Big Sandy Town Of, MT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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.
Big Sandy Town Of at a glance
Big Sandy Town Of serves about 608 people through 372 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Chouteau County, Montana. EPA system ID: MT0000150; phone on file: 406-378-2350. They can tell you what your service line is made of and whether they pay to replace it.
Big Sandy Town Of's lead record
Against the period ending 2019 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Big Sandy Town Of is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2019 | 1 ppb |
| 2016 | 2 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. Big Sandy Town Of's reported as 0 (not detected) sits at the 35th percentile in Montana and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Chouteau County
10 other systems share Chouteau County; 6 of them have a higher latest lead result than Big Sandy Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Fort Benton City Of | 1,500 | 2 ppb |
| Highwood County Water And Sewer District | 280 | 2 ppb |
| Geraldine Town Of | 260 | 3 ppb |
| Loma County Water District | 200 | 1 ppb |
| Carter Chouteau Co Water Dist | 150 | 0 (not detected) |
| South Chouteau County Water Dist | 80 | 2 ppb |
| Sunny Brook Colony | 80 | 0 (not detected) |
| Twin Hills Colony Inc | 78 | 0 (not detected) |
| North Geraldine Water System | 50 | 0 (not detected) |
| Hawarden Square Butte Water | 50 | 2 ppb |
Next steps for Big Sandy, MT
Look up your address in Big Sandy 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 Big Sandy 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. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.