What is the air quality trend in Buin?

Over the past 8 days, Buin had an average AQI of 57 based on station measurements. The worst day was 2026-09-05 with AQI 100.

How is Buin air quality measured?

Air quality in Buin 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 Buin, Chile

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

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

105

Current AQI
Unhealthy for sensitive groups Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 18 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	100	70–122	34.6 µg/m³	10h	18
2026-09-04	58	20–99	16.8 µg/m³	24h	18
2026-09-03	48	23–82	12.9 µg/m³	24h	18
2026-09-02	64	11–87	20.0 µg/m³	24h	18
2026-09-01	62	36–77	17.8 µg/m³	23h	18
2026-08-31	25	8–62	6.1 µg/m³	24h	17
2026-08-30	65	19–135	20.7 µg/m³	24h	18
2026-08-29	39	13–72	10.5 µg/m³	12h	18

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