What is the air quality trend in San Bernardo?

Over the past 8 days, San Bernardo had an average AQI of 143 based on station measurements. The worst day was 2026-05-24 with AQI 177.

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.

153

Current AQI
Unhealthy Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 77 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	157	157–157	67.7 µg/m³	0.3	1h	77
2026-05-29	142	105–160	53.4 µg/m³	0.2	24h	75
2026-05-28	131	90–159	48.5 µg/m³	0.2	24h	75
2026-05-27	132	94–154	48.9 µg/m³	0.1	24h	76
2026-05-26	97	57–160	33.8 µg/m³	0.0	24h	75
2026-05-25	142	81–213	73.0 µg/m³	0.1	24h	75
2026-05-24	177	166–199	106.0 µg/m³	0.4	24h	76
2026-05-23	170	161–190	93.2 µg/m³	0.4	23h	77

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