What are the air quality categories?
Types of Air Pollutants
| Air Quality Index (AQI) Values | Levels of Health Concern | Colors |
|---|---|---|
| When the AQI is in this range: | ..air quality conditions are: | …as symbolized by this color: |
| 0-50 | Good | Green |
| 51-100 | Moderate | Yellow |
| 101-150 | Unhealthy for Sensitive Groups | Orange |
What are the 5 air quality index categories?
How does the AQI work?
| Daily AQI Color | Levels of Concern | Values of Index |
|---|---|---|
| Green | Good | 0 to 50 |
| Yellow | Moderate | 51 to 100 |
| Orange | Unhealthy for Sensitive Groups | 101 to 150 |
| Red | Unhealthy | 151 to 200 |
What do air quality numbers mean?
Numerical. Value. Meaning. Good 0 to 50 Air quality is considered satisfactory, and air pollution poses little or no risk. Moderate 51 to 100 Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
What are safe PM2 5 levels?
12 micrograms per cubic meter
In the US, exposure to very fine particulate matter known as PM2. 5 is considered safe by the US Environmental Protection Agency’s national ambient air quality standards so long as a person breathes in an average of 12 micrograms per cubic meter of air (μg/m3) or less per day over the duration of a year.
What is normal AQI?
About the Air Quality and Pollution Measurement:
| AQI | Air Pollution Level |
|---|---|
| 0 – 50 | Good |
| 51 -100 | Moderate |
| 101-150 | Unhealthy for Sensitive Groups |
| 151-200 | Unhealthy |
What is a bad AQI level?
Everyone may begin to experience health effects when AQI values are between 151 and 200. Members of sensitive groups may experience more serious health effects. Very Unhealthy. AQI values between 201 and 300 trigger a health alert, meaning everyone may experience more serious health effects.
What is normal AQI India?
India
| AQI Category (Range) | PM10 (24hr) | NO2 (24hr) |
|---|---|---|
| Good (0–50) | 0–50 | 0–40 |
| Satisfactory (51–100) | 51–100 | 41–80 |
| Moderately polluted (101–200) | 101–250 | 81–180 |
| Poor (201–300) | 251–350 | 181–280 |
What AQI is safe?
AQI values at and below 100 are generally considered to be satisfactory. When AQI values are above 100, air quality is considered to be unhealthy, at first for members of populations at greatest risk of a health effect, then for the entire population as AQI values get higher (greater than 150).