Creve Coeur, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.1 ppb (monitoring period 2026-2028). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Creve Coeur at a glance
Creve Coeur serves about 4,934 people through 2,306 service connections, which makes it a medium-sized 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: IL1790100; phone on file: 309-699-6714. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 1.9 ppb from 4 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Creve Coeur is 4 ppb across 12 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 2.1 ppb |
| 2025 | 4 ppb |
| 2025 | 1.2 ppb |
| 2025 | 0 (not detected) |
| 2025 | 2.4 ppb |
| 2022 | 0 (not detected) |
| 2019 | 1.9 ppb |
| 2018 | 0 (not detected) |
| 2018 | 2.6 ppb |
| 2017 | 2.1 ppb |
| 2017 | 2.8 ppb |
| 2016 | 3.4 ppb |
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. Creve Coeur's 2.1 ppb sits at the 74th percentile in Illinois and the 74th nationally (higher means more lead).
Neighbouring systems
28 other systems share Tazewell County; 7 of them have a higher latest lead result than Creve Coeur. 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 |
| Mackinaw | 3,399 | 0 (not detected) |
| Marquette Heights | 2,974 | 1.02 ppb |
| Groveland Township Water District | 2,185 | 5.2 ppb |
| Tremont | 2,114 | 1.2 ppb |
| Delavan | 1,743 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Creve Coeur, 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 Creve Coeur whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.