South Korea

Ulsan

Name: Ulsan
Address: South Korea

Moderate

Air Quality Index

Updated Mar 21, 02:00 AM · Data from OpenAQ

Current Pollution Levels in Ulsan

PM2.5

Moderate

µg/m³

PM10

Good

µg/m³

O₃

—

0.0443

ppm

Ulsan Air Quality 24-Hour Trend

Air Quality Analysis for Ulsan

Ulsan, South Korea air quality this morning is rated Moderate with an Air Quality Index (AQI) of 89. The primary pollutant PM2.5 is measured at 30 µg/m³. PM10 (coarse particles) is at 53 µg/m³.

The current PM2.5 level exceeds the WHO annual guideline of 15 µg/m³ but remains within the 24-hour limit of 45 µg/m³. Long-term exposure at this level may still affect sensitive individuals.

PM2.5 levels are stable, staying close to the recent average of 26.0 µg/m³.

Health Recommendation

Air quality in Ulsan is acceptable. Most people can enjoy outdoor activities normally. Unusually sensitive individuals should consider limiting prolonged outdoor exertion.

Outdoor Exercise

Acceptable for most

Window Ventilation

OK for short periods

Recent Ulsan Air Quality Measurements

Time	AQI	PM2.5	PM10
02:00 AM	89	30	53
01:00 AM	76	24	47
12:00 AM	76	24	41
11:55 PM	76	24	41
11:22 PM	74	23	44
11:08 PM	91	31	39

Frequently Asked Questions

Is air quality in Ulsan safe today?

Ulsan air quality is moderate today with an AQI of 89. Most people can safely go outside, but unusually sensitive individuals may experience minor symptoms.

What AQI level is considered unhealthy?

According to EPA standards, AQI 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for Sensitive Groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and above 300 is Hazardous. The WHO recommends annual PM2.5 levels below 15 µg/m³ for optimal health.

Should I wear a mask today in Ulsan?

With Ulsan's current AQI of 89, masks are generally not necessary for most people. However, if you have respiratory conditions, a mask may provide additional comfort.