Air Quality Lab — Seoul, South Korea
Air Quality Profile
Seoul reports an annual PM2.5 of 26.6 µg/m³. That's above the EU annual limit of 25 µg/m³ — long-term exposure here carries documented health trade-offs.
Seoul
South Korea
South KoreaAnnual Average
PoorWHO annual classification
26.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2727 µg/m³ — Poor
2727 µg/m³ — Poor
3131 µg/m³ — Poor
2929 µg/m³ — Poor
2929 µg/m³ — Poor
2828 µg/m³ — Poor
2626 µg/m³ — Poor
2626 µg/m³ — Poor
2222 µg/m³ — Moderate
2323 µg/m³ — Moderate
2626 µg/m³ — Poor
2525 µg/m³ — Poor
Jan
Feb
Mar
Apr
May
Jun
2727 µg/m³ — Poor
2727 µg/m³ — Poor
3131 µg/m³ — Poor
2929 µg/m³ — Poor
2929 µg/m³ — Poor
2828 µg/m³ — Poor
Jul
Aug
Sep
Oct
Nov
Dec
2626 µg/m³ — Poor
2626 µg/m³ — Poor
2222 µg/m³ — Moderate
2323 µg/m³ — Moderate
2626 µg/m³ — Poor
2525 µg/m³ — Poor
Best months: Sep–Oct, DecWorst months: Mar–May
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
Seoul: 26.6 µg/m³. Typical range in South Korea: 18.7–23.0 µg/m³. Low anchor: Seogwipo, 14.0 µg/m³.
108 cities tracked