Wilderness Plateau Water And Sewer Dist, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2021-2023). 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
Wilderness Plateau Water And Sewer Dist serves about 208 people through 54 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Lincoln County, Montana. EPA system ID: MT0002985; phone on file: 406-291-2182. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 2 ppb from 0 ppb in the period ending 2017. The highest 90th-percentile result EPA holds for Wilderness Plateau Water And Sewer Dist is 2 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2 ppb |
| 2017 | 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. Wilderness Plateau Water And Sewer Dist's 2 ppb sits at the 70th percentile in Montana and the 70th nationally (higher means more lead).
Nearby utilities
17 other systems share Lincoln County; 3 of them have a higher latest lead result than Wilderness Plateau Water And Sewer Dist. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Libby City Of | 4,892 | 2 ppb |
| Troy City Of | 2,100 | 2 ppb |
| Eureka Town Of | 1,995 | 1 ppb |
| Indian Springs Ranch Sub | 455 | 0 (not detected) |
| Wilderness Club The | 440 | 0 (not detected) |
| Pinewood Village | 160 | 4 ppb |
| Rexford Town Of | 160 | 0 (not detected) |
| Emkayan Village Co Water And Sewer Dist | 160 | 2 ppb |
| Angel Island Subdivision | 150 | 0 (not detected) |
| Barnaby Lake Hoa | 75 | 1 ppb |
Next steps for Troy, MT
Test your own tap with a certified lab first-draw sample; Troy, 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 Wilderness Plateau Water And Sewer Dist 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. Systems that went over once often dip back under; here is what that means.