Cardiff Health Impact
Cardiff averaged 8.0 ug/m3 PM2.5, equal to 1.6x the WHO annual PM2.5 guideline and about 0.4 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Wales, United Kingdom.
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Average EPA AQI
36
Rank 84 of 171 cities by average AQI
PM2.5
8.0
ug/m3 annualized city average
Seasonality
February
Cleanest: December
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Cardiff
48
48
47
33
43
36
28
37
43
34
17
10
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Cardiff, the current global analytics build covers 342 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.