Most polluted cities in Ulsan, South Korea

0 measured cities, last 24 hours.

Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.

No city has enough measurements for this window yet.

Excellent0–50

Good51–100

Lightly polluted101–150

Moderately polluted151–200

Heavily polluted201–300

Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Ulsan, South Korea, PM2.5, last 24 hours to 2 Oct 2026, 05:00 UTC, smogrank.com/kr/region/ulsan.

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Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the China AQI PM2.5 sub-index.