Washington County Water Company, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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. 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
Washington County Water Company serves about 12,040 people through 4,854 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Washington County, Illinois. EPA system ID: IL1895600; phone on file: 618-327-4454. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2023 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Washington County Water Company is 4 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2 ppb |
| 2023 | 2 ppb |
| 2020 | 1 ppb |
| 2020 | 1 ppb |
| 2017 | 4 ppb |
| 2017 | 4 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. Washington County Water Company's 2 ppb sits at the 73rd percentile in Illinois and the 73rd nationally (higher means more lead).
Neighbouring systems
14 other systems share Washington County; 3 of them have a higher latest lead result than Washington County Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Nashville | 3,230 | 0 (not detected) |
| Okawville | 1,457 | 2.1 ppb |
| Irvington | 1,081 | 0 (not detected) |
| Hoyleton Rwc | 1,020 | 0 (not detected) |
| Hoyleton | 658 | 0 (not detected) |
| Ashley | 565 | 1.9 ppb |
| New Minden | 343 | 0 (not detected) |
| Richview | 251 | 0 (not detected) |
| Brookside Meadows Mhp | 250 | 3.8 ppb |
| Dubois | 200 | 2.2 ppb |
Next steps for Nashville, IL
Test your own tap with a certified lab first-draw sample; Nashville, 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 Washington County Water Company 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. Systems that went over once often dip back under; here is what that means.