Mexico City Health Impact
Mexico City averaged 27.4 ug/m3 PM2.5, equal to 5.5x the WHO annual PM2.5 guideline and about 1.2 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Ciudad de México, Mexico.
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Average EPA AQI
Rank 14 of 86 cities by average AQI
PM2.5
27.4
ug/m3 annualized city average
Seasonality
May
Cleanest: October
Health indicator
1.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Mexico City, the current global analytics build covers 261 daily rows from 2024-01-01 to 2025-01-01. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.