Wyocena Waterworks, WI
Exceeded the action level in the past
Latest 90th-percentile lead: 2.7 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 Wyocena Waterworks
Wyocena Waterworks serves about 768 people through 284 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 Columbia County, Wisconsin. EPA system ID: WI1110124. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2020 (2.1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Wyocena Waterworks is 16.8 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2.7 ppb |
| 2020 | 2.1 ppb |
| 2019 | 3.9 ppb |
| 2018 | 2.8 ppb |
| 2018 | 2.6 ppb |
| 2017 | 16.8 ppb over 15 |
How Wyocena 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. Wyocena Waterworks's 2.7 ppb sits at the 71st percentile in Wisconsin and the 79th nationally (higher means more lead).
Other water systems in Columbia County
22 other systems share Columbia County; 8 of them have a higher latest lead result than Wyocena Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Portage Waterworks | 10,437 | 6.2 ppb |
| Columbus Utilities | 5,173 | 8.88 ppb |
| Wisconsin Dells Waterworks | 3,232 | 1.7 ppb |
| Lodi Waterworks | 3,146 | 18 ppb |
| Poynette Waterworks | 2,520 | 3.05 ppb |
| Pardeeville Waterworks | 2,151 | 1.7 ppb |
| Harmony Grove San Dist | 1,950 | 3.2 ppb |
| Randolph Water Dept | 1,800 | 1.3 ppb |
| Fall River Waterworks | 1,793 | 0.93 ppb |
| Rio Waterworks | 1,095 | 1.4 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Wyocena, 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 Wyocena 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. Why an old exceedance still matters: over the limit before, under it now.