SmogRank / World / United Kingdom / Northern Ireland / March 2023

Most polluted cities in Northern Ireland, United Kingdom, March 2023

No city in Northern Ireland, United Kingdom had measurements on 70% of the days, so March 2023 has no board for Northern Ireland, United Kingdom.

OpenAQ's archive, where our readings come from, has almost none for 20 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; many cities elsewhere are missing from this board, not clean. Why.

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, March 2023 · All cities in United Kingdom, March 2023 · Northern Ireland now