What is the air quality trend in Nihommatsu?

Over the past 20 days, Nihommatsu had an average AQI of 33 based on station measurements. The worst day was 2026-05-16 with AQI 45.

How is Nihommatsu air quality measured?

Air quality in Nihommatsu 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 Nihommatsu, Japan

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

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

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

412h

PM2.5 Station

412h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	33	5–50	7.9 µg/m³	20h	1
2026-05-28	22	5–46	5.4 µg/m³	21h	1
2026-05-27	26	5–80	6.6 µg/m³	20h	1
2026-05-26	29	12–53	7.0 µg/m³	20h	2
2026-05-25	24	1–40	5.8 µg/m³	20h	2
2026-05-24	30	8–68	7.6 µg/m³	20h	1
2026-05-23	33	9–55	7.9 µg/m³	22h	2
2026-05-22	31	13–55	7.5 µg/m³	21h	1
2026-05-21	30	12–56	7.2 µg/m³	20h	1
2026-05-20	30	1–58	7.4 µg/m³	19h	1
2026-05-19	44	5–134	12.0 µg/m³	21h	1
2026-05-18	37	4–72	9.3 µg/m³	20h	1
2026-05-17	39	13–56	9.4 µg/m³	20h	1
2026-05-16	45	21–80	11.5 µg/m³	20h	1
2026-05-15	43	8–72	11.1 µg/m³	23h	2
2026-05-14	39	9–61	9.6 µg/m³	22h	2
2026-05-13	36	18–55	8.6 µg/m³	22h	2
2026-05-12	28	5–65	6.8 µg/m³	21h	1
2026-05-11	30	3–67	7.4 µg/m³	20h	1
2026-05-10	35	15–62	8.5 µg/m³	20h	1

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