Coon Valley Waterworks, WI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Coon Valley Waterworks serves about 765 people through 340 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 groundwater, in Vernon County, Wisconsin. EPA system ID: WI6630252. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Coon Valley Waterworks is 2.88 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 2.88 ppb |
How Coon Valley Waterworks compares
Of the 947 Wisconsin systems with a lead result, the median latest reading is 1.33 ppb; 6 are over 15 ppb right now and 71 have gone over at some point. Coon Valley Waterworks's reported as 0 (not detected) sits at the 12th percentile in Wisconsin and the 25th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
13 other systems share Vernon County; 10 of them have a higher latest lead result than Coon Valley Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Viroqua Waterworks | 4,362 | 4.42 ppb |
| Westby Waterworks | 2,400 | 1.46 ppb |
| Hillsboro Waterworks | 1,325 | 3.2 ppb |
| Stoddard Waterworks | 793 | 0 (not detected) |
| La Farge Waterworks | 712 | 0 (not detected) |
| Viola Waterworks | 667 | 1.22 ppb |
| Ontario Waterworks | 554 | 1.27 ppb |
| Readstown Waterworks | 395 | 1.46 ppb |
| Chaseburg Waterworks Village Of | 306 | 2.76 ppb |
| Genoa Waterworks | 264 | 7.83 ppb |
Next steps for Coon Valley, WI
Look up your address in Coon Valley Waterworks's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Coon Valley Waterworks 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. Small systems behave differently: why small systems go over more often.