Colombo Health Impact
Colombo averaged 13.6 ug/m3 PM2.5, equal to 2.7x the WHO annual PM2.5 guideline and about 0.6 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Western, Sri Lanka.
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Average EPA AQI
55
Rank 3 of 3 cities by average AQI
PM2.5
13.6
ug/m3 annualized city average
Seasonality
March
Cleanest: August
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Colombo
-
-
85
68
55
48
41
39
47
40
71
82
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Colombo, the current global analytics build covers 81 daily rows from 2024-03-19 to 2024-12-28. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.