Wilton 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.
Wilton Waterworks at a glance
Wilton Waterworks serves about 490 people through 263 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Monroe County, Wisconsin. EPA system ID: WI6420306. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Wilton Waterworks is 0 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 | 0 (not detected) |
How Wilton 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. Wilton Waterworks's reported as 0 (not detected) sits at the 10th percentile in Wisconsin and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Monroe County
10 other systems share Monroe County; 6 of them have a higher latest lead result than Wilton Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sparta Waterworks | 10,025 | 1.4 ppb |
| Fort Mccoy North Post | 10,000 | 1.7 ppb |
| Tomah Waterworks | 9,192 | 0 (not detected) |
| Cashton Waterworks | 1,120 | 4.5 ppb |
| Norwalk Waterworks | 653 | 0 (not detected) |
| Warrens Waterworks | 540 | 0 (not detected) |
| Kendall Waterworks | 458 | 2.36 ppb |
| Oakdale Waterworks | 317 | 0 (not detected) |
| Fort Mccoy South Post | 250 | 2.7 ppb |
| Cortland Acres | 145 | 2.29 ppb |
Your move
Look up your address in Wilton 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 Wilton 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.