Cascade County, MT

ZIP 59405

In ZIP 59405, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cascade Town Of meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 259× California’s Public Health Goal.
• Closer to Superfund sites than 83% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Calumet Montana Refining LLC. (100%), mostly benzene.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 388,509 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 59405

• Superfund sites nearbyA to F
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyB to F
• Air qualityA to B
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to F

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…