Richmond, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 9.7 ppb (monitoring period 2026-2026). 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.
Richmond at a glance
Richmond serves about 2,089 people through 644 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 Mchenry County, Illinois. EPA system ID: IL1110750; phone on file: 815-678-4040. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 5.3 ppb from 15 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Richmond is 16 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 9.7 ppb |
| 2025 | 15 ppb over 10 |
| 2025 | 2.5 ppb |
| 2025 | 16 ppb over 15 |
| 2022 | 5.7 ppb |
| 2019 | 6.3 ppb |
| 2016 | 11 ppb over 10 |
How Richmond 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. Richmond's 9.7 ppb sits at the 96th percentile in Illinois and the 97th nationally (higher means more lead).
Neighbouring systems
31 other systems share Mchenry County; 0 of them have a higher latest lead result than Richmond. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Crystal Lake | 40,661 | 6.8 ppb |
| Algonquin | 30,700 | 1.96 ppb |
| Lake In The Hills | 28,661 | 0 (not detected) |
| Huntley | 28,495 | 1.1 ppb |
| Woodstock | 25,630 | 1.5 ppb |
| Mchenry | 22,335 | 6.7 ppb |
| Cary | 17,826 | 1.7 ppb |
| Harvard | 9,469 | 7.1 ppb |
| Il American-Whispering Hills | 8,300 | 0 (not detected) |
| Marengo | 7,572 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Richmond, 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 Richmond 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. More in what a past exceedance means today.