Tremont, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 1.2 ppb (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.
Tremont at a glance
Tremont serves about 2,114 people through 1,104 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 groundwater, in Tazewell County, Illinois. EPA system ID: IL1790700; phone on file: 309-925-5711. They can tell you what your service line is made of and whether they pay to replace it.
Tremont's lead record
Against the period ending 2025 (1.1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Tremont is 26 ppb across 15 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.2 ppb |
| 2025 | 1.1 ppb |
| 2025 | 2.5 ppb |
| 2025 | 0 (not detected) |
| 2024 | 1.9 ppb |
| 2024 | 2 ppb |
| 2023 | 3.6 ppb |
| 2022 | 15 ppb over 10 |
| 2021 | 4.1 ppb |
| 2021 | 2.4 ppb |
| 2020 | 6.3 ppb |
| 2020 | 8 ppb |
| 2019 | 7 ppb |
| 2017 | 20 ppb over 15 |
| 2016 | 26 ppb over 15 |
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. Tremont's 1.2 ppb sits at the 63rd percentile in Illinois and the 59th nationally (higher means more lead).
Other water systems in Tazewell County
28 other systems share Tazewell County; 11 of them have a higher latest lead result than Tremont. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Il American-Pekin | 31,731 | 1 ppb |
| East Peoria | 22,484 | 7 ppb |
| Morton | 17,117 | 0 (not detected) |
| Washington | 14,793 | 0 (not detected) |
| North Tazewell Pwd | 7,625 | 5.1 ppb |
| Creve Coeur | 4,934 | 2.1 ppb |
| Mackinaw | 3,399 | 0 (not detected) |
| Marquette Heights | 2,974 | 1.02 ppb |
| Groveland Township Water District | 2,185 | 5.2 ppb |
| Delavan | 1,743 | 0 (not detected) |
Next steps for Tremont, IL
Test your own tap with a certified lab first-draw sample; Tremont, 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 Tremont whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1600 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. 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.