Westana Mobile Manor Hamilton, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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.
About Westana Mobile Manor Hamilton
Westana Mobile Manor Hamilton serves about 90 people through 40 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: MT0000634; phone on file: 406-381-5254. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 10 ppb from 10 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Westana Mobile Manor Hamilton is 10 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2019 | 10 ppb |
| 2016 | 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. Westana Mobile Manor Hamilton's reported as 0 (not detected) sits at the 17th percentile in Montana and the 8th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
22 other systems share Ravalli County; 16 of them have a higher latest lead result than Westana Mobile Manor Hamilton. 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 Billings, MT
Look up your address in Westana Mobile Manor Hamilton'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 Westana Mobile Manor Hamilton 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. A zero today does not rule out a jump later - the rules are tightening in 2027.