Air quality forecast

Pollutants in the air


The major sources of anthropogenic emissions of NO2 are combustion processes (heating, power generation, and engines in vehicles and ships). Epidemiological studies have shown that symptoms of bronchitis in asthmatic children increase in association with long-term exposure to NO2. Reduced lung function growth is also linked to NO2.

WHO information

Particles that are larger than 2.5 micrometers can be deposited in airways, resulting in health issues. Exposure can result in eye and throat irritation, coughing or difficulty breathing, and aggravated asthma. More frequent and excessive exposure can result in more serious health effects.

WHO information

SO2 is a colourless gas with a sharp odour that is produced from the burning of fossil fuels and the smelting of mineral ores that contain sulfur. The main anthropogenic source of SO2 is the burning of sulfur-containing fossil fuels for domestic heating, power generation and motor vehicles. It can affect the respiratory system and the functions of the lungs, and causes irritation of the eyes. Inflammation of the respiratory tract causes coughing, mucus secretion, aggravation of asthma and chronic bronchitis and makes people more prone to infections of the respiratory tract.

WHO information

Ground-level Ozone is one of the major constituents of photochemical smog. It is formed by the reaction with sunlight of pollutants such as nitrogen oxides (NOx) from vehicle and industry emissions and volatile organic compounds (VOCs) emitted by vehicles, solvents and industry. Ozone can cause breathing problems, trigger asthma, reduce lung function and cause lung diseases.

WHO information

Inhalable pollutant particles with a diameter less than 2.5 micrometers can enter the lungs and bloodstream, resulting in serious health issues. The most severe impacts are on the lungs and heart. Exposure can result in coughing or difficulty breathing, aggravated asthma, and the development of chronic respiratory disease.

WHO information

CO is a colorless and odorless gas. When inhaled at high levels can cause headache, nausea, dizziness, and vomiting. Repeated long-term exposure can lead to heart disease.

WHO information

About AQI values

Good 0−50

The air quality is good. Enjoy your usual outdoor activities.

Moderate 51−100

Air quality is acceptable, enjoy your usual outdoor activities.

Unhealthy for sensitive 101−150

Enjoy your usual outdoor activities. Consider reducing intense outdoor activities, if you experience symptoms.

Unhealthy 151−200

Consider reducing intense activities outdoors, if you experience symptoms such as sore eyes, a cough or sore throat.

Very unhealthy 201−300

Consider reducing intense activities outdoors, if you experience symptoms such as sore eyes, a cough or sore throat.

Hazardous 301−500

Reduce or avoid physical activities outdoors.

The AQI data is approximate and is based on model forecasts.
Information about the impact of pollution is based on World Health Organization data.