Rose Park Mhp, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2025-2025). 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.
Who runs the water here
Rose Park Mhp serves about 220 people through 112 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Mesa County, Idaho. EPA system ID: CO0139685; phone on file: 208-994-9711. 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 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rose Park Mhp is 1 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2025 | 0 (not detected) |
How Rose Park Mhp compares
Of the 763 Idaho systems with a lead result, the median latest reading is 1 ppb; 3 are over 15 ppb right now and 46 have gone over at some point. Rose Park Mhp's 1 ppb sits at the 48th percentile in Idaho and the 52nd nationally (higher means more lead).
Nearby utilities
5 other systems share Mesa County; 0 of them have a higher latest lead result than Rose Park Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Paradise Park Mhp | 375 | 0 (not detected) |
| Picture Ranch Mhp | 220 | 0 (not detected) |
| Garfield Estates Mhp | 178 | 0 (not detected) |
| Vineyards Mhc | 150 | 0 (not detected) |
| Westlake Mhp | 116 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Boise, ID 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 Rose Park 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. What a 90th-percentile result does and does not tell you: how to read a lead result. The action level is dropping - the 10 ppb rule from 2027.