Colombo Health Impact
Colombo averaged 17.4 ug/m3 PM2.5, equal to 3.5x 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 1 mapped monitoring location in Western Province, Sri Lanka.
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Average EPA AQI
64
Rank 2 of 3 cities by average AQI
PM2.5
17.4
ug/m3 annualized city average
Seasonality
March
Cleanest: August
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Colombo
91
97
99
63
54
50
42
40
44
42
63
88
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 312 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.