Air quality for ultrafine particulate matter nationwide is forecast to be "moderate" on September 28, 2026.
According to the Korea Environment Corporation’s forecast overview, all regions are expected to range from “Good” to “Moderate.”
Regarding the causes, the agency analyzed: “While concentrations have increased in some central and western regions due to the accumulation of domestically generated fine dust caused by stagnant air, ‘moderate’ levels of foreign fine dust are expected to flow in from the northwest starting at dawn and move southeastward, resulting in a ‘moderate’ daily average concentration in most areas.”
Since PM2.5 concentrations will not be high across all regions, there should be no significant disruption to outdoor activities.
Moderate — South Jeolla, North Jeolla, Gwangju, South Gyeongsang, North Gyeongsang, Ulsan, Daegu, Busan, South Chungcheong, North Chungcheong, Sejong, Daejeon, Southern Gyeonggi (13 regions)
Good — Seoul, Jeju, Yeongdong, Yeongseo, Northern Gyeonggi, Incheon (6 regions)
※ This article was automatically generated by a robot reporter based on air quality forecast data from the Korea Environment Corporation. (Release date: September 28, 2026, 5:00 a.m.)
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