On July 28, 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 range from “Good” to “Moderate.”
Regarding the causes, the agency analyzed, “In some inland central regions, concentrations will rise in the afternoon as ‘Moderate’ levels of foreign particulate matter are carried in by northwesterly air currents, while in some southeastern regions, domestically generated particulate matter will accumulate due to air convergence, resulting in a daily average concentration of ‘Moderate.’”
Since PM2.5 concentrations will not be high across all regions, outdoor activities are not expected to be significantly affected.
Moderate — Ulsan, Yeongseo, Northern Gyeonggi (3 regions)
Good — Seoul, Jeju, South Jeolla, North Jeolla, Gwangju, South Gyeongsang, North Gyeongsang, Daegu, Busan, South Chungcheong, North Chungcheong, Sejong, Daejeon, Yeongdong, Southern Gyeonggi, Incheon (16 regions)
※ This article was automatically generated by a robot reporter based on air quality forecast data from the Korea Environment Corporation. (Release date: July 28, 2026, 5:00 a.m.)
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