What is the air quality trend in Aira?

Over the past 8 days, Aira had an average AQI of 43 based on station measurements. The worst day was 2026-10-16 with AQI 57.

How is Aira air quality measured?

Air quality in Aira 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 Aira, Japan

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

Historical PM2.5 and AQI trend from monitoring stations near Aira, Japan.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

166h

PM2.5 Station

166h · 12 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	31	19–44	7.5 µg/m³	10h	10
2026-10-20	43	25–70	10.9 µg/m³	24h	8
2026-10-19	57	28–163	17.3 µg/m³	24h	8
2026-10-18	35	20–53	8.4 µg/m³	24h	9
2026-10-17	49	26–107	13.4 µg/m³	24h	8
2026-10-16	57	9–138	16.6 µg/m³	24h	7
2026-10-15	48	19–136	13.1 µg/m³	24h	8
2026-10-14	31	16–53	7.4 µg/m³	12h	8

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