Lake Windermere Estates Subdivision, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.7 ppb (monitoring period 2023-2025). 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.
Who runs the water here
Lake Windermere Estates Subdivision serves about 300 people through 106 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Tazewell County, Illinois. EPA system ID: IL1795730; phone on file: 309-696-8965. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 3.3 ppb from 6 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Lake Windermere Estates Subdivision is 6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.7 ppb |
| 2022 | 6 ppb |
| 2019 | 4 ppb |
| 2016 | 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. Lake Windermere Estates Subdivision's 2.7 ppb sits at the 78th percentile in Illinois and the 79th nationally (higher means more lead).
Neighbouring systems
28 other systems share Tazewell County; 6 of them have a higher latest lead result than Lake Windermere Estates Subdivision. 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 |
| Tremont | 2,114 | 1.2 ppb |
Your move
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 Lake Windermere Estates Subdivision 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. Size matters more than most people expect: small vs large water systems.