Seoul Health Impact
Seoul averaged 16.9 ug/m3 PM2.5, equal to 3.4x the WHO annual PM2.5 guideline and about 0.8 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 24 mapped monitoring locations in Seoul, South Korea.
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Average EPA AQI
63
Rank 20 of 100 cities by average AQI
PM2.5
16.9
ug/m3 annualized city average
Seasonality
March
Cleanest: September
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Seoul
-
-
83
75
62
68
52
63
43
55
64
70
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Seoul, the current global analytics build covers 297 daily rows from 2024-02-28 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.