Mineral Point Waterworks, WI
Above the federal action level
Latest 90th-percentile lead: 37 ppb (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. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.
Who runs the water here
Mineral Point Waterworks serves about 2,487 people through 921 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 Iowa County, Wisconsin. EPA system ID: WI1250084. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is up 22 ppb from 15 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Mineral Point Waterworks is 37 ppb across 3 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 37 ppb over 15 |
| 2020 | 15 ppb over 10 |
| 2017 | 6.1 ppb |
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. Mineral Point Waterworks's 37 ppb sits at the 100th percentile in Wisconsin and the 100th nationally (higher means more lead).
Neighbouring systems
14 other systems share Iowa County; 0 of them have a higher latest lead result than Mineral Point Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Dodgeville Waterworks | 4,583 | 1.4 ppb |
| Barneveld Waterworks | 1,258 | 1.9 ppb |
| Arena Waterworks | 877 | 1.1 ppb |
| Highland Waterworks | 842 | 0 (not detected) |
| Ridgeway Waterworks | 690 | 3.48 ppb |
| Linden Waterworks | 547 | 2.2 ppb |
| Avoca Waterworks | 545 | 0 (not detected) |
| House On The Rock Resort | 470 | 1.78 ppb |
| Cobb Waterworks | 458 | 0 (not detected) |
| Rewey Waterworks | 290 | 0 (not detected) |
Your move
Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Mineral Point 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. Systems that went over once often dip back under; here is what that means.