What is the air quality trend in Iruma?

Over the past 15 days, Iruma had an average AQI of 31 based on station measurements. The worst day was 2026-05-31 with AQI 50.

How is Iruma air quality measured?

Air quality in Iruma 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 Iruma, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

336h

PM2.5 Station

336h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-06-09	16	3–23	3.9 µg/m³	3.8	4h	55
2026-06-08	25	19–32	6.1 µg/m³	8.3	24h	74
2026-06-07	28	18–38	6.8 µg/m³	11.1	24h	76
2026-06-06	33	26–41	7.9 µg/m³	12.8	24h	74
2026-06-05	28	23–34	6.7 µg/m³	6.8	24h	80
2026-06-04	28	24–33	6.6 µg/m³	7.0	24h	72
2026-06-03	26	20–34	6.3 µg/m³	3.8	24h	69
2026-06-02	27	20–36	6.4 µg/m³	7.6	24h	74
2026-06-01	43	28–59	10.5 µg/m³	15.2	24h	72
2026-05-31	50	43–58	12.3 µg/m³	19.3	24h	74
2026-05-30	39	35–46	9.4 µg/m³	12.6	24h	74
2026-05-29	35	30–42	8.4 µg/m³	9.7	24h	70
2026-05-28	29	23–34	7.0 µg/m³	8.3	24h	70
2026-05-27	32	22–42	7.6 µg/m³	9.7	24h	74
2026-05-26	32	25–38	7.8 µg/m³	9.4	20h	74

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