St Mary Headquarters And Cg, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 10 ppb (monitoring period 2022-2024). 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.
St Mary Headquarters And Cg at a glance
St Mary Headquarters And Cg serves about 1,030 people through 150 service connections, which makes it a small system under EPA's size classes. It is federally owned and draws groundwater, in Glacier County, Montana. EPA system ID: MT0002729; phone on file: 406-270-5146. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2019 (9 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for St Mary Headquarters And Cg is 10 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 10 ppb |
| 2019 | 9 ppb |
| 2018 | 2 ppb |
How St Mary Headquarters And Cg compares
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. St Mary Headquarters And Cg's 10 ppb sits at the 98th percentile in Montana and the 97th nationally (higher means more lead).
Nearby utilities
11 other systems share Glacier County; 0 of them have a higher latest lead result than St Mary Headquarters And Cg. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cut Bank City Of | 3,105 | 0 (not detected) |
| Cut Bank North Water District | 478 | 2 ppb |
| Glendale Colony | 150 | 3 ppb |
| Horizon Colony | 150 | 0 (not detected) |
| Seville Colony | 116 | 0 (not detected) |
| Big Sky Colony Cut Bank | 107 | 0 (not detected) |
| Piegan Border Station | 94 | 0 (not detected) |
| Glacier Colony | 80 | 0 (not detected) |
| Hidden Lake Colony | 80 | 0 (not detected) |
| Zenith Colony | 70 | 0 (not detected) |
Next steps for West Glacier, MT
Test your own tap with a certified lab first-draw sample; West Glacier, 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 St Mary Headquarters And Cg 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.