Hamilton Mobile Village, 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
Hamilton Mobile Village serves about 53 people through 21 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Ravalli County, Montana. EPA system ID: MT0001079; phone on file: 406-544-6815. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2018 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hamilton Mobile Village is 1 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2018 | 1 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. Hamilton Mobile Village's reported as 0 (not detected) sits at the 9th percentile in Montana and the 4th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
22 other systems share Ravalli County; 16 of them have a higher latest lead result than Hamilton Mobile Village. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hamilton City Of | 5,660 | 2 ppb |
| Stevensville Town Of | 2,090 | 0 (not detected) |
| Darby Town Of | 850 | 0 (not detected) |
| Pinesdale Town Of | 800 | 2 ppb |
| Trapper Creek Job Corps | 275 | 6 ppb |
| Kootenai Creek Village | 175 | 1 ppb |
| Stock Farm The | 150 | 2 ppb |
| Daly Estates Subdivision | 123 | 0 (not detected) |
| Wild Flower Hoa The | 120 | 1 ppb |
| Centennial Homeowner'S Association, Inc | 115 | 2 ppb |
Next steps for Missoula, MT
Look up your address in Hamilton Mobile Village'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 Hamilton Mobile Village 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. Small systems behave differently: why small systems go over more often.