Hildreth Subdivision No 3, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2027). 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.
Who runs the water here
Hildreth Subdivision No 3 serves about 128 people through 42 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Beaverhead County, Montana. EPA system ID: MT0003968. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hildreth Subdivision No 3 is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 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. Hildreth Subdivision No 3's reported as 0 (not detected) sits at the 23rd percentile in Montana and the 11th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
8 other systems share Beaverhead County; 6 of them have a higher latest lead result than Hildreth Subdivision No 3. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Dillon City Of | 4,300 | 3 ppb |
| Keller Subdivision No 2 Hoa | 300 | 2 ppb |
| Hildreth Subdivision No 2 | 300 | 3 ppb |
| Lima Town Of | 279 | 0 (not detected) |
| Western Mobile Village Dillon | 75 | 4 ppb |
| Skyline Tr Ct And Rv Park | 75 | 2 ppb |
| Clarks Lookout | 62 | 0 (not detected) |
| Beaverhead Jackson Water And Sewer Dist | 58 | 7 ppb |
Next steps for Dillon, MT
Look up your address in Hildreth Subdivision No 3'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 Hildreth Subdivision No 3 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. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.