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Sejong Air Quality Index (AQI) | Air Pollution

Real-time PM2.5, PM10 air pollution level in South Korea

Last Updated: 2025-11-05 04:34:30 PM (Local Time)

location image
Live AQI
120(AQI-US)
Air Quality is
Poor
pm10 :  59 µg/m³
PM2.5 :  43 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi poor level.webp in Sejong
sunny

17 °C

Sunny
Humidity
Humidity42 %

Wind Speed
Wind Speed6 km/h

UV Index
UV Index1
Last Updated: 2025-11-05 04:34:30 PM (Local Time)


Map

Sejong

Major Air Pollutants

Sejong

AQI Graph

Historical Air Quality Data

Sejong

Sejong
AQI
.
04-11-2025Time05-11-2025
46
Min.at 4:40 PM on 4th Nov
125
Max.at 3:04 PM on 5th Nov

Download 2024 Annual Data

World Air Quality Report

Globe

Sejong's Cities

Real-time Air Pollution Level

Location
Status
AQI
PM2.5(µg/m³)
PM10(µg/m³)
Temp.(°C)
Humi.(%)
Poor
120
43
59
17
42

South Korea's Metro Cities

Air Quality Index

Health Advice For People Living In

Sejong

1.2Cigarettes per day

Cigarette
Weekly 8.4 Cigarettes
Monthly 36 Cigarettes

Breathing the air in this location is as harmful as smoking 1.2 cigarettes a day.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI

  • Air Purifier
    Air PurifierTurn On
  • Car Filter
    Car FilterMust
  • N95 Mask
    N95 MaskMust
  • Stay Indoor
    Stay IndoorMust


Must turn on the air purifier to enjoy fresh air.

Get an Air Purifier

Prevent Health Problems: Understand Your Risks

Sejong

  • asthma due to air pollution in SejongAsthma
  • heart due to air pollution in SejongHeart Issues
  • allergy due to air pollution in SejongAllergies
  • sinus due to air pollution in SejongSinus
  • flu due to air pollution in SejongCold/Flu
  • copd due to air pollution in SejongChronic (COPD)
asthma due to air pollution in Sejong

Mild Chances of Asthma

Asthma

Risk of Asthma symptoms is Mild when AQI is Poor (50-150)

Moderate symptoms including frequent wheezing, noticeable shortness of breath, chest tightness, and persistent cough.

Do's :

  • Limit outdoor activities when AQI is poor.

  • Clean indoor air with an air purifier to reduce exposure.

  • Soothe the respiratory tract with herbal teas or warm water to help alleviate symptoms.

Don'ts :

  • Exercise outdoors without a mask.

  • Stay in smoky areas with strong fumes.

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

Most Polluted Cities 2025

South Korea

Analyze the real-time most air polluted cities in the country.

Sejong's AQI Data Analytics Solutions

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aqi air quality app for Sejong
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Empower Your Decisions with Reliable Data

Your area’s real-time data with detailed parameters.

Your area’s real-time data with detailed parameters.


Personalized health advice as per current AQI.

Personalized health advice as per current AQI.


Analytical data to identify trends and conditions.

Analytical data to identify trends and conditions.


Connect and control your air quality devices.

Connect and control your air quality devices.


Air Quality FAQs

at Sejong

Frequently Asked Questions About Air Quality

What is the current AQI level in Sejong?

The current real-time AQI level in Sejong is 120 (Poor). This was last updated 2025-11-05 04:34:30 PM (Local Time).

When was the best AQI level in Sejong in the last 24 hours?

The best AQI level was 46 (Good) at 4:40 PM, Nov 4, 2025 (Local Time) during the last 24 hours.

When was the worst AQI level in Sejong in the last 24 hours?

The worst AQI level was 125 (Poor) at 3:04 PM (Local Time) during the last 24 hours.

What is the current trend of AQI levels in Sejong during last 24 hours?

The AQI levels in Sejong have been fluctuating throughout the last 24 hours. The levels have increased by highest 125 at 3:04 PM (Local Time), lowest 46 at 4:40 PM, Nov 4, 2025 (Local Time).

What actions are recommended as per the current AQI level in Sejong?

Current AQI levels are unhealthy for Sensitive individuals, they should reduce prolonged or heavy outdoor exertion.