What is the air quality trend in San Bernardo?

Over the past 8 days, San Bernardo had an average AQI of 48 based on station measurements. The worst day was 2026-10-18 with AQI 74.

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
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 59 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-22	13	11–17	3.1 µg/m³	0.0	4h	60
2026-10-21	24	8–61	5.8 µg/m³	0.0	24h	67
2026-10-20	32	9–55	7.7 µg/m³	0.0	24h	76
2026-10-19	59	14–93	17.5 µg/m³	0.0	24h	77
2026-10-18	74	52–108	22.8 µg/m³	0.0	24h	77
2026-10-17	70	35–109	21.6 µg/m³	0.1	24h	73
2026-10-16	69	28–130	21.5 µg/m³	0.1	24h	81
2026-10-15	48	16–69	12.9 µg/m³	0.0	18h	74

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