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.

Good0–9.0

Moderate9.1–35.4

Sensitive groups35.5–55.4

Unhealthy55.5–125.4

Very unhealthy125.5–225.4

Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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, 04:00 UTC, smogrank.com/kr/region/ulsan.

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Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.