What is the air quality trend in Buin?

Over the past 8 days, Buin had an average AQI of 52 based on station measurements. The worst day was 2026-10-18 with AQI 78.

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.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 14 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-22	14	10–21	3.4 µg/m³	3h	13
2026-10-21	33	7–118	9.6 µg/m³	24h	16
2026-10-20	39	7–72	10.6 µg/m³	24h	19
2026-10-19	61	14–93	18.4 µg/m³	24h	20
2026-10-18	78	49–104	24.7 µg/m³	24h	21
2026-10-17	74	36–120	23.5 µg/m³	24h	19
2026-10-16	72	33–104	22.4 µg/m³	24h	21
2026-10-15	49	16–78	13.2 µg/m³	19h	19

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