Posts Trailer Court, MT
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Posts Trailer Court
Posts Trailer Court serves about 45 people through 20 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lincoln County, Montana. EPA system ID: MT0000554; phone on file: 406-283-1593. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Posts Trailer Court's lead record
Against the period ending 2025 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Posts Trailer Court is 30 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 1 ppb |
| 2025 | 1 ppb |
| 2023 | 0 (not detected) |
| 2022 | 30 ppb over 15 |
| 2019 | 0 (not detected) |
| 2016 | 7 ppb |
How Posts Trailer Court 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. Posts Trailer Court's reported as 0 (not detected) sits at the 5th percentile in Montana and the 3rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Lincoln County
17 other systems share Lincoln County; 11 of them have a higher latest lead result than Posts Trailer Court. 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) |
| Wilderness Plateau Water And Sewer Dist | 208 | 2 ppb |
| 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) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Libby, 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 Posts Trailer Court 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. Why an old exceedance still matters: over the limit before, under it now.