South Wayne 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.
South Wayne Waterworks at a glance
South Wayne Waterworks serves about 478 people through 177 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 Lafayette County, Wisconsin. EPA system ID: WI1330077. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 1.31 ppb from 1.31 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for South Wayne Waterworks is 1.31 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 1.31 ppb |
| 2017 | 0 (not detected) |
Where this result ranks
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. South Wayne 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.
Neighbouring systems
8 other systems share Lafayette County; 7 of them have a higher latest lead result than South Wayne Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Darlington Waterworks | 2,235 | 0.99 ppb |
| Shullsburg Waterworks | 1,222 | 6.12 ppb |
| Belmont Waterworks | 989 | 3.95 ppb |
| Benton Waterworks | 976 | 0.98 ppb |
| Argyle Waterworks | 823 | 6.67 ppb |
| Blanchardville Waterworks | 810 | 0 (not detected) |
| Gratiot Waterworks | 224 | 1.38 ppb |
| Wiota Sanitary District | 98 | 0.51 ppb |
Next steps for South Wayne, WI
Look up your address in South Wayne 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 South Wayne 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. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.