Czech Republic City AQI Comparison
Rank cities side by side using OpenAQ PM2.5 and PM10 history normalized to US EPA AQI. This pilot covers 61 eligible cities with OpenAQ-derived daily AQI history.
Compare two cities
vs
Featured comparisons
Turnov vs Sokolov→
Highest vs cleanest city
AQI gap 6867 / 339 days
Turnov vs Hostivice→
Highest-AQI pair
AQI gap 1967 / 55 days
Turnov vs Brno→
High vs mid-range city
AQI gap 4967 / 299 days
Hostivice vs Sokolov→
Second-highest vs cleanest city
AQI gap 4955 / 339 days
Kralupy nad Vltavou vs Pelhřimov→
High vs low-AQI city
AQI gap 34362 / 282 days
Hostivice vs Pelhřimov→
High vs low-AQI city
AQI gap 4155 / 282 days
Hostivice vs Kralupy nad Vltavou→
Similar high-AQI cities
AQI gap 755 / 362 days
Kralupy nad Vltavou vs Roztoky→
High vs low-AQI city
AQI gap 33362 / 347 days
Kralupy nad Vltavou vs Bystrc→
Similar high-AQI cities
AQI gap 4362 / 147 days
Bystrc vs Liberec→
High vs low-AQI city
AQI gap 27147 / 305 days
Bystrc vs Říčany→
Similar high-AQI cities
AQI gap 0147 / 180 days
Říčany vs Kroměříž→
High vs low-AQI city
AQI gap 26180 / 284 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.