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

Latest air quality data: Hiroshima City

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

particulate matter (PM2.5) dust - 4 (Good)
particulate matter (PM10) suspended dust - 7 (Good)
ozone (O3) - 32 (Good)
nitrogen dioxide (NO2) - 2 (Good)
sulfur dioxide (SO2) - 1 (Good)
carbon monoxide (CO) - 166 (Good)

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

AQI 1 Good

What is the air quality in Hiroshima City today? Is the air polluted in Hiroshima City?. 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 Hiroshima City.

What is the current level of PM2.5 in Hiroshima City? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 4 (Good) For comparison, the highest level of PM2.5 in Hiroshima City in the last 7 days was: 10 (Saturday, August 22, 2026) and the lowest: 5 (Thursday, August 27, 2026).

What is the level of PM10 today in Hiroshima City? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Hiroshima City is: 7 (Good)

How is the O3 level today in Hiroshima City? (ozone (O3))
32 (Good)

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

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

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

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

PM2,5 4 (Good)

PM10 7 (Good)

O3 32 (Good)

NO2 2 (Good)

SO2 1 (Good)

CO 166 (Good)

Data on air pollution from recent days in Hiroshima City

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	5 Good	6 Good	6 Good	6 Good	8 Good	10 Good	7 Good	8 Good
pm10	6 Good	9 Good	8 Good	9 Good	10 Good	13 Good	9 Good	10 Good
o3	29 Good	35 Good	39 Good	58 Good	66 Good	67 Good	53 Good	50 Good
no2	5 Good	8 Good	8 Good	8 Good	9 Good	10 Good	10 Good	9 Good
so2	2 Good	3 Good	3 Good	3 Good	4 Good	4 Good	4 Good	3 Good
co	164 Good	156 Good	134 Good	147 Good	151 Good	189 Good	154 Good	170 Good

data source »

Quality of life in Hiroshima City

Green and Parks in the City

Hiroshima City 71%

South Korea: 61% Taiwan: 53% Northern Mariana Islands: 83% Guam: 29%

Pleasure of spending time in the city

Hiroshima City 70%

South Korea: 43% North Korea: 44% Taiwan: 47% Northern Mariana Islands: 81% Guam: 62%

Air Pollution

Hiroshima City 21%

South Korea: 69% North Korea: 44% Taiwan: 61% Northern Mariana Islands: 11% Guam: 33%

Garbage Disposal

Hiroshima City 79%

South Korea: 62% North Korea: 47% Taiwan: 65% Northern Mariana Islands: 42% Guam: 35%

Availability and quality of drinking water

Hiroshima City 83%

South Korea: 72% North Korea: 47% Taiwan: 54% Northern Mariana Islands: 56% Guam: 52%

Cleanliness and tidiness

Hiroshima City 83%

South Korea: 63% North Korea: 58% Taiwan: 56% Northern Mariana Islands: 56% Guam: 37%

Noise and Light pollution

Hiroshima City 21%

North Korea: 33% Taiwan: 59% Northern Mariana Islands: 42% Guam: 54%

Water Pollution

Hiroshima City 25%

South Korea: 38% North Korea: 56% Taiwan: 58% Northern Mariana Islands: 58% Guam: 46%

Source: Numbeo

Hiroshima City

Thursday, August 27, 2026 at 10:00 AM

PM2,5 4.4 (Good)

particulate matter (PM2.5) dust

PM10 6.6 (Good)

particulate matter (PM10) suspended dust

O3 32 (Good)

ozone (O3)

NO2 2 (Good)

nitrogen dioxide (NO2)

SO2 1 (Good)

sulfur dioxide (SO2)

CO 166 (Good)

carbon monoxide (CO)

Hiroshima City

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	7.8	7.2	9.8	7.8	6.3	5.6	6.4	4.5
pm10	10	9.4	13	10	8.5	7.8	9	6.4
o3	50	53	67	66	58	39	35	29
no2	9	10	9.7	9	7.7	8.4	7.8	5.1
so2	3.3	3.5	3.9	3.6	3.1	2.9	2.9	1.8
co	170	154	189	151	147	134	156	164

* 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 Hiroshima City — 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 Hiroshima City today?

The current average PM2.5 across Hiroshima City is about 4 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.

What is the current PM2.5 level in Hiroshima City?

Right now PM2.5 in Hiroshima City averages about 4 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 Hiroshima City?

Over the past week, the highest daily PM2.5 in Hiroshima City was recorded on Saturday, August 22 (about 10 µg/m³).

What is the UV index in Hiroshima City today?

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

Does today's wind help disperse smog in Hiroshima City?

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.