Yerevan Seasonal Pollution
Yerevan usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in September. The page uses OpenAQ-derived daily history for 67 mapped monitoring locations in Yerevan, Armenia.
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Average EPA AQI
83
Rank 2 of 3 cities by average AQI
PM2.5
27.0
ug/m3 annualized city average
Seasonality
December
Cleanest: September
Health indicator
1.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Yerevan
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-
-
-
-
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56
56
64
99
143
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Yerevan, the current global analytics build covers 155 daily rows from 2024-07-30 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.