Incheon’s Air Quality Crisis: A Deep Dive into Korea’s Pollution Challenges
As of February 11, 2026, Incheon, South Korea, is grappling with hazardous air quality, ranking as the 6th most polluted major city globally. The Air Quality Index (AQI) reached 164, categorized as ‘unhealthy’ by IQAir, impacting the health of all residents, particularly vulnerable groups.
What’s Driving the Pollution Spike?
The current deterioration in air quality is attributed to a combination of factors. The influx of fine dust from abroad, coupled with stagnant winter weather patterns, has led to a localized accumulation of pollutants. This situation is not isolated to Incheon, with neighboring cities like Seoul, Suwon, Sejong, Gunsan, Seosan, Cheongju, Daejeon, Gwangju, and Cheonan likewise experiencing elevated pollution levels.
Even as the current conditions represent a temporary surge, the average PM2.5 concentration in Incheon for 2024 was 19.1 µg/m³, corresponding to an AQI of 65 (‘Moderate’). This is 3.8 times higher than the World Health Organization (WHO) annual guideline of 5 µg/m³.
Incheon, South Korea, was ranked the 6th most polluted major city as of 4:00 AM PST on February 11, 2026. Source: IQAir.
Looking Ahead: When Will the Air Clear?
Forecasts indicate a gradual improvement in air quality beginning later in the day. Strengthening winds are expected to disperse the accumulated particulate matter, enhancing visibility. Over the past 30 days, Incheon’s air quality has largely remained within ‘moderate’ ranges, suggesting the current situation is a short-term spike rather than a sustained decline.
Hourly air quality forecast for Incheon, South Korea, February 11, 2026. Source: IQAir.
The Transboundary Pollution Problem
Research consistently points to transboundary pollution from China as a significant contributor to South Korea’s fine dust levels. Studies estimate that approximately 19% of Korea’s particulate matter originates from outside its borders, with up to 55% of fine dust in certain months traceable to emissions from China.
This influence is driven by prevailing westerly winds carrying pollutants from industrial regions in eastern China. When atmospheric conditions are stable, these particles can linger over the Korean peninsula. Domestic emissions from industrial operations and traffic in cities like Incheon further exacerbate local pollution levels.
Recent studies have also identified elevated concentrations of chromium(VI), manganese, and arsenic in Incheon’s particulate matter, increasing health risks and contributing to the overall AQI. This highlights the complex interplay between cross-border pollution and local sources.
Protecting Yourself from Poor Air Quality
When the air quality is unhealthy, limiting prolonged outdoor activities is advisable. Consider wearing a mask when venturing outside and using indoor air purifiers. Staying informed about real-time air quality data through resources like the IQAir Incheon Air Quality Map is crucial.
Daily air quality trend >Incheon, South Korea, over the past 30 days. Source: IQAir. 
Air quality map of Incheon, South Korea, February 11, 2026. Source: IQAir.
Frequently Asked Questions
- What is a healthy AQI? An AQI of 0-50 is considered good, meaning air quality is satisfactory and poses little to no health risk.
- Who is most affected by poor air quality? Children, the elderly, pregnant women, and individuals with heart or lung conditions are particularly vulnerable.
- Where can I find real-time air quality information? IQAir provides comprehensive, real-time air quality data and forecasts.
Pro Tip: Download a reliable air quality app on your smartphone to receive alerts when pollution levels are high in your area.
Stay informed and seize necessary precautions to protect your health during periods of poor air quality. Explore more articles on environmental health and sustainable living on our website.
