SmogRank / World / Asia / South Korea / Ulsan

Most polluted cities in Ulsan, South Korea

1 measured city, last 7 days; 0 above the WHO 24-hour guideline. Worst: Ulsan at 11.1 µg/m³, #601 in the world.

Busan: 2 measured citiesGyeongsangbuk-do: 16 measured citiesGyeongsangnam-do: 13 measured citiesUlsan: 1 measured city#1 Ulsan: 11.1 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Ulsan 11.1
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Use this board

SmogRank, most polluted cities in Ulsan, South Korea, PM2.5, last 7 days to 2 Oct 2026, 06:00 UTC, smogrank.com/kr/region/ulsan?w=7d.

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.