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Air Quality Index (AQI) in Keelung, Taiwan ๐Ÿ‡น๐Ÿ‡ผ

Air quality in Keelung is currently 106 on the US AQI scale, rated Moderate.

Light rain
25ยฐC
Light rain
AQI INDEX
106
US EPA Standard

PM 2.5 Level
37.5
ยตg/mยณ

US EPA Index
2
Moderate
The current Air Quality Index (AQI) in Keelung is recorded at 106 as of 7 o'clock in the evening local time this Tuesday, June 16, 2026. This real-time AQI score is based on the highest-risk pollutant measured by local monitoring stations. According to the US EPA health standard, air quality in Keelung currently falls into the Unhealthy (Sensitive) category. The atmosphere shows an elevated PM2.5 concentration of 37.5 ยตg/mยณ. At this Air Quality Index range, members of sensitive groups may experience health effects. For the AQI across entire Taiwan, you can also view the Air Quality Index for Taiwan covering other major urban centers and local monitoring stations.

Health Recommendations for Keelung Residents

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Air quality is acceptable. However, for some pollutants there may be a moderate health concern for a very small number of people. Sensitive groups should consider reducing prolonged outdoor exertion.

Keelung Air Pollution: Detailed Pollutant Breakdown

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Breathing Keelung's air today is roughly like smoking 1.7 cigarettes.
Based on the Berkeley Earth estimate that ~22 ยตg/mยณ of PM2.5 over a day is about one cigarette. Today's PM2.5 in Keelung is 37.5 ยตg/mยณ.
PM 2.5
37.5
ยตg/mยณ
PM 10
39.0
ยตg/mยณ
Nitrogen Dioxide (NO2)
66.4
ยตg/mยณ
Ozone (O3)
53.0
ยตg/mยณ
Carbon Monoxide (CO)
401.0
ยตg/mยณ
Sulfur Dioxide (SO2)
42.7
ยตg/mยณ

Current Weather in Keelung

๐ŸŒก๏ธ 25ยฐC (Feels like 28ยฐ)
๐ŸŒฌ๏ธ 4 km/h ESE
๐Ÿ’ง 100% Humidity
๐Ÿงญ 1009 hPa
๐Ÿ‘๏ธ 10.0 km Visibility
โ˜€๏ธ UV Index: 0.0
๐ŸŒ… Sunrise: 05:02 AM
๐ŸŒ‡ Sunset: 06:44 PM
๐ŸŒก๏ธ Dew Point: 24ยฐC

Keelung's Main Air Pollutant Today

The main concern in Keelung right now is NO2 at 66.4 ยตg/mยณ, about 2.7x the WHO 24-hour guideline.

Air Quality Health Advice for Keelung

General publicAir quality is acceptable for most people. Outdoor activity is fine.
Sensitive groupsUnusually sensitive people should consider easing prolonged or heavy exertion outdoors.

Air Quality in Other Cities in Taiwan

Browse Air Quality in Taiwan by cities in alphabetical order:

B D H K L M N P S T W X Y Z

Air Quality in Taiwan ›

Frequently Asked Questions about Air Quality in Keelung

What is the air quality (AQI) in Keelung right now?

The current air quality index in Keelung is 106 โ€” categorised as Moderate.

Is the air in Keelung safe to breathe today?

Today's air quality in Keelung is rated Moderate on the US EPA scale.

What is the PM2.5 level in Keelung right now?

The fine-particle (PM2.5) concentration in Keelung is currently 37.5 ยตg/mยณ. PM2.5 is the most health-relevant pollutant โ€” the WHO 24-hour guideline is 15 ยตg/mยณ.

What is the PM10 level in Keelung right now?

The coarse-particle (PM10) concentration in Keelung is currently 39.0 ยตg/mยณ.

What is the main pollutant in Keelung right now?

The dominant pollutant in Keelung right now is Carbon Monoxide (CO) at 401.0 ยตg/mยณ.

Is it safe to exercise outdoors in Keelung today?

With air quality currently rated Moderate, outdoor exercise in Keelung is generally considered safe for most people.

How to Read the Air Quality Index for Keelung

Good (0-50)

Air is fresh and healthy. Safe for all outdoor activities.

