San Juan Municipio, PR

ZIP 00923

In ZIP 00923, 2 of the 12 things we check have at least one part graded D or F.

• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Super Asphalt Canovanas Plant (64%), mostly polycyclic aromatic compounds.
• Fine particles (PM2.5) average 8.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 00923

• Superfund sites nearbyA
• Factories and industrial sitesD
• Oil and gas wellsA
• Air qualityD
• Past wildfire impactsA
• Past flood impactsC

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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