Harvard Hills Water Corporation, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 3.5 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.
Harvard Hills Water Corporation at a glance
Harvard Hills Water Corporation serves about 215 people through 86 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: IL1795450; phone on file: 815-674-0544. They can tell you what your service line is made of and whether they pay to replace it.
Harvard Hills Water Corporation's lead record
Against the period ending 2023 (2.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Harvard Hills Water Corporation is 28 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.5 ppb |
| 2023 | 2.5 ppb |
| 2023 | 2.3 ppb |
| 2022 | 28 ppb over 15 |
| 2019 | 5.7 ppb |
| 2016 | 2.4 ppb |
How Harvard Hills Water Corporation compares
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. Harvard Hills Water Corporation's 3.5 ppb sits at the 82nd percentile in Illinois and the 85th nationally (higher means more lead).
Neighbouring systems
28 other systems share Tazewell County; 5 of them have a higher latest lead result than Harvard Hills Water Corporation. 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 |
What to do in your house
Test your own tap with a certified lab first-draw sample; Washington, 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 Harvard Hills Water Corporation whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 2245 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. More in what a past exceedance means today.