Port Wing Sanitary District, WI
Exceeded the action level in the past
Latest 90th-percentile lead: 0.65 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.
About Port Wing Sanitary District
Port Wing Sanitary District serves about 400 people through 148 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Bayfield County, Wisconsin. EPA system ID: WI8040094. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 3.15 ppb from 3.8 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Port Wing Sanitary District is 25.05 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0.65 ppb |
| 2021 | 3.8 ppb |
| 2021 | 2.4 ppb |
| 2020 | 25.05 ppb over 15 |
| 2019 | 4.6 ppb |
| 2018 | 1.36 ppb |
| 2017 | 3.8 ppb |
| 2016 | 5.4 ppb |
How Port Wing Sanitary District 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. Port Wing Sanitary District's 0.65 ppb sits at the 30th percentile in Wisconsin and the 45th nationally (higher means more lead).
Neighbouring systems
5 other systems share Bayfield County; 4 of them have a higher latest lead result than Port Wing Sanitary District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Washburn Waterworks | 2,280 | 4.6 ppb |
| Iron River Sanitary District | 600 | 1.3 ppb |
| Drummond Sanitary District | 500 | 1.25 ppb |
| Bayfield Waterworks | 488 | 4.1 ppb |
| Pikes Bay Marina | 45 | 0.58 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Port Wing, 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 Port Wing Sanitary District 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. Why an old exceedance still matters: over the limit before, under it now.