Vratsa AQI Trends
Vratsa AQI was measured in 2024, with a trend delta of n/a AQI points. The page uses OpenAQ-derived daily history for 4 mapped monitoring locations in Vratsa, Bulgaria.
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Average EPA AQI
36
Rank 22 of 35 cities by average AQI
PM2.5
10.6
ug/m3 annualized city average
Seasonality
November
Cleanest: April
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Vratsa
22
22
27
17
37
35
38
38
40
42
58
50
What this trends page measures
Compare yearly air-quality direction, best years, worst years, and trend deltas.
For Vratsa, the current global analytics build covers 351 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.