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

2 weather warnings in effect for South Korea 🌡️ Extreme heat💨 Strong wind

Latest air quality data: Seoul

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

particulate matter (PM2.5) dust - 12 (Good)
particulate matter (PM10) suspended dust - 13 (Good)
ozone (O3) - 36 (Good)
nitrogen dioxide (NO2) - 36 (Good)
sulfur dioxide (SO2) - 26 (Good)
carbon monoxide (CO) - 306 (Good)

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

AQI 1 Good

What is the air quality in Seoul today? Is the air polluted in Seoul?. 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 Seoul.

What is the current level of PM2.5 in Seoul? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 12 (Good) For comparison, the highest level of PM2.5 in Seoul in the last 7 days was: 44 (Friday, August 21, 2026) and the lowest: 10 (Tuesday, August 25, 2026).

What is the level of PM10 today in Seoul? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Seoul is: 13 (Good)

How is the O3 level today in Seoul? (ozone (O3))
36 (Good)

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

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

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

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

PM2,5 12 (Good)

PM10 13 (Good)

O3 36 (Good)

NO2 36 (Good)

SO2 26 (Good)

CO 306 (Good)

Data on air pollution from recent days in Seoul

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	20 Moderate	19 Moderate	10 Good	25 Moderate	20 Moderate	20 Moderate	44 Unhealthy for Sensitive Groups	42 Unhealthy for Sensitive Groups
pm10	20 Moderate	21 Moderate	13 Good	26 Moderate	21 Moderate	20 Moderate	44 Moderate	45 Moderate
o3	30 Good	20 Good	41 Good	31 Good	36 Good	17 Good	26 Good	32 Good
no2	44 Moderate	49 Moderate	30 Good	42 Moderate	45 Moderate	53 Moderate	76 Moderate	81 Moderate
so2	22 Good	28 Good	12 Good	27 Good	24 Good	21 Good	33 Good	36 Good
co	369 Good	477 Good	303 Good	433 Good	345 Good	379 Good	506 Good	601 Good

data source »

Quality of life in Seoul

Green and Parks in the City

Seoul 62%

Japan: 65% Taiwan: 53% Hong Kong: 52%

particulate matter PM2.5

Seoul 26 (Moderate)

Pleasure of spending time in the city

Seoul 49%

North Korea: 44% Japan: 69% Taiwan: 47% Hong Kong: 43%

particulate matter PM10

Seoul 48 (Moderate)

Air Pollution

Seoul 66%

North Korea: 44% Japan: 33% Taiwan: 61% Hong Kong: 67%

Garbage Disposal

Seoul 64%

North Korea: 47% Japan: 71% Taiwan: 65% Hong Kong: 52%

Availability and quality of drinking water

Seoul 74%

North Korea: 47% Japan: 73% Taiwan: 54% Hong Kong: 66%

Cleanliness and tidiness

Seoul 67%

North Korea: 58% Japan: 74% Taiwan: 56% Hong Kong: 54%

Noise and Light pollution

Seoul 49%

North Korea: 33% Japan: 44% Taiwan: 59% Hong Kong: 66%

Water Pollution

Seoul 36%

North Korea: 56% Japan: 36% Taiwan: 58% Hong Kong: 53%

Source: Numbeo

Seoul

Thursday, August 27, 2026 at 10:00 AM

PM2,5 12 (Good)

particulate matter (PM2.5) dust

PM10 13 (Good)

particulate matter (PM10) suspended dust

O3 36 (Good)

ozone (O3)

NO2 36 (Good)

nitrogen dioxide (NO2)

SO2 26 (Good)

sulfur dioxide (SO2)

CO 306 (Good)

carbon monoxide (CO)

Seoul

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	42	44	20	20	25	10	19	20
pm10	45	44	20	21	26	13	21	20
o3	32	26	17	36	31	41	20	30
no2	81	76	53	45	42	30	49	44
so2	36	33	21	24	27	12	28	22
co	601	506	379	345	433	303	477	369

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

🌦️ Weather · 16-day Forecast — Seoul

16-day weather forecast for Seoul: today around 33°C (rain), lows near 25°C. Daily temperature and conditions, updated every day. A moderate breeze (about 14 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — Seoul

The UV index in Seoul today is 7 (high) — unprotected fair skin can burn in about 30 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Seoul — compare nearby locations.

Goyang 12 µg/m³
Anyang 18 µg/m³
Seongnam 20 µg/m³
Uijeongbu 20 µg/m³
Incheon 12 µg/m³
Suwon 27 µg/m³
Hwaseong 18 µg/m³
Busan 8 µg/m³

Frequently asked questions

Is the air safe to breathe in Seoul today?

The current average PM2.5 across Seoul is about 12 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.

What is the current PM2.5 level in Seoul?

Right now PM2.5 in Seoul averages about 12 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 Seoul?

Over the past week, the highest daily PM2.5 in Seoul was recorded on Friday, August 21 (about 44 µg/m³).

What is the UV index in Seoul today?

The UV index in Seoul today is 7 (high) — unprotected fair skin can burn in about 30 minutes.

Does today's wind help disperse smog in Seoul?

A moderate breeze (about 14 km/h) is partially dispersing pollutants today.

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.