La Crosse Waterworks, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 1.34 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. 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.
La Crosse Waterworks at a glance
La Crosse Waterworks serves about 53,000 people through 16,176 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in La Crosse County, Wisconsin. EPA system ID: WI6320309. Ask the utility on your bill for your address in their service line inventory.
La Crosse Waterworks's lead record
That is down 9.56 ppb from 10.9 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for La Crosse Waterworks is 10.9 ppb across 6 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.34 ppb |
| 2025 | 10.9 ppb over 10 |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2020 | 1.79 ppb |
| 2017 | 2.27 ppb |
How La Crosse Waterworks compares
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. La Crosse Waterworks's 1.34 ppb sits at the 51st percentile in Wisconsin and the 61st nationally (higher means more lead).
Other water systems in La Crosse County
18 other systems share La Crosse County; 7 of them have a higher latest lead result than La Crosse Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Onalaska Waterworks | 18,000 | 0 (not detected) |
| Holmen Waterworks | 10,147 | 2.78 ppb |
| West Salem Waterworks | 5,045 | 1.34 ppb |
| Bangor Waterworks | 1,520 | 1.27 ppb |
| Shelby Tn Of Wedgewood Vly | 1,020 | 1.1 ppb |
| Rockland Waterworks | 642 | 1.54 ppb |
| St Joseph San Dist 1 | 503 | 3.43 ppb |
| La Crosse Estates Llc | 351 | 1.94 ppb |
| Town Of Farmington Sanitary District | 275 | 0 (not detected) |
| Bostwick Valley Mhp | 240 | 3.14 ppb |
Your move
Test your own tap with a certified lab first-draw sample; La Crosse, 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 La Crosse 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.