Sofia AQI Trends
Sofia AQI was measured in 2024, with a trend delta of n/a AQI points. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Sofia-Grad, Bulgaria.
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Average EPA AQI
31
Rank 23 of 35 cities by average AQI
PM2.5
48.1
ug/m3 annualized city average
Seasonality
December
Cleanest: May
Health indicator
2.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Sofia
30
27
28
21
17
27
21
20
21
28
29
101
What this trends page measures
Compare yearly air-quality direction, best years, worst years, and trend deltas.
For Sofia, the current global analytics build covers 341 daily rows from 2024-01-01 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.