What is the air quality trend in Santiago?

Over the past 3 days, Santiago had an average AQI of 135 based on station measurements. The worst day was 2026-06-07 with AQI 150.

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.

112

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

48h

PM2.5 Station

48h · 85 stations

Temperature GFS model

8pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	119	109–142	42.8 µg/m³	0.2	11h	85
2026-06-08	137	101–162	51.5 µg/m³	0.2	24h	84
2026-06-07	150	127–170	62.5 µg/m³	0.2	13h	83

Back to Santiago Air Quality