What is the air quality trend in Hirokawa?

Over the past 21 days, Hirokawa had an average AQI of 42 based on station measurements. The worst day was 2026-07-21 with AQI 56.

How is Hirokawa air quality measured?

Air quality in Hirokawa 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 Hirokawa, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

475h

PM2.5 Station

475h · 23 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	29	25–31	6.9 µg/m³	3h	22
2026-08-07	34	23–58	8.2 µg/m³	22h	19
2026-08-06	50	24–82	13.1 µg/m³	24h	10
2026-08-05	42	22–59	10.4 µg/m³	24h	8
2026-08-04	39	23–51	9.4 µg/m³	24h	15
2026-08-03	41	28–56	10.0 µg/m³	24h	15
2026-08-02	44	30–57	10.6 µg/m³	24h	17
2026-08-01	51	42–57	12.6 µg/m³	24h	18
2026-07-31	47	30–57	11.5 µg/m³	24h	18
2026-07-30	47	33–61	11.5 µg/m³	24h	16
2026-07-29	37	28–56	8.8 µg/m³	24h	16
2026-07-28	35	22–45	8.3 µg/m³	24h	16
2026-07-27	33	25–49	7.9 µg/m³	24h	19
2026-07-26	35	23–55	8.4 µg/m³	24h	18
2026-07-25	40	30–56	9.7 µg/m³	24h	18
2026-07-24	41	32–54	9.8 µg/m³	24h	17
2026-07-23	46	27–62	11.5 µg/m³	24h	19
2026-07-22	53	38–66	13.6 µg/m³	24h	19
2026-07-21	56	20–75	15.2 µg/m³	23h	12
2026-07-20	54	44–75	14.0 µg/m³	24h	15
2026-07-19	44	28–57	10.6 µg/m³	19h	16

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