What is the air quality trend in Chitose?

Over the past 15 days, Chitose had an average AQI of 45 based on station measurements. The worst day was 2026-08-28 with AQI 63.

How is Chitose air quality measured?

Air quality in Chitose 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 Chitose, Japan

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

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

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

330h

PM2.5 Station

330h · 6 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-09-05	31	14–48	7.5 µg/m³	12h	5
2026-09-04	43	12–149	11.9 µg/m³	24h	6
2026-09-03	36	11–103	9.8 µg/m³	24h	6
2026-09-02	49	13–169	15.8 µg/m³	24h	5
2026-09-01	49	25–152	14.2 µg/m³	24h	6
2026-08-31	53	18–157	15.7 µg/m³	24h	7
2026-08-30	54	16–165	16.9 µg/m³	24h	6
2026-08-29	46	9–125	12.9 µg/m³	23h	5
2026-08-28	63	25–133	18.7 µg/m³	23h	6
2026-08-27	39	18–84	10.2 µg/m³	23h	6
2026-08-26	40	16–68	10.1 µg/m³	24h	5
2026-08-25	45	6–158	13.0 µg/m³	24h	5
2026-08-24	49	20–81	12.9 µg/m³	24h	5
2026-08-23	46	33–63	11.4 µg/m³	24h	6
2026-08-22	34	21–45	8.1 µg/m³	9h	4

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