Waldo Waterworks, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 0.35 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 Waldo Waterworks
Waldo Waterworks serves about 500 people through 185 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 Sheboygan County, Wisconsin. EPA system ID: WI4600456. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Waldo Waterworks is 8.7 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0.35 ppb |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 8.7 ppb |
| 2017 | 1.11 ppb |
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. Waldo Waterworks's 0.35 ppb sits at the 23rd percentile in Wisconsin and the 42nd nationally (higher means more lead).
Other water systems in Sheboygan County
16 other systems share Sheboygan County; 13 of them have a higher latest lead result than Waldo Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sheboygan Water Utilities | 49,931 | 2.2 ppb |
| Plymouth Utilities | 8,964 | 6.17 ppb |
| Sheboygan Falls Utilities | 8,687 | 5.4 ppb |
| Sheboygan Tn Waterworks | 4,596 | 2.9 ppb |
| Oostburg Waterworks | 3,110 | 10.5 ppb |
| Kohler Waterworks | 2,271 | 0.82 ppb |
| Cedar Grove Waterworks | 2,213 | 8.9 ppb |
| Random Lake Waterworks | 1,594 | 0.53 ppb |
| Elkhart Lake Waterworks | 1,567 | 0.54 ppb |
| Kettle Moraine Correctional Institution | 1,544 | 0.34 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Waldo, 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 Waldo Waterworks whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1811 ppb (copper action level 1,300 ppb).
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. Systems that went over once often dip back under; here is what that means.