Silvis Heights Water Corp, IL
Exceeded the action level in the past
Latest 90th-percentile lead: 9.68 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.
Silvis Heights Water Corp at a glance
Silvis Heights Water Corp serves about 1,450 people through 495 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Rock Island County, Illinois. EPA system ID: IL1615750; phone on file: 309-792-9237. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 9.68 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Silvis Heights Water Corp is 32.8 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 9.68 ppb |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 32.8 ppb over 15 |
| 2021 | 13.9 ppb over 10 |
| 2020 | 2.57 ppb |
| 2017 | 0 (not detected) |
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 Heights Water Corp's 9.68 ppb sits at the 96th percentile in Illinois and the 97th nationally (higher means more lead).
Nearby utilities
46 other systems share Rock Island County; 1 of them has a higher latest lead result than Silvis Heights Water Corp. 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) |
| Silvis | 7,473 | 4.1 ppb |
| 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 |
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 Heights Water Corp whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1390 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. The lead result guide covers how utilities pick the homes they sample. More in what a past exceedance means today.