Mayville Waterworks, WI
Exceeded the action level in the past
Latest 90th-percentile lead: 3.3 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Mayville Waterworks serves about 5,112 people through 1,893 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 Dodge County, Wisconsin. EPA system ID: WI1140057. Ask the utility on your bill for your address in their service line inventory.
Mayville Waterworks's lead record
Against the period ending 2022 (4.2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mayville Waterworks is 27 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.3 ppb |
| 2022 | 4.2 ppb |
| 2022 | 3.6 ppb |
| 2020 | 27 ppb over 15 |
| 2017 | 13 ppb over 10 |
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. Mayville Waterworks's 3.3 ppb sits at the 78th percentile in Wisconsin and the 84th nationally (higher means more lead).
Other water systems in Dodge County
22 other systems share Dodge County; 4 of them have a higher latest lead result than Mayville Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Beaver Dam Water Utility | 16,200 | 11.3 ppb |
| Waupun Utilities | 8,056 | 1.2 ppb |
| Waupun Correctional Inst | 3,706 | 0.87 ppb |
| Horicon Waterworks | 3,682 | 3.2 ppb |
| Lomira Waterworks | 2,701 | 8.2 ppb |
| Juneau Waterworks | 2,627 | 2.7 ppb |
| Fox Lake Correctional Institution | 1,850 | 0 (not detected) |
| Fox Lake Waterworks | 1,610 | 0.79 ppb |
| Theresa Waterworks | 1,262 | 0.67 ppb |
| Hustisford Waterworks | 1,063 | 0.37 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Mayville, 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 Mayville 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. More in what a past exceedance means today.