Silvis, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 4.1 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. 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.
Silvis at a glance
Silvis serves about 7,473 people through 2,800 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Rock Island County, Illinois. EPA system ID: IL1610700; phone on file: 309-792-9181. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Silvis's lead record
That is down 8.9 ppb from 13 ppb in the period ending 2026. The highest 90th-percentile result EPA holds for Silvis is 13 ppb across 10 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4.1 ppb |
| 2026 | 13 ppb over 10 |
| 2025 | 1.7 ppb |
| 2025 | 0 (not detected) |
| 2025 | 8.5 ppb |
| 2024 | 2.7 ppb |
| 2023 | 6.2 ppb |
| 2022 | 0 (not detected) |
| 2020 | 5.5 ppb |
| 2017 | 11 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. Silvis's 4.1 ppb sits at the 85th percentile in Illinois and the 88th nationally (higher means more lead).
Neighbouring systems
46 other systems share Rock Island County; 5 of them have a higher latest lead result than Silvis. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Moline | 44,500 | 1.3 ppb |
| Rock Island | 39,018 | 0 (not detected) |
| East Moline | 21,374 | 16 ppb |
| Rock Island Arsenal, Us Army | 7,800 | 0 (not detected) |
| Milan | 4,945 | 7.18 ppb |
| Coal Valley | 3,873 | 0 (not detected) |
| Carbon Cliff | 2,134 | 0 (not detected) |
| Hampton | 1,863 | 1.3 ppb |
| Port Byron | 1,668 | 6 ppb |
| Silvis Heights Water Corp | 1,450 | 9.68 ppb |
Next steps for Silvis, IL
Test your own tap with a certified lab first-draw sample; Silvis, 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 Silvis 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. Systems that went over once often dip back under; here is what that means.