Ulsan Moderate

Ulsan, Ulsan

Updated: May 12, 2026, 12:00 AM

Moderate

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

Current Weather

15.8°C

Temperature

85%

Humidity

3.7

mph wind

Mainly clear

Conditions

Pollutant Breakdown

PM2.5

µg/m³ · Fine particles

PM10

µg/m³ · Coarse particles

34.1

Ozone

ppb · Ground-level ozone

8.6

NO₂

ppb · Nitrogen dioxide

SO₂

ppb · Sulfur dioxide

2.9

ppm · Carbon monoxide

Dominant pollutant: PM25

PM2.5 Forecast (next 7 days)

Sun

5/10

avg

Mon

5/11

avg

Tue

5/12

avg

Wed

5/13

avg

Thu

5/14

109

avg

Fri

5/15

109

avg

Sat

5/16

avg

Health Guidance

⚠️

Unusually sensitive people: Consider reducing prolonged outdoor exertion.

✅

General population: No restrictions for most people.

💨

Keep windows closed if AQI is Unhealthy or above. Use HEPA air purifiers indoors.

Data from: South Air Korea Environment Corporation (대기오염실시간공개시스템), World Air Quality Index Project

Is the air safe in Ulsan today?

The current Air Quality Index (AQI) in Ulsan is 70, which is classified as "Moderate". Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

The AQI scale runs from 0 to 500. Values of 0–50 are Good, 51–100 are Moderate, 101–150 are Unhealthy for Sensitive Groups, 151–200 are Unhealthy, 201–300 are Very Unhealthy, and 301–500 are Hazardous.

Air quality in Ulsan, Ulsan is monitored by local environmental agencies and reported through the World Air Quality Index project. Data is updated hourly and includes PM2.5, PM10, ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide.

AQI Scale Reference

0–50

Good

51–100

Moderate

101–150

Unhealthy for Sensitive Groups

151–200

Unhealthy

201–300

Very Unhealthy

301+

Hazardous