Moderate (51-100)

Acceptable air quality, though sensitive groups should monitor comfort.

Unhealthy (Sensitive) (101-150)

Vulnerable groups (children, elderly) should limit outdoor exertion.

Unhealthy (151-200)

Everyone begins to experience health effects. Stay indoors where possible.

Very Unhealthy (201-300)

Significant health impact for entire population. Emergency conditions.

Hazardous (301+)

Serious health alert: everyone may experience serious life-threatening effects.

Good (0-12)

Fine particles are at minimal, safe levels. Air is optimal.

Moderate (12-35)

Acceptable air, but haze may be present in urban areas.

Sensitive (35-55)

Individuals with heart or lung disease should limit activity.

Unhealthy (55-150)

Particulate levels high enough to cause respiratory irritation.

Very Unhealthy (150-250)

Heavy haze. High risk to cardiovascular health for the public.

Hazardous (250+)

Lethal particulate concentrations. Critical neurological and lung risk.

Good (0-54)

Low levels of dust and coarse particles. Environment is safe.

Moderate (55-154)

Coarse particles may trigger coughing in sensitive groups.

Sensitive (155-254)

Visible dust pollution. Sensitive groups should avoid heavy labor.

Unhealthy (255-354)

Widespread respiratory impacts likely for the population.

Very Unhealthy (355-424)

Dangerous dust and debris levels. Significant warnings issued.

Hazardous (425+)

Extremely high concentrations. Stay inside with filtration.

Good (0-54)

Surface ozone levels are within a safe, natural range.

Moderate (55-70)

Acceptable air, but sensitive individuals may feel chest tightness.

Sensitive (71-85)

Rising ozone can trigger airway inflammation in active children.

Unhealthy (86-105)

Avoid heavy outdoor work during the hottest part of the day.

Very Unhealthy (106-200)

Serious lung function reduction likely across the public.

Hazardous (201+)

Emergency ozone levels. Risk of permanent lung tissue damage.

Good (0-53)

Nitrogen levels are optimal. Safe for everyone.

Moderate (54-100)

Typical background levels for high-density urban areas.

Sensitive (101-360)

Increased risk of respiratory infections for vulnerable groups.

Unhealthy (361-649)

Significant airway inflammation likely near traffic zones.

Very Unhealthy (650-1249)

Acute respiratory distress potential. High-risk groups stay indoors.

Hazardous (1250+)

Toxic concentrations. Immediate health precautions required.

Good (0-4.4)

Carbon Monoxide levels are clean and non-toxic.

Moderate (4.5-9.4)

Acceptable; may affect those with specific heart conditions.

Sensitive (9.5-12.4)

Reduced oxygen delivery to the heart may occur.

Unhealthy (12.5-15.4)

Headaches and fatigue may occur in urban canyons.

Very Unhealthy (15.5-30.4)

Significant cardiovascular distress. Mental confusion possible.

Hazardous (30.5+)

Lethal potential. Immediate risk of neurological collapse.

Good (0-35)

Optimal air quality with no sulfur detection.

Moderate (36-75)

Acceptable air; minor odors possible near industry.

Sensitive (76-185)

Bronchoconstriction possible for active asthmatics.

Unhealthy (186-304)

Respiratory distress likely for the wider population.

Very Unhealthy (305-604)

Significant wheezing and shortness of breath likely.

Hazardous (605+)

Extreme respiratory danger. Significant life risk.

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

How is this AQI calculated?

The primary Air Quality Index (AQI) shown above is calculated using the US EPA Linear Interpolation formula based on PM2.5 concentration (Fine Particulate Matter).

Formula: Ip = [(Ihi - Ilow) / (Chi - Clow)] * (Cp - Clow) + Ilow

Note: While several pollutants (O3, NO2, SO2) are monitored, PM2.5 is used as the primary "driver" for the main index value as it typically represents the highest health risk.

Frequently Asked Questions

What is the main cause of air pollution in Keelung?

Pollution in Keelung is primarily driven by 3.6 km/h ESE winds, local traffic emissions, and industrial activity, which influence the current PM2.5 concentration of 37.5 ยตg/mยณ.

Is the AQI in Keelung safe today?

Today's AQI is 106, which is categorized as Moderate. This means the air quality is moderate for the general population.