The air quality in Korea seems really bad sometimes, especially in spring?

Fine dust (미세먼지, miseomeonji) is one of the biggest health concerns in Korea, especially from March to May when westerly winds carry pollution from China combined with domestic emissions. Here is what you need to know.

Two measurements matter. PM10 (larger particles) and PM2.5 (smaller, more dangerous). PM2.5 penetrates deep into lungs and can enter the bloodstream, linked to respiratory disease, heart problems, and reduced life expectancy. Korea has its own air quality index (좋음 good, 보통 moderate, 나쁨 bad, 매우 나쁨 very bad).

Monitoring. Install the AirVisual or Misemise app for real-time PM2.5 readings. Korean weather apps like Naver and Kakao Map show daily air quality forecasts. Yellow dust (황사) is the seasonal sand storm phenomenon from late winter to spring, often combined with fine dust.

Protection at home. Use a HEPA air purifier with regular filter changes. Brands like LG, Samsung, Coway, Dyson, and Xiaomi all sell good models from 200,000 to 1,500,000 won. Run continuously on bad air days. Seal windows and weather strip doors. Avoid opening windows during high-pollution days.

Masks outdoors. KF80 or KF94 masks (KF stands for Korean Filter) filter fine dust effectively. KF94 is the gold standard, available at convenience stores and pharmacies for 1,000 to 2,500 won each. Wear one when air quality is rated bad or worse.

Lifestyle. Avoid outdoor exercise on high pollution days. Drink plenty of water to help your body clear particles. Wash hands and face when coming inside. Use saline nasal spray to clear nasal passages.

For sensitive groups (asthma, COPD, young children, elderly, pregnant), consult your doctor about additional precautions. Korean hospitals have respiratory clinics with English service for ongoing care.