detected) sits at the 14th percentile in Illinois and the 19th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
18 other systems share Grundy County; 5 of them have a higher latest lead result than Il American-Nettle Creek. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Morris | 14,775 | 0 (not detected) |
| Minooka | 12,800 | 0 (not detected) |
| Coal City | 5,845 | 0 (not detected) |
| Diamond | 2,508 | 0 (not detected) |
| Gardner | 1,361 | 0 (not detected) |
| Mazon | 994 | 0 (not detected) |
| Shady Oaks Mhp | 912 | 0 (not detected) |
| Braceville | 800 | 2.08 ppb |
| South Wilmington | 710 | 0 (not detected) |
| Bookwalter Woods Mhp | 389 | 0 (not detected) |
What to do in your house
Look up your address in Il American-Nettle Creek'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 Il American-Nettle Creek whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1692 ppb (copper action level 1,300 ppb).
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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.