Cobblestone Court, MT
No lead results on file with EPA
Latest 90th-percentile lead: no result on file. The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. EPA's database has no Lead and Copper Rule results for this system. Without them there is nothing to go on, so a tap test is the only way to know.
Who runs the water here
Cobblestone Court serves about 50 people through 19 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Cascade County, Montana. EPA system ID: MT0004831; phone on file: 406-452-1623. They can tell you what your service line is made of and whether they pay to replace it.
Other water systems in Cascade County
41 other systems share Cascade County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Great Falls City Of | 60,000 | 12 ppb |
| Malmstrom Air Force Base | 8,850 | 0 (not detected) |
| Sun Prairie Village County | 1,800 | 1 ppb |
| Black Eagle Cascade County Water Sewer | 1,233 | 0 (not detected) |
| Prairie Water Company | 1,000 | 0 (not detected) |
| Cascade Town Of | 650 | 2 ppb |
| Belt Town Of | 600 | 0 (not detected) |
| Vaughn Cascade County Water And Sewer | 585 | 0 (not detected) |
| Two Buttes Water Users Assn | 525 | 2 ppb |
| Gore Hill County Water Dist | 500 | 1 ppb |
Next steps for Great Falls, MT
Test your own tap with a certified lab first-draw sample; Great Falls, MT may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Cobblestone Court 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. The action level is dropping - the 10 ppb rule from 2027.