Butler Waterworks, WI
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Butler Waterworks serves about 2,181 people through 807 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 surface water, in Waukesha County, Wisconsin. EPA system ID: WI2680191. Ask the utility on your bill for your address in their service line inventory.
Butler Waterworks's lead record
Against the period ending 2020 (0.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Butler Waterworks is 0.31 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 0.3 ppb |
| 2017 | 0.31 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. Butler Waterworks's reported as 0 (not detected) sits at the 15th percentile in Wisconsin and the 31st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
71 other systems share Waukesha County; 66 of them have a higher latest lead result than Butler Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Waukesha Water Utility | 70,718 | 0.56 ppb |
| Brookfield Water Utility | 29,070 | 1.5 ppb |
| New Berlin Water Utility | 27,899 | 0.33 ppb |
| Menomonee Falls Ww - Surface Water | 23,867 | 2.1 ppb |
| Oconomowoc Waterworks | 15,805 | 6.8 ppb |
| Sussex Village Hall & Water Utility | 11,750 | 1.8 ppb |
| Hartland Waterworks | 9,212 | 4.2 ppb |
| Pewaukee City Water And Sewer Utility | 8,671 | 2.6 ppb |
| Mukwonago Waterworks | 8,190 | 3.2 ppb |
| Pewaukee Village Waterworks | 8,166 | 1 ppb |
Next steps for Butler, WI
Look up your address in Butler Waterworks's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Butler 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. A zero today does not rule out a jump later - the rules are tightening in 2027.