Lake County Pw- Hawthorn Woods, IL
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 13.8 ppb (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Who runs the water here
Lake County Pw- Hawthorn Woods serves about 675 people through 225 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 Lake County, Illinois. EPA system ID: IL0970450; phone on file: 847-377-7134. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lake County Pw- Hawthorn Woods's lead record
That is up 13.8 ppb from 0 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Lake County Pw- Hawthorn Woods is 13.8 ppb across 3 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 13.8 ppb over 10 |
| 2020 | 0 (not detected) |
| 2017 | 11.5 ppb over 10 |
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 County Pw- Hawthorn Woods's 13.8 ppb sits at the 98th percentile in Illinois and the 98th nationally (higher means more lead).
Neighbouring systems
103 other systems share Lake County; 3 of them have a higher latest lead result than Lake County Pw- Hawthorn Woods. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Waukegan | 87,149 | 10 ppb |
| Vernon Hills - Lake Co Pw | 33,207 | 0 (not detected) |
| Mundelein | 31,500 | 4.3 ppb |
| Gurnee | 30,193 | 0.3 ppb |
| Highland Park | 30,176 | 0 (not detected) |
| Round Lake Beach | 27,200 | 0 (not detected) |
| Zion | 24,442 | 11.2 ppb |
| Great Lakes Naval Training Station | 23,000 | 0 (not detected) |
| Grayslake | 21,248 | 11 ppb |
| Libertyville | 20,500 | 5.61 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Libertyville, 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 County Pw- Hawthorn Woods 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. Why sampled homes are the worst-case ones is in the guide to reading the number. This system is in the band the 2027 10 ppb rule changes.