Trail Ridge Water System, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2026-2026). 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
Trail Ridge Water System serves about 100 people through 45 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lincoln County, Wyoming. EPA system ID: WY5601576; phone on file: 307-226-4097. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 4 ppb from 6 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Trail Ridge Water System is 7 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 6 ppb |
| 2022 | 1 ppb |
| 2019 | 2 ppb |
| 2016 | 7 ppb |
Where this result ranks
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. Trail Ridge Water System's 2 ppb sits at the 59th percentile in Wyoming and the 70th nationally (higher means more lead).
Other water systems in Lincoln County
27 other systems share Lincoln County; 8 of them have a higher latest lead result than Trail Ridge Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Kemmerer-Diamondville Jpb | 3,348 | 2 ppb |
| Star Valley Ranch, Town Of | 2,894 | 8 ppb |
| Afton, Board Of Pub Utilities | 2,000 | 1 ppb |
| Leisure Valley Inc/ Star Valley Rv Park | 1,897 | 1 ppb |
| Alpine, Town Of | 1,300 | 1 ppb |
| Bedford Water & Sewer District | 750 | 1 ppb |
| Greater Smoot W&S District | 720 | 1 ppb |
| Cokeville, Town Of | 535 | 1.1 ppb |
| Nordic Ranches Water, Llc. | 465 | 3 ppb |
| Thayne, Town Of | 366 | 1 ppb |
Next steps for Thayne, WY
Test your own tap with a certified lab first-draw sample; Thayne, 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 Trail Ridge 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. The action level is dropping - the 10 ppb rule from 2027.