What is the air quality trend in Santiago?

Over the past 8 days, Santiago had an average AQI of 56 based on station measurements. The worst day was 2026-07-19 with AQI 81.

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.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 70 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-07-22	61	48–83	16.8 µg/m³	0.0	7h	76
2026-07-21	69	16–112	21.7 µg/m³	0.0	24h	80
2026-07-20	73	28–131	23.1 µg/m³	0.0	24h	79
2026-07-19	81	54–119	26.3 µg/m³	0.0	24h	77
2026-07-18	24	12–55	5.8 µg/m³	0.0	24h	67
2026-07-17	29	8–62	7.1 µg/m³	0.0	24h	70
2026-07-16	42	13–73	11.1 µg/m³	0.0	24h	78
2026-07-15	71	9–105	23.3 µg/m³	0.1	16h	79

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