Nitrogen Dioxide
NO2 · Measured in ppb
About NO2
A reddish-brown gas with a sharp odor, primarily from burning fuel. A key indicator of traffic-related air pollution. Contributes to smog and acid rain formation.
Sources
Cars, trucks, buses, power plants, off-road equipment, diesel generators
Health Effects
Airway inflammation, worsened cough and wheezing, reduced lung function, increased asthma attacks
EPA Standards
| Annual Standard | 53 ppb |
| 24-Hour (Daily) Standard | 100 ppb |
Frequently Asked Questions
What is Nitrogen Dioxide?
A reddish-brown gas with a sharp odor, primarily from burning fuel. A key indicator of traffic-related air pollution. Contributes to smog and acid rain formation.
Where does NO2 come from?
The main sources of Nitrogen Dioxide include: Cars, trucks, buses, power plants, off-road equipment, diesel generators.
What are the health effects of NO2?
Exposure to Nitrogen Dioxide can cause: Airway inflammation, worsened cough and wheezing, reduced lung function, increased asthma attacks.
What is the EPA standard for NO2?
The EPA has set an annual standard of 53 ppb and a 24-hour (daily) standard of 100 ppb for Nitrogen Dioxide.