Air Quality Lab — Daejeon, South Korea
Air Quality Profile·
Daejeon reports an annual PM2.5 of 24.6 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Daejeon
South Korea
South KoreaAnnual Average
ModerateWHO annual classification
24.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2626 µg/m³ — Poor
2727 µg/m³ — Poor
3030 µg/m³ — Poor
2828 µg/m³ — Poor
2525 µg/m³ — Moderate
2626 µg/m³ — Poor
2121 µg/m³ — Moderate
2121 µg/m³ — Moderate
2121 µg/m³ — Moderate
2323 µg/m³ — Moderate
2424 µg/m³ — Moderate
2424 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2626 µg/m³ — Poor
2727 µg/m³ — Poor
3030 µg/m³ — Poor
2828 µg/m³ — Poor
2525 µg/m³ — Moderate
2626 µg/m³ — Poor
Jul
Aug
Sep
Oct
Nov
Dec
2121 µg/m³ — Moderate
2121 µg/m³ — Moderate
2121 µg/m³ — Moderate
2323 µg/m³ — Moderate
2424 µg/m³ — Moderate
2424 µg/m³ — Moderate
Best months: Jul–SepWorst months: Feb–Apr
Moderate15–25 µg/m³Poor25–35 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across South Korea
Daejeon: 24.6 µg/m³. Typical range in South Korea: 18.7–23.0 µg/m³. Low anchor: Seogwipo, 14.0 µg/m³. High anchor: Seoul, 26.6 µg/m³.
108 cities tracked