What is the air quality trend in Nishiwaki?

Over the past 15 days, Nishiwaki had an average AQI of 39 based on station measurements. The worst day was 2026-05-16 with AQI 56.

How is Nishiwaki air quality measured?

Air quality in Nishiwaki 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 Nishiwaki, Japan

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

333h

PM2.5 Station

333h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	38	28–53	9.0 µg/m³	16h	37
2026-05-28	35	23–55	8.4 µg/m³	24h	42
2026-05-27	28	22–41	6.8 µg/m³	24h	44
2026-05-26	30	21–41	7.3 µg/m³	24h	43
2026-05-25	35	27–45	8.4 µg/m³	24h	43
2026-05-24	36	28–53	8.6 µg/m³	24h	41
2026-05-23	35	26–43	8.5 µg/m³	24h	45
2026-05-22	30	23–39	7.3 µg/m³	24h	42
2026-05-21	39	24–127	10.3 µg/m³	24h	39
2026-05-20	36	25–49	8.6 µg/m³	24h	46
2026-05-19	41	32–59	10.0 µg/m³	24h	45
2026-05-18	52	40–58	13.1 µg/m³	24h	43
2026-05-17	49	42–58	12.0 µg/m³	23h	45
2026-05-16	56	52–70	14.4 µg/m³	21h	39
2026-05-15	55	34–92	14.6 µg/m³	9h	30

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