On July 23, 2026, the nationwide air quality for ultrafine particulate matter is forecast to be at the "Good" level.
According to the Korea Environment Corporation’s forecast overview, all regions are expected to be rated “Good.”
Regarding the cause, the agency analyzed that “air quality is expected to be clean due to favorable atmospheric dispersion and precipitation.”
Since PM2.5 concentrations will not be high across all regions, there should be no significant disruption to outdoor activities.
[PM2.5 Levels by Region]
Good — Seoul, Jeju, South Jeolla, North Jeolla, Gwangju, South Gyeongsang, North Gyeongsang, Ulsan, Daegu, Busan, South Chungcheong, North Chungcheong, Sejong, Daejeon, Yeongdong, Yeongseo, Southern Gyeonggi, Northern Gyeonggi, Incheon (19 locations)
Good — Seoul, Jeju, South Jeolla, North Jeolla, Gwangju, South Gyeongsang, North Gyeongsang, Ulsan, Daegu, Busan, South Chungcheong, North Chungcheong, Sejong, Daejeon, Yeongdong, Yeongseo, Southern Gyeonggi, Northern Gyeonggi, Incheon (19 locations)
※ This article was automatically generated by a robot reporter based on air quality forecast data from the Korea Environment Corporation. (Release date: July 23, 2026, 5:00 a.m.)
