Mauston Waterworks, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 0.94 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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Mauston Waterworks
Mauston Waterworks serves about 4,456 people through 1,646 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Juneau County, Wisconsin. EPA system ID: WI7290129. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 1.73 ppb from 2.67 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Mauston Waterworks is 2.67 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0.94 ppb |
| 2020 | 2.67 ppb |
| 2017 | 1.03 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. Mauston Waterworks's 0.94 ppb sits at the 39th percentile in Wisconsin and the 50th nationally (higher means more lead).
Nearby utilities
14 other systems share Juneau County; 12 of them have a higher latest lead result than Mauston Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| New Lisbon Waterworks | 2,526 | 1.4 ppb |
| Elroy Waterworks | 1,333 | 0 (not detected) |
| Necedah Waterworks | 844 | 4.47 ppb |
| Wonewoc Waterworks | 758 | 1.6 ppb |
| Camp Douglas Waterworks | 640 | 1.95 ppb |
| Lyndon Station Waterworks | 474 | 1.89 ppb |
| Wi Air National Guard Volk Field | 400 | 6.29 ppb |
| Union Center Waterworks | 225 | 0 (not detected) |
| Kountry Aire Est Mhp Iii | 210 | 4.3 ppb |
| Hustler Waterworks | 170 | 1.21 ppb |
Next steps for Mauston, WI
Test your own tap with a certified lab first-draw sample; Mauston, WI may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Mauston 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. The action level is dropping - the 10 ppb rule from 2027.