Blanchardville 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.
About Blanchardville Waterworks
Blanchardville Waterworks serves about 810 people through 300 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 Lafayette County, Wisconsin. EPA system ID: WI1330071. Ask the utility on your bill for your address in their service line inventory.
Blanchardville Waterworks's lead record
That is down 2.07 ppb from 2.07 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Blanchardville Waterworks is 5.88 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 2.07 ppb |
| 2017 | 5.88 ppb |
Against other Wisconsin systems
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. Blanchardville Waterworks's reported as 0 (not detected) sits at the 13th 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.
Other water systems in Lafayette County
8 other systems share Lafayette County; 7 of them have a higher latest lead result than Blanchardville 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 |
| South Wayne Waterworks | 478 | 0 (not detected) |
| Gratiot Waterworks | 224 | 1.38 ppb |
| Wiota Sanitary District | 98 | 0.51 ppb |
What to do in your house
Look up your address in Blanchardville 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 Blanchardville 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.