What is the air quality trend in Chiba?

Over the past 8 days, Chiba had an average AQI of 33 based on station measurements. The worst day was 2026-05-22 with AQI 36.

How is Chiba air quality measured?

Air quality in Chiba 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 Chiba, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

169h

PM2.5 Station

169h · 3 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	36	31–42	8.7 µg/m³	9.3	15h	63
2026-05-28	32	23–47	7.8 µg/m³	8.2	24h	68
2026-05-27	29	20–39	6.8 µg/m³	9.7	24h	79
2026-05-26	30	22–39	7.2 µg/m³	7.8	24h	73
2026-05-25	32	25–40	7.8 µg/m³	9.0	24h	71
2026-05-24	34	26–48	8.0 µg/m³	11.9	24h	73
2026-05-23	35	29–59	8.4 µg/m³	14.4	24h	80
2026-05-22	36	25–91	9.5 µg/m³	8.2	10h	69

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