Aqi scale

What is AQI level mean? How do you measure air quality indoors? Ozone (O 3) AQI scale. Nitrogen Dioxide (NO 2) scale. AQI values below 1are generally thought of as satisfactory.

It is a health protection tool used to make decisions to reduce short-term exposure to air pollution by adjusting activity levels during increased levels of air pollution. Air quality index ( AQI ) is a numerical scale used for reporting day to day air quality with regard to human health and the environment. The daily of the index are used to convey to the public an estimate of air pollution level. People who are unusually sensitive to ozone or particle pollution may experience respiratory symptoms. The AQI is between and 100.

Unhealthy for Sensitive Groups. EPA has an AQI scale from to 500. AQI depends other major air pollutants as well such as PM1 PM2. It assigns numbers on a scale between and 5and is used to help determine when air quality is expected to be unhealthy.

The higher the AQI value, the greater the health concern. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. EPA Home Air Quality System Code Tables AQI Breakpoints. JavaScript must be enabled to view this page.

AIR QUALITY INDEX meaning - Duration: 3:34. AQI refers to the Air Quality Index. An AQI of 1is equivalent to the National Ambient Air Quality Standard (NAAQS).

An AQI greater than 1is considered to be above the national standard or NAAQS. An AQI Calculation Table is available online to convert raw ozone concentrations to the Air Quality Index. AQI Mechanics An individual score is assigned to the level of each pollutant and the final AQI is the highest of those scores.

The pollutants can be measured quite differently. SO NO and PM concentration are measured as average per day. The final AQI value is calculated per day.

The most common measurements are PM 2. PM 1 measured in micrograms per cubic meter. Those particles are found in vehicle and motor exhausts,. Environmental Protection Agency (EPA) has provided a scale called the Air Quality Index ( AQI ) for rating air quality.

This scale is based on the National Ambient Air Quality Standards (NAAQS). Different countries use different indices for measuring air quality by monitoring some or all of the following pollutants: carbon monoxide, PM 2. The index AQI converts ozone concentrations to a number on a scale from to 500. When the AQI level (air quality index) is below 5 people are breathing fresh, clean air. People are no longer exposed to any health risk because the quality of air is pure. Be highly active outside and spend more time.

Breathe as much fresh air as you can. Fashionably masked women on Saturday outside an amusement park in Beijing. The World Health Organization has standards that judge an air-quality score above 5to be more than times the level of particulate matter in the air deemed safe.