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

Latest air quality data: Ōta-ku

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

particulate matter (PM2.5) dust - 30 (Moderate)
particulate matter (PM10) suspended dust - 36 (Moderate)
ozone (O3) - 38 (Good)
nitrogen dioxide (NO2) - 34 (Good)
sulfur dioxide (SO2) - 35 (Good)
carbon monoxide (CO) - 318 (Good)

Real-time Air Quality Index (AQI) for Ōta-ku, Thursday, August 27, 2026: 2.

AQI 2 Moderate

What is the air quality in Ōta-ku today? Is the air polluted in Ōta-ku?. Is there smog?

Today (Thursday, August 27, 2026) air quality is moderate in Ōta-ku. Some pollutants in Ōta-ku may slightly affect very few hypersensitive individuals. Air pollutants in Ōta-ku may cause minor breathing discomfort to sensitive people.

What is the current level of PM2.5 in Ōta-ku? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 30 (Moderate) For comparison, the highest level of PM2.5 in Ōta-ku in the last 7 days was: 40 (Saturday, August 22, 2026) and the lowest: 18 (Tuesday, August 25, 2026).

What is the level of PM10 today in Ōta-ku? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Ōta-ku is: 36 (Moderate)

How is the O3 level today in Ōta-ku? (ozone (O3))
38 (Good)

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

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

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

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

PM2,5 30 (Moderate)

PM10 36 (Moderate)

O3 38 (Good)

NO2 34 (Good)

SO2 35 (Good)

CO 318 (Good)

Data on air pollution from recent days in Ōta-ku

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	31 Moderate	20 Moderate	18 Moderate	28 Moderate	28 Moderate	40 Unhealthy for Sensitive Groups	25 Moderate	22 Moderate
pm10	34 Moderate	22 Moderate	20 Moderate	29 Moderate	28 Moderate	41 Moderate	27 Moderate	26 Moderate
o3	31 Good	49 Good	54 Good	82 Moderate	65 Good	40 Good	34 Good	30 Good
no2	51 Moderate	33 Good	31 Good	52 Moderate	52 Moderate	58 Moderate	35 Good	38 Good
so2	38 Good	25 Good	20 Good	35 Good	31 Good	38 Good	28 Good	27 Good
co	315 Good	314 Good	281 Good	375 Good	247 Good	306 Good	244 Good	299 Good

data source »

Ōta-ku

Thursday, August 27, 2026 at 10:00 AM

PM2,5 30 (Moderate)

particulate matter (PM2.5) dust

PM10 36 (Moderate)

particulate matter (PM10) suspended dust

O3 38 (Good)

ozone (O3)

NO2 34 (Good)

nitrogen dioxide (NO2)

SO2 35 (Good)

sulfur dioxide (SO2)

CO 318 (Good)

carbon monoxide (CO)

Ōta-ku

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	22	25	40	28	28	18	20	31
pm10	26	27	41	28	29	20	22	34
o3	30	34	40	65	82	54	49	31
no2	38	35	58	52	52	31	33	51
so2	27	28	38	31	35	20	25	38
co	299	244	306	247	375	281	314	315

* 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 Ōta-ku — 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 Ōta-ku today?

The current average PM2.5 across Ōta-ku is about 30 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Ōta-ku?

Right now PM2.5 in Ōta-ku averages about 30 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Ōta-ku?

Over the past week, the highest daily PM2.5 in Ōta-ku was recorded on Saturday, August 22 (about 40 µg/m³).

What is the UV index in Ōta-ku today?

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

Does today's wind help disperse smog in Ōta-ku?

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.