Air Quality Lab — Ulsan, South Korea
Air Quality Profile·
Ulsan reports an annual PM2.5 of 21.1 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Ulsan
South Korea
South KoreaAnnual Average
ModerateWHO annual classification
21.1µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
2020 µg/m³ — Moderate
2323 µg/m³ — Moderate
2222 µg/m³ — Moderate
2424 µg/m³ — Moderate
2121 µg/m³ — Moderate
2222 µg/m³ — Moderate
2424 µg/m³ — Moderate
2020 µg/m³ — Moderate
1818 µg/m³ — Moderate
1919 µg/m³ — Moderate
2121 µg/m³ — Moderate
2121 µg/m³ — Moderate
Jan
Feb
Mar
Apr
May
Jun
2020 µg/m³ — Moderate
2323 µg/m³ — Moderate
2222 µg/m³ — Moderate
2424 µg/m³ — Moderate
2121 µg/m³ — Moderate
2222 µg/m³ — Moderate
Jul
Aug
Sep
Oct
Nov
Dec
2424 µg/m³ — Moderate
2020 µg/m³ — Moderate
1818 µg/m³ — Moderate
1919 µg/m³ — Moderate
2121 µg/m³ — Moderate
2121 µg/m³ — Moderate
Best months: Aug–OctWorst months: Feb, Apr, Jul
Moderate15–25 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across South Korea
Ulsan: 21.1 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