Water Werks, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 1.9 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
Water Werks serves about 43 people through 16 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Rock Island County, Illinois. EPA system ID: IL1615130; phone on file: 309-230-3348. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2022 (1.1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Water Werks is 8 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.9 ppb |
| 2022 | 1.1 ppb |
| 2019 | 8 ppb |
| 2016 | 6.9 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. Water Werks's 1.9 ppb sits at the 71st percentile in Illinois and the 68th nationally (higher means more lead).
Neighbouring systems
46 other systems share Rock Island County; 16 of them have a higher latest lead result than Water Werks. 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 |
Your move
Test your own tap with a certified lab first-draw sample; Coal Valley, 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 Water Werks 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.