Carpenter Lake Hoa, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Carpenter Lake Hoa at a glance
Carpenter Lake Hoa serves about 65 people through 36 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: MT0003694; phone on file: 406-862-4645. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Carpenter Lake Hoa's lead record
Against the period ending 2017 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Carpenter Lake Hoa is 1 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2017 | 1 ppb |
How Carpenter Lake Hoa 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. Carpenter Lake Hoa's reported as 0 (not detected) sits at the 11th percentile in Montana and the 6th 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 Carpenter Lake Hoa. 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) |
Your move
Look up your address in Carpenter Lake Hoa's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Carpenter Lake Hoa 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. A zero today does not rule out a jump later - the rules are tightening in 2027.