Grass Range Town Of, 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.
About Grass Range Town Of
Grass Range Town Of serves about 102 people through 89 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 Fergus County, Montana. EPA system ID: MT0000231; phone on file: 406-428-2174. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2017 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Grass Range Town Of is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2017 | 1 ppb |
| 2016 | 1 ppb |
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. Grass Range Town Of's reported as 0 (not detected) sits at the 20th percentile in Montana and the 10th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
10 other systems share Fergus County; 1 of them has a higher latest lead result than Grass Range Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lewistown City Of | 5,923 | 0 (not detected) |
| Mountain Acres Mb Hm Pk | 320 | 0 (not detected) |
| Winifred Town Of | 274 | 0 (not detected) |
| Denton Town Of | 255 | 4 ppb |
| Moore Town Of | 186 | 0 (not detected) |
| Roy Water And Sewer District | 110 | 0 (not detected) |
| Ayers Hutterite Colony | 58 | 0 (not detected) |
| King Ranch Colony | 56 | 0 (not detected) |
| Deerfield Hutterite Colony | 51 | 0 (not detected) |
| Spring Creek Colony Lewistown | 48 | 0 (not detected) |
What to do in your house
Look up your address in Grass Range Town Of'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 Grass Range Town Of 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.