What is the air quality trend in Yōkaichiba?

Over the past 21 days, Yōkaichiba had an average AQI of 38 based on station measurements. The worst day was 2026-05-16 with AQI 54.

How is Yōkaichiba air quality measured?

Air quality in Yōkaichiba 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 Yōkaichiba, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

479h

PM2.5 Station

479h · 11 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	38	24–45	9.1 µg/m³	15h	22
2026-05-28	35	21–59	8.4 µg/m³	24h	23
2026-05-27	29	18–43	6.9 µg/m³	24h	28
2026-05-26	31	18–44	7.5 µg/m³	24h	25
2026-05-25	33	25–43	7.9 µg/m³	24h	24
2026-05-24	34	23–49	8.0 µg/m³	24h	25
2026-05-23	32	21–54	7.8 µg/m³	24h	28
2026-05-22	31	20–49	7.5 µg/m³	24h	27
2026-05-21	33	23–42	8.0 µg/m³	24h	21
2026-05-20	36	24–51	8.7 µg/m³	24h	29
2026-05-19	42	28–57	10.1 µg/m³	24h	29
2026-05-18	53	45–62	13.2 µg/m³	24h	27
2026-05-17	49	39–61	12.1 µg/m³	24h	27
2026-05-16	54	45–60	13.7 µg/m³	24h	23
2026-05-15	53	30–62	13.2 µg/m³	24h	22
2026-05-14	49	40–59	12.0 µg/m³	24h	24
2026-05-13	41	30–58	9.9 µg/m³	24h	23
2026-05-12	34	25–44	8.0 µg/m³	24h	23
2026-05-11	41	30–64	10.2 µg/m³	24h	22
2026-05-10	39	32–54	9.5 µg/m³	24h	29
2026-05-09	31	25–34	7.4 µg/m³	8h	29

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