Union Grove Waterworks, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 1.28 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. 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.
Union Grove Waterworks at a glance
Union Grove Waterworks serves about 4,900 people through 1,814 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 Racine County, Wisconsin. EPA system ID: WI2520200. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2020 (1.25 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Union Grove Waterworks is 1.83 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.28 ppb |
| 2020 | 1.25 ppb |
| 2017 | 1.83 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. Union Grove Waterworks's 1.28 ppb sits at the 48th percentile in Wisconsin and the 60th nationally (higher means more lead).
Nearby utilities
11 other systems share Racine County; 8 of them have a higher latest lead result than Union Grove Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Racine Waterworks | 105,100 | 3.3 ppb |
| Caledonia Water Utility - Village Of | 21,819 | 3.3 ppb |
| Burlington Waterworks | 11,043 | 15 ppb |
| Waterford Waterworks | 5,368 | 3.37 ppb |
| Wind Point Water Dept | 1,804 | 4 ppb |
| Southern Wisconsin Center | 950 | 2.01 ppb |
| Hickory Haven Mhc | 303 | 6.8 ppb |
| Eagle Lake Manor | 250 | 2.19 ppb |
| Browns Lake Mobile Home Ct | 225 | 0.64 ppb |
| River Springs Apartments Llc | 38 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Union Grove, 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 Union Grove 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. Size matters more than most people expect: small vs large water systems.