Spanish Peaks Mountain Club, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 1.59 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.
Who runs the water here
Spanish Peaks Mountain Club serves about 40 people through 259 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Gallatin,Madison County, Montana. EPA system ID: MT0004588; phone on file: 406-539-7311. 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 (1.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Spanish Peaks Mountain Club is 2.3 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.59 ppb |
| 2023 | 1.7 ppb |
| 2020 | 1.32 ppb |
| 2018 | 2.3 ppb |
| 2017 | 1 ppb |
| 2017 | 0.67 ppb |
| 2016 | 2.3 ppb |
Against other Montana systems
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. Spanish Peaks Mountain Club's 1.59 ppb sits at the 62nd percentile in Montana and the 64th nationally (higher means more lead).
Next steps for Big Sky, MT
Test your own tap with a certified lab first-draw sample; Big Sky, 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 Spanish Peaks Mountain Club 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.