Polk County, FL

ZIP 33837

In ZIP 33837, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Polk Correctional Institution has 1 contaminant at or over an EPA legal limit; 5 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 51× California’s Public Health Goal.
• Nearest Superfund site: Callaway & Son Drum Service, 6.8 miles away.
• Largest share of modeled toxic air from industry: Mosaic Fertilizer Llc-Bartow (88%), mostly sulfuric acid.
• Fine particles (PM2.5) average 7.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,677,183 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 33837

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityC
• Drinking water qualityB to D
• Pesticide useF
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsB to C
• Noise levelsA to B
• Radiation signalsA

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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