Colombia City AQI Comparison
Rank cities side by side using OpenAQ PM2.5 and PM10 history normalized to US EPA AQI. This pilot covers 13 eligible cities with OpenAQ-derived daily AQI history.
Compare two cities
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Featured comparisons
Girón vs Fontibón→
Highest vs cleanest city
AQI gap 6352 / 299 days
Girón vs Itagüí→
Highest-AQI pair
AQI gap 2752 / 248 days
Girón vs La Estrella→
High vs mid-range city
AQI gap 3552 / 248 days
Itagüí vs Fontibón→
Second-highest vs cleanest city
AQI gap 36248 / 299 days
Medellín vs Bogota→
High vs low-AQI city
AQI gap 20248 / 70 days
Itagüí vs Bogota→
High vs low-AQI city
AQI gap 22248 / 70 days
Itagüí vs Medellín→
Similar high-AQI cities
AQI gap 2248 / 248 days
Medellín vs Barbosa→
High vs low-AQI city
AQI gap 13248 / 241 days
Medellín vs Medellin→
Similar high-AQI cities
AQI gap 1248 / 248 days
Medellin vs Copacabana→
High vs low-AQI city
AQI gap 10248 / 243 days
Medellin vs Caldas→
Similar high-AQI cities
AQI gap 2248 / 243 days
Caldas vs Envigado→
High vs low-AQI city
AQI gap 6243 / 246 days
Methodology
The extractor maps OpenAQ monitoring locations to the nearest AQI Now city in the same country, aggregates PM2.5 and PM10 to daily city averages, and converts those concentrations to US EPA AQI. Country tool pages use only city summaries that satisfy the configured minimum daily coverage threshold.