SmogRank / World / Ghana / Greater Accra / January 2023
Most people breathing unhealthy air in Greater Accra, Ghana, January 2023
1 city in Greater Accra, Ghana measured at 2 or more places, ranked by how many people breathed unhealthy air on an average day over the 31 days. The most people breathing unhealthy air: Accra, Ghana, about 1.34M on an average day. A city needs measurements on 70% of the days to be ranked.
OpenAQ's archive, where our readings come from, has almost none for 7 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; elsewhere a city's average is over its other days. Why.
About 1.34M people in this city breathed unhealthy air on an average day of January 2023.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
- 1Accralow-cost sensors 1.34M
Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.
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, January 2023 · All cities in Ghana, January 2023 · Greater Accra now
Use this board
SmogRank, most polluted cities in Greater Accra, Ghana, by people breathing unhealthy air, PM2.5, January 2023, smogrank.com/gh/region/greater-accra/history/2023-01?by=people (accessed 7 Oct 2026).
Download top 10 by average (PNG)
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.