Air quality for ultrafine particulate matter nationwide is forecast to be "Good" on September 22, 2026.
According to the Korea Environment Corporation’s forecast overview, all regions are expected to range from “Good” to “Moderate.”
Regarding the cause, the agency analyzed that “air quality is expected to be generally clean due to smooth vertical (upper and lower layers) dispersion.”
Since PM2.5 concentrations will not be high in any region, there should be no significant disruption to outdoor activities.
[PM2.5 Ratings by Region]
Moderate — Jeonbuk, Incheon (2 regions)
Good — Seoul, Jeju, Jeonnam, Gwangju, Gyeongnam, Gyeongbuk, Ulsan, Daegu, Busan, Chungnam, Chungbuk, Sejong, Daejeon, Yeongdong, Yeongseo, Southern Gyeonggi, Northern Gyeonggi (17 regions)
Moderate — Jeonbuk, Incheon (2 regions)
Good — Seoul, Jeju, Jeonnam, Gwangju, Gyeongnam, Gyeongbuk, Ulsan, Daegu, Busan, Chungnam, Chungbuk, Sejong, Daejeon, Yeongdong, Yeongseo, Southern Gyeonggi, Northern Gyeonggi (17 regions)
※ This article was automatically generated by a robot reporter based on air quality forecast data from the Korea Environment Corporation. (Release date: September 22, 2026, at 5:00 a.m.)
