Stoney Brook Village Condominium Assoc, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 4 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.
Stoney Brook Village Condominium Assoc at a glance
Stoney Brook Village Condominium Assoc serves about 142 people through 63 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: MT0004257; phone on file: 406-439-0907. 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 up 3 ppb from 1 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Stoney Brook Village Condominium Assoc is 5 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4 ppb |
| 2022 | 1 ppb |
| 2019 | 5 ppb |
| 2016 | 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. Stoney Brook Village Condominium Assoc'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 Stoney Brook Village Condominium Assoc. 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) |
| Hangmans Tree Wua | 158 | 4 ppb |
| Elkhorn Health And Rehabilitation Llc | 89 | 2 ppb |
| Jefferson Tracts Assoc Inc | 80 | 7 ppb |
Next steps for Clancy, MT
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 Stoney Brook Village Condominium Assoc 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.