Kumamoto: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

Latest air quality data: Kumamoto

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Pollution and air quality forecast for Kumamoto. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Kumamoto:

particulate matter (PM2.5) dust - 3 (Good)
particulate matter (PM10) suspended dust - 3 (Good)
ozone (O3) - 68 (Good)
nitrogen dioxide (NO2) - 3 (Good)
sulfur dioxide (SO2) - 3 (Good)
carbon monoxide (CO) - 128 (Good)

Real-time Air Quality Index (AQI) for Kumamoto, Thursday, August 27, 2026: 1.

AQI 1 Good

What is the air quality in Kumamoto today? Is the air polluted in Kumamoto?. Is there smog?

Today (Thursday, August 27, 2026) air quality is good. The air quality has no effect on health. Everyone can continue their outdoor activities normally in Kumamoto.

What is the current level of PM2.5 in Kumamoto? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 3 (Good) For comparison, the highest level of PM2.5 in Kumamoto in the last 7 days was: 10 (Sunday, August 23, 2026) and the lowest: 3 (Wednesday, August 26, 2026).

What is the level of PM10 today in Kumamoto? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Kumamoto is: 3 (Good)

How is the O3 level today in Kumamoto? (ozone (O3))
68 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
3 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
3 (Good)

How high is the CO level? (carbon monoxide (CO))
128 (Good)

Current data Thursday, August 27, 2026 at 10:00 AM

PM2,5 3 (Good)

PM10 3 (Good)

O3 68 (Good)

NO2 3 (Good)

SO2 3 (Good)

CO 128 (Good)

Data on air pollution from recent days in Kumamoto

index	2026-08-27	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20
pm25	6 Good	3 Good	6 Good	8 Good	10 Good	10 Good	8 Good	6 Good
pm10	7 Good	4 Good	7 Good	9 Good	12 Good	12 Good	9 Good	7 Good
o3	37 Good	30 Good	44 Good	64 Good	77 Moderate	67 Good	46 Good	55 Good
no2	11 Good	5 Good	6 Good	6 Good	8 Good	9 Good	11 Good	7 Good
so2	4 Good	3 Good	6 Good	7 Good	5 Good	4 Good	5 Good	5 Good
co	137 Good	130 Good	112 Good	117 Good	128 Good	150 Good	157 Good	135 Good

data source »

Kumamoto

Thursday, August 27, 2026 at 10:00 AM

PM2,5 2.9 (Good)

particulate matter (PM2.5) dust

PM10 3.4 (Good)

particulate matter (PM10) suspended dust

O3 68 (Good)

ozone (O3)

NO2 2.5 (Good)

nitrogen dioxide (NO2)

SO2 2.6 (Good)

sulfur dioxide (SO2)

CO 128 (Good)

carbon monoxide (CO)

Kumamoto

index	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26	2026-08-27
pm25	6.2	7.7	9.9	10	8.5	5.7	3.3	5.6
pm10	7.3	8.7	12	12	9.4	7.4	4.4	6.5
o3	55	46	67	77	64	44	30	37
no2	7	11	8.9	7.5	6.3	6.3	4.8	11
so2	5.1	4.5	4.1	5.3	7	5.9	3	3.6
co	135	157	150	128	117	112	130	137

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Japan

16-day weather forecast for Japan: today around 32°C (rain), lows near 21°C. Daily temperature and conditions, updated every day. Wind is light today (about 6 km/h) — pollutants can build up near the ground.

☀️ UV Index · 16-day Forecast — Japan

The UV index in Japan today is 7.1 (high) — unprotected fair skin can burn in about 30 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Kumamoto — compare nearby locations.

Tokyo 30 µg/m³
Yokohama 30 µg/m³
Osaka City 8 µg/m³
Nagoya 17 µg/m³
Sapporo 6 µg/m³
Kōbe Shi 7 µg/m³
Kyoto 6 µg/m³
Fukuoka City 6 µg/m³

Frequently asked questions

Is the air safe to breathe in Kumamoto today?

The current average PM2.5 across Kumamoto is about 3 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.

What is the current PM2.5 level in Kumamoto?

Right now PM2.5 in Kumamoto averages about 3 µg/m³ (“Good”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Kumamoto?

Over the past week, the highest daily PM2.5 in Kumamoto was recorded on Sunday, August 23 (about 10 µg/m³).

What is the UV index in Kumamoto today?

The UV index in Kumamoto today is 7.1 (high) — unprotected fair skin can burn in about 30 minutes.

Does today's wind help disperse smog in Kumamoto?

Wind is light today (about 6 km/h) — pollutants can build up near the ground.

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.