Stillwater County, MT

ZIP 59063

In ZIP 59063, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Skycrest Estates Subdivision meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 31× California’s Public Health Goal.
• Closer to Superfund sites than 57% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Chs Inc. Laurel Refinery (47%), mostly 1,3-butadiene.
• Fine particles (PM2.5) average 5.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 144,896 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 59063

• Superfund sites nearbyC
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsD

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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