Zenith Colony, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Zenith Colony serves about 70 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: MT0004768; phone on file: 406-336-5000. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Zenith Colony is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 3 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. Zenith Colony's reported as 0 (not detected) sits at the 12th percentile in Montana and the 6th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Glacier County
11 other systems share Glacier County; 4 of them have a higher latest lead result than Zenith 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 |
| 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) |
What to do in your house
Look up your address in Zenith Colony's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Zenith 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. A zero today does not rule out a jump later - the rules are tightening in 2027.