Glendale Colony, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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.
About Glendale Colony
Glendale Colony serves about 150 people through 14 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Glacier County, Montana. EPA system ID: MT0001648; phone on file: 406-205-4477. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 2 ppb from 5 ppb in the period ending 2017. The highest 90th-percentile result EPA holds for Glendale Colony is 5 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2017 | 5 ppb |
| 2016 | 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. Glendale Colony's 3 ppb sits at the 83rd percentile in Montana and the 81st nationally (higher means more lead).
Other water systems in Glacier County
11 other systems share Glacier County; 1 of them has a higher latest lead result than Glendale Colony. 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) |
| St Mary Headquarters And Cg | 1,030 | 10 ppb |
| Cut Bank North Water District | 478 | 2 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) |
Your move
Test your own tap with a certified lab first-draw sample; Cut Bank, 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 Glendale Colony 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.