Ynp - Lake Village, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 4 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.
Ynp - Lake Village at a glance
Ynp - Lake Village serves about 5,925 people through 683 service connections, which makes it a medium-sized system under EPA's size classes. It is federally owned and draws surface water, in Teton County, Wyoming. EPA system ID: WY5680079; phone on file: 307-344-9051. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 7 ppb from 11 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Ynp - Lake Village is 15 ppb across 7 monitoring periods, none of them over 15 ppb (3 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4 ppb |
| 2025 | 11 ppb over 10 |
| 2024 | 7 ppb |
| 2024 | 5 ppb |
| 2024 | 5 ppb |
| 2023 | 15 ppb over 10 |
| 2023 | 15 ppb over 10 |
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. Ynp - Lake Village's 4 ppb sits at the 91st percentile in Wyoming and the 88th nationally (higher means more lead).
Nearby utilities
37 other systems share Teton County; 3 of them have a higher latest lead result than Ynp - Lake Village. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Jackson, Town Of | 24,760 | 1 ppb |
| Ynp-Old Faithful | 7,745 | 2 ppb |
| Gtnp-Colter Bay Village | 4,514 | 1 ppb |
| Gtnp-Jackson Lake Lodge | 1,830 | 2 ppb |
| Rafter J Subdivision Hoa | 1,500 | 3 ppb |
| Aspens Pines W&S District | 1,400 | 2 ppb |
| Teton Village Water & Sewer District | 906 | 2 ppb |
| Melody Ranch Improvement & Service Dist. | 900 | 5 ppb |
| Spring Creek Improvement District | 400 | 3 ppb |
| Snake River Sporting Club | 332 | 5 ppb |
Next steps for Yellowstone, WY
Test your own tap with a certified lab first-draw sample; Yellowstone, 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 Ynp - Lake Village 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.