Indian Springs Ranch Sub, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2024). 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.
Indian Springs Ranch Sub at a glance
Indian Springs Ranch Sub serves about 455 people through 210 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: MT0004611; phone on file: 406-889-5058. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Indian Springs Ranch Sub is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
Where this result ranks
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. Indian Springs Ranch Sub's reported as 0 (not detected) sits at the 34th percentile in Montana and the 22nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
17 other systems share Lincoln County; 11 of them have a higher latest lead result than Indian Springs Ranch Sub. 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 |
| 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) |
| Barnaby Lake Hoa | 75 | 1 ppb |
Your move
Look up your address in Indian Springs Ranch Sub'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 Indian Springs Ranch Sub 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. Small systems behave differently: why small systems go over more often.