Daejeon: 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: Daejeon

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

particulate matter (PM2.5) dust - 28 (Moderate)
particulate matter (PM10) suspended dust - 29 (Moderate)
ozone (O3) - 87 (Moderate)
nitrogen dioxide (NO2) - 52 (Moderate)
sulfur dioxide (SO2) - 21 (Good)
carbon monoxide (CO) - 326 (Good)

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

AQI 2 Moderate

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

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

What is the current level of PM2.5 in Daejeon? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 28 (Moderate) For comparison, the highest level of PM2.5 in Daejeon in the last 7 days was: 31 (Thursday, August 27, 2026) and the lowest: 10 (Thursday, August 20, 2026).

What is the level of PM10 today in Daejeon? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Daejeon is: 29 (Moderate)

How is the O3 level today in Daejeon? (ozone (O3))
87 (Moderate)

How high is the level of NO2? (nitrogen dioxide (NO2))
52 (Moderate)

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

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

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

PM2,5 28 (Moderate)

PM10 29 (Moderate)

O3 87 (Moderate)

NO2 52 (Moderate)

SO2 21 (Good)

CO 326 (Good)

Data on air pollution from recent days in Daejeon

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	27 Moderate	15 Moderate	22 Moderate	17 Moderate	18 Moderate	13 Moderate	10 Good
pm10	32 Moderate	28 Moderate	16 Good	22 Moderate	17 Good	18 Good	13 Good	11 Good
o3	59 Good	86 Moderate	49 Good	72 Moderate	69 Good	54 Good	38 Good	72 Moderate
no2	69 Moderate	50 Moderate	39 Good	45 Moderate	30 Good	40 Moderate	51 Moderate	36 Good
so2	17 Good	12 Good	10 Good	13 Good	7 Good	8 Good	6 Good	6 Good
co	453 Good	564 Good	419 Good	368 Good	404 Good	328 Good	465 Good	517 Good

data source »

Quality of life in Daejeon

Green and Parks in the City

Daejeon 60%

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

particulate matter PM2.5

Daejeon 22 (Moderate)

Pleasure of spending time in the city

Daejeon 52%

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

particulate matter PM10

Daejeon 44 (Moderate)

Air Pollution

Daejeon 66%

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

Garbage Disposal

Daejeon 68%

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

Availability and quality of drinking water

Daejeon 75%

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

Cleanliness and tidiness

Daejeon 58%

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

Noise and Light pollution

Daejeon 40%

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

Water Pollution

Daejeon 43%

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

Source: Numbeo

Daejeon

Thursday, August 27, 2026 at 10:00 AM

PM2,5 28 (Moderate)

particulate matter (PM2.5) dust

PM10 29 (Moderate)

particulate matter (PM10) suspended dust

O3 87 (Moderate)

ozone (O3)

NO2 52 (Moderate)

nitrogen dioxide (NO2)

SO2 21 (Good)

sulfur dioxide (SO2)

CO 326 (Good)

carbon monoxide (CO)

Daejeon

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	10	13	18	17	22	15	27	31
pm10	11	13	18	17	22	16	28	32
o3	72	38	54	69	72	49	86	59
no2	36	51	40	30	45	39	50	69
so2	6.2	6.2	7.9	6.5	13	10	12	17
co	517	465	328	404	368	419	564	453

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

🌦️ Weather · 16-day Forecast — South Korea

16-day weather forecast for South Korea: today around 32°C (cloudy), lows near 21°C. Daily temperature and conditions, updated every day. A moderate breeze (about 7 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — South Korea

The UV index in South Korea today is 7.4 (high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Daejeon — compare nearby locations.

Cheonan 32 µg/m³
Jeonju 26 µg/m³
Hwaseong 18 µg/m³
Suwon 27 µg/m³
Daegu 12 µg/m³
Seongnam 20 µg/m³
Anyang 18 µg/m³
Gwangju 10 µg/m³

Frequently asked questions

Is the air safe to breathe in Daejeon today?

The current average PM2.5 across Daejeon is about 28 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 Daejeon?

Right now PM2.5 in Daejeon averages about 28 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 Daejeon?

Over the past week, the highest daily PM2.5 in Daejeon was recorded on Thursday, August 27 (about 31 µg/m³).

What is the UV index in Daejeon today?

The UV index in Daejeon today is 7.4 (high) — unprotected fair skin can burn in about 25 minutes.

Does today's wind help disperse smog in Daejeon?

A moderate breeze (about 7 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.