Gros Ventre North Hoa, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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
Gros Ventre North Hoa serves about 160 people through 75 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Teton County, Wyoming. EPA system ID: WY5601357; phone on file: 307-690-5512. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Gros Ventre North Hoa's lead record
Against the period ending 2025 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Gros Ventre North Hoa is 3 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2025 | 3 ppb |
| 2024 | 1 ppb |
| 2023 | 3 ppb |
| 2022 | 1 ppb |
| 2022 | 2 ppb |
| 2020 | 3 ppb |
| 2017 | 1 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. Gros Ventre North Hoa's 3 ppb sits at the 79th percentile in Wyoming and the 81st nationally (higher means more lead).
Neighbouring systems
37 other systems share Teton County; 6 of them have a higher latest lead result than Gros Ventre North Hoa. 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 |
| Ynp - Lake Village | 5,925 | 4 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 |
Your move
Test your own tap with a certified lab first-draw sample; Wilson, 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 Gros Ventre North Hoa 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.