Why is so2 a criteria pollutant?
Why is so2 a criteria pollutant?
SOx can react with other compounds in the atmosphere to form small particles. These particles contribute to particulate matter (PM) pollution. Small particles may penetrate deeply into the lungs and in sufficient quantity can contribute to health problems.
What criteria did the Naaqs include?
7401 et seq.), NAAQS is applied for outdoor air throughout the country. The six criteria air pollutants (CAP), or criteria pollutants, for which limits are set in the NAAQS are ozone (O3), atmospheric particulate matter, lead, carbon monoxide (CO), sulfur oxides (SOx), and nitrogen oxides (NOx).
What is a criteria air pollutant?
The criteria air pollutants include particle pollution, ground-level ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, and lead. These pollutants can harm your health and the environment, and cause property damage.
What is the EPA standard limit of sulfur dioxide?
75 parts per billion
Rule Summary The existing standard, established in 2010, is 75 parts per billion based on the 3-year average of the 99th percentile of the yearly distribution of 1-hour daily maximum concentrations.
Is SO2 a secondary pollutant?
Like nitrogen dioxide, sulfur dioxide can create secondary pollutants once released into the air. Secondary pollutants formed with sulfur dioxide include sulfate aerosols, particulate matter, and acid rain.
What causes high SO2 emissions?
The main sources of SO2 emissions are from fossil fuel combustion at power plants, refineries, and other industrial facilities. Secondary sources of SO2 emissions include ore smelters and the burning of high sulfur fuel by trains, large ships, and non-road equipment.
What are the 6 criteria pollutants?
EPA has established national ambient air quality standards (NAAQS) for six of the most common air pollutants— carbon monoxide, lead, ground-level ozone, particulate matter, nitrogen dioxide, and sulfur dioxide—known as “criteria” air pollutants (or simply “criteria pollutants”).
What are and list the 6 criteria pollutants?
Why are the NAAQS called criteria pollutants?
EPA calls these pollutants “criteria” air pollutants because it sets NAAQS for them based on the criteria, which are characterizations of the latest scientific information regarding their effects on health or welfare.
What is sulfur dioxide EPA?
The Clean Air Act identifies six common air pollutants that are found all over the United States. These pollutants can injure health, harm the environment and cause property damage. Sulfur dioxide is a criteria pollutant. EPA establishes national ambient air quality standards for each of the criteria pollutants.
What is the limit of SO2 parameters in ambient air quality?
National Ambient Air Quality Standards
| Pollutants | Time weighted average | Concentration in ambient air |
|---|---|---|
| Industrial Area | ||
| Sulphur Dioxide(SO2) | Annual Average* | 80 µg/m3 |
| 24 hours**** | 120 µg/m3 | |
| Oxides of Nitrogen as NO2 | Annual Average* | 80 µg/m3 |
What are the NAAQS criteria air pollutants?
NAAQS are currently set for carbon monoxide, lead, ground-level ozone, nitrogen dioxide, particulate matter, and sulfur dioxide. criteria air pollutants These pollutants are particulate matter, photochemical oxidants (including ozone), carbon monoxide, sulfur oxides, nitrogen oxides and lead.
What are the NAAQS standards for sulfur dioxide?
Sulfur Dioxide (SO2) Primary Air Quality Standards The Clean Air Act requires EPA to set national ambient air quality standards (NAAQS) for sulfur dioxide and five other pollutants considered harmful to public health and the environment (the other pollutants are ozone, particulate matter, nitrogen dioxide, carbon monoxide, and lead).
What are the six criteria pollutants?
The six criteria pollutants are carbon monoxide, ground-level ozone, lead, nitrogen dioxide, particulate matter, and sulfur dioxide.
What are the primary and secondary standards of NAAQS?
NAAQS Table. Primary standards provide public health protection, including protecting the health of “sensitive” populations such as asthmatics, children, and the elderly. Secondary standards provide public welfare protection, including protection against decreased visibility and damage to animals, crops, vegetation, and buildings.
