Pollution levels

In order to easily communicate air pollution levels, governments and academics use an indicator referred to as an air quality index (AQI). The more polluted the air, the higher the number, the greater the share of the population that is likely to feel negative effects from pollution—be they short-term or long-term health impacts.

Flow uses Plume AQI pollution categories to give you an immediate overview of what you are breathing, just as temperature might give you a first indication of the weather outside.

Each of the categories of the Plume AQI indicates something specific about the length of time that you can be exposed to such pollutant rates without an adverse impact on your health, so it ensures that you can get actionable information to take real steps towards improving your wellbeing.

0-20 Low Pollution

The air is clear—perfect for outdoor activities! Pollution levels are under the recommended exposure thresholds set by the World Health Organisation (WHO) for one year of pollution exposure. Nothing to worry about if your lights are green!

21-50 Moderate Pollution

Air quality is considered acceptable, though over the recommended WHO threshold for one year. This means that, unless you have these kinds of conditions all year round, you shouldn’t be experiencing adverse health effects. However, there may be certain health concerns for people with specific sensitivities. Always consult your physician!

51-100 High Pollution

The air is highly polluted—above twenty-four hour exposure recommendations from the World Health Organisation. Everyone may start to feel adverse health effects, and those with sensitivities should take care when performing outdoor activities.

101+ Very High Pollution and above

Everyone may start to experience more serious health effects at these levels, and long term exposure constitutes a real health risk. Levels have exceeded the recommended WHO exposure threshold for one hour.

In certain regions, or during exceptional pollution peaks, you may experience higher levels of pollution over 200 or even 300. These warnings constitute emergency conditions. There can be harmful impacts on the general public, even in the case of short-term exposure. All individuals should avoid physical activities until pollution subsides, regardless of sensitivities.