Air Quality
2.9/5
21.1 µg/m³Sensitive Groups
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: ●●●
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.
UlsanSouth 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: ●●●
Who thrives in Ulsan
Things to consider in Ulsan
PM2.5 annual average of 21.1 µg/m³ exceeds the WHO interim target of 15 µg/m³. The WHO guideline value is 5 µg/m³.
Data sources: WHO (air quality), OECD (safety).
Why not Ulsan?
Why not Ulsan? Honestly, air quality could be better — Ulsan's 21.1 µg/m³ annual PM2.5 is above WHO guidelines, though still within ranges common for larger cities.
Frequently asked about Ulsan
▶How many sunny days does Ulsan have per year?
Ulsan averages approximately 214 sunny days per year, based on historical climate data.
▶What is the air quality in Ulsan?
Ulsan has an annual PM2.5 concentration of 21.1 µg/m³, classified as "Moderate" by WHO standards. Above WHO targets. Some respiratory effects possible with prolonged exposure.