Vista West Improvement & Serv District, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2023-2025). 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
Vista West Improvement & Serv District serves about 120 people through 54 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Crook County, Wyoming. EPA system ID: WY5600246; phone on file: 307-299-3544. They can tell you what your service line is made of and whether they pay to replace it.
Vista West Improvement & Serv District's lead record
Against the period ending 2022 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Vista West Improvement & Serv District is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2022 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 0 (not detected) |
How Vista West Improvement & Serv District compares
Of the 311 Wyoming systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 16 have gone over at some point. Vista West Improvement & Serv District's 3 ppb sits at the 78th percentile in Wyoming and the 81st nationally (higher means more lead).
Neighbouring systems
5 other systems share Crook County; 1 of them has a higher latest lead result than Vista West Improvement & Serv District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sundance, City Of | 1,279 | 2 ppb |
| Moorcroft, Town Of | 1,009 | 0 (not detected) |
| Pine Haven, Town Of | 498 | 2 ppb |
| Hulett, Town Of | 420 | 1 ppb |
| Buckmiller Enterprises, Llc | 33 | 4 ppb |
Next steps for Gillette, WY
Test your own tap with a certified lab first-draw sample; Gillette, WY 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 Vista West Improvement & Serv District 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.