Calama vs Osorno AQI Comparison

Side-by-side OpenAQ-derived air quality comparison for Calama and Osorno. Values use mapped daily PM2.5 and PM10 observations normalized to US EPA AQI.

Lower average AQI: Calama (39-pt gap)PM2.5: Calama 18.0 ug/m3 · Osorno 43.0 ug/m3

Source: OpenAQ local exports mapped to AQI Now cities; city summaries cover 2024-01-01–2025-01-01 and 2024-01-01–2025-01-01.

Compare two cities

City A

City B

Calama vs Osorno

Calama

Antofagasta, Chile

PM2.5: 18.0 ug/m3
PM10: 47.3 ug/m3
Worst month: December
Trend: n/a

EPA category: Moderate

Osorno

Los Lagos, Chile

106

PM2.5: 43.0 ug/m3
PM10: 52.1 ug/m3
Worst month: May
Trend: n/a

EPA category: Unhealthy for Sensitive Groups

Lower average AQI in this selected period: Calama. Values are historical OpenAQ-derived city summaries, not live readings.

Yearly EPA AQI trend

Seasonal EPA AQI heatmap

JanFebMarAprMayJunJulAugSepOctNovDec

Calama

Osorno

107

187

130

163

155

122

What this comparison measures

Average EPA AQI — city-level daily AQI values averaged across the OpenAQ coverage window.
PM2.5 and PM10 — mapped monitor concentrations aggregated to daily city averages.
Seasonality — worst and cleanest months from the monthly city rollups.
Trend — difference between the earliest and latest yearly AQI average in this build.