What is the air quality trend in San Bernardo?

Over the past 8 days, San Bernardo had an average AQI of 56 based on station measurements. The worst day was 2026-09-05 with AQI 95.

How is San Bernardo air quality measured?

Air quality in San Bernardo 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 San Bernardo, Chile

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 73 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-09-05	95	59–122	32.7 µg/m³	0.0	11h	73
2026-09-04	53	21–88	15.0 µg/m³	0.0	24h	74
2026-09-03	48	22–68	12.7 µg/m³	0.0	24h	72
2026-09-02	67	13–93	21.6 µg/m³	0.1	24h	74
2026-09-01	63	45–83	18.1 µg/m³	0.0	23h	74
2026-08-31	23	13–67	5.7 µg/m³	0.0	24h	69
2026-08-30	63	19–131	19.7 µg/m³	0.0	24h	73
2026-08-29	41	16–75	11.2 µg/m³	0.0	12h	73

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