Prairie Mobile Village, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (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. 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.
Prairie Mobile Village at a glance
Prairie Mobile Village serves about 163 people through 65 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lewis And Clark County, Montana. EPA system ID: MT0000600; phone on file: 406-227-6850. 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 3 ppb from 5 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Prairie Mobile Village is 5 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2019 | 5 ppb |
| 2016 | 1 ppb |
Where this result ranks
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. Prairie Mobile Village's 2 ppb sits at the 70th percentile in Montana and the 70th nationally (higher means more lead).
Nearby utilities
50 other systems share Lewis And Clark County; 11 of them have a higher latest lead result than Prairie Mobile Village. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Helena Water System | 32,091 | 3 ppb |
| East Helena City Of | 2,114 | 1 ppb |
| Eastgate Village Sewer And Water | 2,000 | 1 ppb |
| Va Medical Center Helena | 1,275 | 7 ppb |
| Helena Leisure Llc | 1,200 | 1 ppb |
| Ten Mile And Pleasant Valley Wua | 750 | 0 (not detected) |
| North Star Pud | 715 | 7 ppb |
| Treasure State Acres Wua | 483 | 2 ppb |
| La Casa Grande Water And Sewer District | 404 | 2 ppb |
| Skyview Water And Sewer Utility | 400 | 2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Helena, 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 Prairie 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. Size matters more than most people expect: small vs large water systems.