What is the air quality trend in Santiago?

Over the past 8 days, Santiago had an average AQI of 74 based on station measurements. The worst day was with AQI .

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

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Trend

158h

PM2.5 Trend

158h · 138 stations

Daily Summary

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-04-17	48	44–51	11.6 µg/m³	23.8	6h	133
2026-04-16	63	31–84	18.6 µg/m³	25.3	24h	131
2026-04-15	89	56–122	29.7 µg/m³	36.7	24h	92
2026-04-14	72	42–93	22.1 µg/m³	33.4	24h	77
2026-04-13	70	52–88	21.3 µg/m³	29.9	16h	105
2026-04-12	74	58–88	23.1 µg/m³	29.5	24h	110
2026-04-11	84	61–108	27.9 µg/m³	40.4	24h	85
2026-04-10	97	82–137	33.6 µg/m³	51.6	16h	80

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