Chilton Waterworks, WI
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 13 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
About Chilton Waterworks
Chilton Waterworks serves about 4,191 people through 1,732 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 Calumet County, Wisconsin. EPA system ID: WI4080222. Ask the utility on your bill for your address in their service line inventory.
Chilton Waterworks's lead record
Against the period ending 2020 (13 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Chilton Waterworks is 13 ppb across 3 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 13 ppb over 10 |
| 2020 | 13 ppb over 10 |
| 2017 | 8.6 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. Chilton Waterworks's 13 ppb sits at the 99th percentile in Wisconsin and the 98th nationally (higher means more lead).
Other water systems in Calumet County
9 other systems share Calumet County; 0 of them have a higher latest lead result than Chilton Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Harrison Utilities-Fka Waverly Sd | 5,500 | 0 (not detected) |
| Brillion Waterworks | 3,262 | 8.1 ppb |
| Sherwood Waterworks | 3,114 | 0 (not detected) |
| New Holstein Waterworks | 3,012 | 3.1 ppb |
| Hilbert Waterworks | 1,176 | 0.84 ppb |
| Stockbridge Waterworks | 680 | 0 (not detected) |
| Forest Junction Pub Util | 487 | 1.3 ppb |
| Lakeview Estates Mhp | 112 | 0.4 ppb |
| Country Aire Mobile Home Court Llc | 98 | 9.65 ppb |
Next steps for Chilton, WI
Test your own tap with a certified lab first-draw sample; Chilton, 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 Chilton 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. See what changes at 10 ppb in 2027.