What is the air quality trend in Santiago?

Over the past 8 days, Santiago had an average AQI of 139 based on station measurements. The worst day was 2026-06-02 with AQI 159.

How is Santiago air quality measured?

Air quality in Santiago is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Santiago, Chile

Name: Santiago Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Santiago, Chile.

117

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 85 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	118	109–142	42.6 µg/m³	0.2	12h	85
2026-06-08	137	101–162	51.5 µg/m³	0.2	24h	84
2026-06-07	156	127–170	69.5 µg/m³	0.3	24h	83
2026-06-06	159	148–168	70.4 µg/m³	0.3	24h	84
2026-06-05	139	99–161	54.4 µg/m³	0.2	24h	84
2026-06-04	118	83–154	42.5 µg/m³	0.1	24h	83
2026-06-03	131	104–152	47.7 µg/m³	0.2	24h	83
2026-06-02	159	134–170	75.7 µg/m³	0.2	11h	83

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