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Calama Seasonal Pollution

Calama usually records its highest OpenAQ-derived EPA AQI in December and its cleanest month in May. The page uses OpenAQ-derived daily history for 6 mapped monitoring locations in Antofagasta, Chile.

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Average EPA AQI

67

Rank 54 of 60 cities by average AQI

PM2.5

18.0

ug/m3 annualized city average

Seasonality

December

Cleanest: May

Health indicator

0.8

cigarette-equivalent per day

Yearly EPA AQI trend

0501002024Calama

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec
Calama
69
69
68
67
64
67
68
67
67
66
68
70

What this seasonality page measures

Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.

For Calama, the current global analytics build covers 367 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.

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