Shoshone Municipal Pipeline, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 1 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.
About Shoshone Municipal Pipeline
Shoshone Municipal Pipeline serves about 25 people through 15 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 surface water, in Park County, Wyoming. EPA system ID: WY5601198; phone on file: 307-548-6686. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Shoshone Municipal Pipeline's lead record
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Shoshone Municipal Pipeline is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2022 | 1 ppb |
| 2019 | 0 (not detected) |
| 2016 | 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. Shoshone Municipal Pipeline's 1 ppb sits at the 32nd percentile in Wyoming and the 50th nationally (higher means more lead).
Other water systems in Park County
10 other systems share Park County; 3 of them have a higher latest lead result than Shoshone Municipal Pipeline. 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) |
| Copperleaf Water System | 42 | 0 (not detected) |
| Big Valley & Crossed Arrows Imp Dist | 35 | 1 ppb |
Next steps for Cowley, WY
Test your own tap with a certified lab first-draw sample; Cowley, 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 Shoshone Municipal Pipeline 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.