Happy Valley Mhp, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 5 ppb (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. 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.
Happy Valley Mhp at a glance
Happy Valley Mhp serves about 55 people through 22 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Missoula County, Montana. EPA system ID: MT0000377; phone on file: 406-317-3913. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 5 ppb from 0 ppb in the period ending 2018. The highest 90th-percentile result EPA holds for Happy Valley Mhp is 5 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 5 ppb |
| 2018 | 0 (not detected) |
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. Happy Valley Mhp's 5 ppb sits at the 92nd percentile in Montana and the 90th nationally (higher means more lead).
Neighbouring systems
80 other systems share Missoula County; 1 of them has a higher latest lead result than Happy Valley Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Missoula Water | 68,200 | 2 ppb |
| Lolo Water And Sewer Dist | 3,315 | 2 ppb |
| Seeley Lake Water District | 1,575 | 4 ppb |
| El Mar Estates Msla Co Water | 1,350 | 1 ppb |
| Westview Mobile Home Park | 947 | 1 ppb |
| Phantom Hills Water System | 810 | 3 ppb |
| Travois Village Mobile Park | 702 | 2 ppb |
| Wye Area Water System | 512 | 1 ppb |
| Grant Creek Water Users Association Inc | 380 | 0 (not detected) |
| Katoonah Lodges | 258 | 3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Missoula, 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 Happy Valley Mhp 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. The action level is dropping - the 10 ppb rule from 2027.