Dunfermline-St David Water Commission, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.1 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
Dunfermline-St David Water Commission serves about 850 people through 528 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 surface water, in Fulton County, Illinois. EPA system ID: IL0575150; phone on file: 309-668-2435. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 1.2 ppb from 3.3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Dunfermline-St David Water Commission is 15 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.1 ppb |
| 2022 | 3.3 ppb |
| 2016 | 15 ppb over 10 |
Where this result ranks
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. Dunfermline-St David Water Commission's 2.1 ppb sits at the 73rd percentile in Illinois and the 74th nationally (higher means more lead).
Neighbouring systems
17 other systems share Fulton County; 4 of them have a higher latest lead result than Dunfermline-St David Water Commission. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Canton | 16,748 | 2.4 ppb |
| Il American-Farmington | 2,448 | 0 (not detected) |
| Lewistown | 2,400 | 0 (not detected) |
| South Fulton Water District | 1,430 | 2.2 ppb |
| Astoria | 1,375 | 1.3 ppb |
| Cuba | 1,232 | 0 (not detected) |
| Avon | 920 | 0 (not detected) |
| Wee-Ma-Tuk Water District | 863 | 0 (not detected) |
| Vermont | 738 | 0 (not detected) |
| Fairview | 588 | 1.2 ppb |
Next steps for St David, IL
Test your own tap with a certified lab first-draw sample; St David, 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 Dunfermline-St David Water Commission 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.