Argyle Waterworks, WI
Exceeded the action level in the past
Latest 90th-percentile lead: 6.67 ppb (monitoring period 2026-2026). 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.
Argyle Waterworks at a glance
Argyle Waterworks serves about 823 people through 304 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 Lafayette County, Wisconsin. EPA system ID: WI1330068. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 19.33 ppb from 26 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Argyle Waterworks is 26 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 6.67 ppb |
| 2025 | 26 ppb over 15 |
| 2023 | 4.34 ppb |
| 2020 | 4.84 ppb |
| 2017 | 2.63 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. Argyle Waterworks's 6.67 ppb sits at the 93rd percentile in Wisconsin and the 94th nationally (higher means more lead).
Neighbouring systems
8 other systems share Lafayette County; 0 of them have a higher latest lead result than Argyle Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Darlington Waterworks | 2,235 | 0.99 ppb |
| Shullsburg Waterworks | 1,222 | 6.12 ppb |
| Belmont Waterworks | 989 | 3.95 ppb |
| Benton Waterworks | 976 | 0.98 ppb |
| Blanchardville Waterworks | 810 | 0 (not detected) |
| South Wayne Waterworks | 478 | 0 (not detected) |
| Gratiot Waterworks | 224 | 1.38 ppb |
| Wiota Sanitary District | 98 | 0.51 ppb |
Next steps for Argyle, WI
Test your own tap with a certified lab first-draw sample; Argyle, 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 Argyle 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.