Copperleaf Water System, WY
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Copperleaf Water System
Copperleaf Water System serves about 42 people through 21 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Park County, Wyoming. EPA system ID: WY5601728; phone on file: 307-272-5463. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2024 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Copperleaf Water System is 7 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 1 ppb |
| 2023 | 1 ppb |
| 2022 | 7 ppb |
| 2022 | 0 (not detected) |
How Copperleaf Water System 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. Copperleaf Water System's reported as 0 (not detected) sits at the 3rd percentile in Wyoming and the 2nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Park County
10 other systems share Park County; 6 of them have a higher latest lead result than Copperleaf Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cody, City Of | 10,224 | 0 (not detected) |
| Northwest Rural Water District | 7,330 | 0 (not detected) |
| Powell, City Of | 6,310 | 2 ppb |
| Ynp-Mammoth Hot Springs | 2,600 | 0 (not detected) |
| Green Acres Mobile Home Park | 375 | 1 ppb |
| Meeteetse, Town Of | 327 | 2 ppb |
| Jubys Mobile Home Park | 300 | 2 ppb |
| Rivers Bend Trailer Court | 96 | 0 (not detected) |
| Big Valley & Crossed Arrows Imp Dist | 35 | 1 ppb |
| Shoshone Municipal Pipeline | 25 | 1 ppb |
What to do in your house
Look up your address in Copperleaf Water System's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Copperleaf Water System 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. Small systems behave differently: why small systems go over more often.