Philippines City AQI Comparison
Rank cities side by side using OpenAQ PM2.5 and PM10 history normalized to US EPA AQI. This pilot covers 8 eligible cities with OpenAQ-derived daily AQI history.
Compare two cities
vs
Featured comparisons
Santo Tomas vs Barangka→
Highest vs cleanest city
AQI gap 167250 / 132 days
Santo Tomas vs Iloilo→
Highest-AQI pair
AQI gap 147250 / 208 days
Santo Tomas vs Magalang→
High vs mid-range city
AQI gap 153250 / 46 days
Iloilo vs Barangka→
Second-highest vs cleanest city
AQI gap 20208 / 132 days
San Fernando vs Ugong→
High vs low-AQI city
AQI gap 10108 / 141 days
Iloilo vs Ugong→
High vs low-AQI city
AQI gap 14208 / 141 days
Iloilo vs San Fernando→
Similar high-AQI cities
AQI gap 4208 / 108 days
San Fernando vs Mandaluyong City→
High vs low-AQI city
AQI gap 7108 / 146 days
San Fernando vs Paco→
Similar high-AQI cities
AQI gap 2108 / 251 days
Paco vs Magalang→
Similar high-AQI cities
AQI gap 0251 / 46 days
Magalang vs Mandaluyong City→
Similar high-AQI cities
AQI gap 546 / 146 days
Mandaluyong City vs Ugong→
Similar high-AQI cities
AQI gap 3146 / 141 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.