Prairie Village Water Trust, WI
Lead detected, under the action levels
Latest 90th-percentile lead: 2.6 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.
Who runs the water here
Prairie Village Water Trust serves about 2,100 people through 300 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Waukesha County, Wisconsin. EPA system ID: WI2680277. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2020 (2.22 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Prairie Village Water Trust is 2.97 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2.6 ppb |
| 2020 | 2.22 ppb |
| 2018 | 2.97 ppb |
How Prairie Village Water Trust 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. Prairie Village Water Trust's 2.6 ppb sits at the 71st percentile in Wisconsin and the 78th nationally (higher means more lead).
Other water systems in Waukesha County
71 other systems share Waukesha County; 16 of them have a higher latest lead result than Prairie Village Water Trust. 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 |
Your move
Test your own tap with a certified lab first-draw sample; North Prairie, 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 Prairie Village Water Trust 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.