Poland City AQI Comparison
Rank cities side by side using OpenAQ PM2.5 and PM10 history normalized to US EPA AQI. This pilot covers 155 eligible cities with OpenAQ-derived daily AQI history.
Compare two cities
vs
Featured comparisons
Karczew vs Nysa→
Highest vs cleanest city
AQI gap 10737 / 363 days
Karczew vs Wejherowo→
Highest-AQI pair
AQI gap 4937 / 23 days
Karczew vs Wrocław→
High vs mid-range city
AQI gap 7337 / 364 days
Wejherowo vs Nysa→
Second-highest vs cleanest city
AQI gap 5823 / 363 days
Katowice vs Skawina→
High vs low-AQI city
AQI gap 47363 / 360 days
Wejherowo vs Skawina→
High vs low-AQI city
AQI gap 5323 / 360 days
Wejherowo vs Katowice→
Similar high-AQI cities
AQI gap 623 / 363 days
Katowice vs Sokółka→
High vs low-AQI city
AQI gap 44363 / 362 days
Katowice vs Warsaw→
Similar high-AQI cities
AQI gap 1363 / 210 days
Warsaw vs Jędrzejów→
High vs low-AQI city
AQI gap 40210 / 338 days
Warsaw vs Racibórz→
Similar high-AQI cities
AQI gap 5210 / 361 days
Racibórz vs Grójec→
High vs low-AQI city
AQI gap 31361 / 361 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.