Miles City City Of, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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.
Who runs the water here
Miles City City Of serves about 9,565 people through 3,733 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Custer County, Montana. EPA system ID: MT0000291; phone on file: 406-234-1905. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Miles City City Of is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2022 | 2 ppb |
| 2019 | 1 ppb |
| 2016 | 2 ppb |
How Miles City City Of compares
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. Miles City City Of's 3 ppb sits at the 87th percentile in Montana and the 83rd nationally (higher means more lead).
Other water systems in Custer County
3 other systems share Custer County; 0 of them have a higher latest lead result than Miles City City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Custer Co Water And Sewer Dist | 480 | 0 (not detected) |
| Pine Hills Youth Correct Facil | 193 | 0 (not detected) |
| Palisades Apartments | 50 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Miles City, 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 Miles City City Of 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.