Elroy 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
Elroy Waterworks serves about 1,333 people through 647 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 Juneau County, Wisconsin. EPA system ID: WI7290122. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 1.54 ppb from 1.54 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Elroy Waterworks is 1.54 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 1.54 ppb |
| 2017 | 0.69 ppb |
Against other Wisconsin systems
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. Elroy Waterworks's reported as 0 (not detected) sits at the 14th percentile in Wisconsin and the 28th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
14 other systems share Juneau County; 13 of them have a higher latest lead result than Elroy Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mauston Waterworks | 4,456 | 0.94 ppb |
| New Lisbon Waterworks | 2,526 | 1.4 ppb |
| Necedah Waterworks | 844 | 4.47 ppb |
| Wonewoc Waterworks | 758 | 1.6 ppb |
| Camp Douglas Waterworks | 640 | 1.95 ppb |
| Lyndon Station Waterworks | 474 | 1.89 ppb |
| Wi Air National Guard Volk Field | 400 | 6.29 ppb |
| Union Center Waterworks | 225 | 0 (not detected) |
| Kountry Aire Est Mhp Iii | 210 | 4.3 ppb |
| Hustler Waterworks | 170 | 1.21 ppb |
Next steps for Elroy, WI
Look up your address in Elroy 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 Elroy 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. Small systems behave differently: why small systems go over more often.