Rolling Hills, Town Of, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2025-2025). 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
Rolling Hills, Town Of serves about 450 people through 175 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Converse County, Wyoming. EPA system ID: WY5600782; phone on file: 307-277-6660. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2025 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rolling Hills, Town Of is 3 ppb across 12 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2025 | 1 ppb |
| 2024 | 2 ppb |
| 2024 | 2 ppb |
| 2023 | 2 ppb |
| 2023 | 2 ppb |
| 2022 | 2 ppb |
| 2022 | 2 ppb |
| 2021 | 3 ppb |
| 2021 | 1 ppb |
| 2020 | 2 ppb |
| 2017 | 0 (not detected) |
Against other Wyoming systems
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. Rolling Hills, Town Of's 1 ppb sits at the 47th percentile in Wyoming and the 53rd nationally (higher means more lead).
Nearby utilities
7 other systems share Converse County; 5 of them have a higher latest lead result than Rolling Hills, Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Douglas, City Of | 6,400 | 2 ppb |
| Glenrock, Town Of | 2,466 | 2 ppb |
| Lone Tree Village Mhp | 475 | 3 ppb |
| Ridgewater Improvement District | 218 | 1 ppb |
| Douglas Koa Cg & Pine Meadows Mhp | 165 | 0 (not detected) |
| Fairway Estates | 135 | 2 ppb |
| Sundance Meadows Spid | 50 | 3 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Rolling Hills, 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 Rolling Hills, Town Of 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. Systems that went over once often dip back under; here is what that means.