1. Seasonal Air Quality Patterns
Between late February and May, seasonal winds occasionally transport desert dust storms (Hwangsa) from the Gobi Desert, coinciding with regional temperature inversions producing elevated particulate matter (PM10 and PM2.5).
2. Monitoring Levels with AirKorea
Check real-time air quality via the government portal airkorea.or.kr or mobile apps like MiseMise (8-stage color grade) and IQAir:
- Blue / Green (Good / Moderate): Safe for unrestricted outdoor hiking and sightseeing.
- Yellow / Orange (Unhealthy for Sensitive Groups): Wear a light mask if experiencing respiratory sensitivities.
- Red / Purple (Very Unhealthy): Avoid prolonged strenuous outdoor activity; wear an authenticated KF94 mask.
3. Buying KF94 Respirator Masks
Purchase authenticated "KF94" (Korean Filter 94% filtration efficiency) masks at any pharmacy (Yakguk), convenience store, or Olive Young store for 1,000 - 1,500 KRW per piece.
4. Best Indoor Sightseeing Alternatives on High-Dust Days
- National Museum of Korea (Ichon Station)
- Starfield Library & COEX Mall (Samseong Station)
- Lotte World Indoor Adventure & Seoul Sky (Jamsil)
- DDP Dongdaemun Design Plaza underground galleries