Hangmans Tree Wua, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 4 ppb (monitoring period 2024-2026). 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.
Hangmans Tree Wua at a glance
Hangmans Tree Wua serves about 158 people through 64 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Jefferson County, Montana. EPA system ID: MT0000128; phone on file: 406-933-8535. 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 2023 (5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hangmans Tree Wua is 8 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 4 ppb |
| 2023 | 5 ppb |
| 2023 | 5 ppb |
| 2020 | 4 ppb |
| 2020 | 4 ppb |
| 2019 | 8 ppb |
| 2017 | 2 ppb |
| 2017 | 2 ppb |
Where this result ranks
Of the 753 Montana systems with a lead result, the median latest reading is 1 ppb; 5 are over 15 ppb right now and 28 have gone over at some point. Hangmans Tree Wua's 4 ppb sits at the 90th percentile in Montana and the 87th nationally (higher means more lead).
Other water systems in Jefferson County
13 other systems share Jefferson County; 3 of them have a higher latest lead result than Hangmans Tree Wua. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Whitehall Town Of | 1,500 | 3 ppb |
| Boulder City Of | 1,400 | 0 (not detected) |
| Jefferson Hills Wua | 780 | 1 ppb |
| Saddle Mountain Corp Clancy | 350 | 6 ppb |
| Forest Park Water Users Association | 323 | 15 ppb |
| Blue Sky Heights Wua Clancy | 250 | 0 (not detected) |
| Basin County Water And Sewer Dist | 200 | 0 (not detected) |
| Stoney Brook Village Condominium Assoc | 142 | 4 ppb |
| Elkhorn Health And Rehabilitation Llc | 89 | 2 ppb |
| Jefferson Tracts Assoc Inc | 80 | 7 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Clancy, MT 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 Hangmans Tree Wua 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.