Wrightstown Waterworks, WI
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). 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.
About Wrightstown Waterworks
Wrightstown Waterworks serves about 3,815 people through 1,412 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 surface water, in Brown County, Wisconsin. EPA system ID: WI4050464. Ask the utility on your bill for your address in their service line inventory.
Wrightstown Waterworks's lead record
That is down 3.8 ppb from 3.8 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Wrightstown Waterworks is 29.5 ppb across 9 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 3.8 ppb |
| 2024 | 6.2 ppb |
| 2023 | 29.5 ppb over 15 |
| 2020 | 6.3 ppb |
| 2019 | 0 (not detected) |
| 2018 | 3.6 ppb |
| 2017 | 9.2 ppb |
| 2017 | 2.6 ppb |
How Wrightstown Waterworks compares
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. Wrightstown Waterworks's reported as 0 (not detected) sits at the 16th percentile in Wisconsin and the 34th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Brown County
21 other systems share Brown County; 16 of them have a higher latest lead result than Wrightstown Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Green Bay Waterworks | 107,369 | 2.5 ppb |
| De Pere Waterworks Sa 1 | 25,660 | 0.66 ppb |
| Howard Waterworks | 21,133 | 1.2 ppb |
| Ashwaubenon Waterworks | 17,730 | 3.4 ppb |
| Bellevue Waterworks | 16,715 | 2.7 ppb |
| Allouez Waterworks | 13,923 | 5.9 ppb |
| Ledgeview Tn Sanitary Dist 2 | 7,602 | 2.1 ppb |
| Lawrence Waterworks | 5,398 | 0 (not detected) |
| Suamico Waterworks | 4,697 | 1.1 ppb |
| Pulaski Waterworks | 4,040 | 0.81 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Wrightstown, 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 Wrightstown 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. Why an old exceedance still matters: over the limit before, under it now.