What are the 6 outdoor air pollutants for which the EPA sets limits?
What are the 6 outdoor air pollutants for which the EPA sets limits?
Six Criteria Air Pollutants: Carbon Monoxide, Ground-level Ozone, Lead, Nitrogen Oxides, Particulate Matter, and Sulfur Dioxide. The Clean Air Act (CAA) requires EPA to set National Ambient Air Quality Standards (NAAQS) for six common air pollutants.
What is the WHO air pollution limit?
It also tightened the limits for gaseous air pollutants like nitrogen dioxide that are produced when fossil fuels are burned by vehicles and power plants. The WHO now recommends limiting nitrogen dioxide to one-quarter of the previous level, from 40 to 10 micrograms per cubic meter.
What are the 6 air pollutants the EPA has set standards for?
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 the standards of pollution limits?
Ambient Air Quality Standards in India
| Pollutant | Time Weighted Average | Concentration in Ambient Air |
|---|---|---|
| Particulate Matter (size less than 2.5 µm) or PM2.5 µg/m3 | Annual* 24 hours** | 40 60 |
| Ozone (O3) µg/m3 | 8 hours* 1 hour** | 100 180 |
| Lead (Pb) µg/m3 | Annual* 24 hours** | 0.50 1.0 |
| Carbon Monoxide (CO) mg/m3 | 8 hours* 1 hour** | 02 04 |
How does the EPA enforce the Clean Air Act?
EPA conducts targeted and random inspections to evaluate compliance with these standards, and brings enforcement actions against parties that violate these standards to reduce harmful emissions caused by fuel that does not meet the applicable standards.
Which law requires the EPA to establish air quality standards?
National Ambient Air Quality Standards (NAAQS), in the United States, allowable levels of harmful pollutants set by the Environmental Protection Agency (EPA) in accordance with the Clean Air Act (CAA).
What are the major effects of air pollution?
Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people’s nerves, brain, kidneys, liver, and other organs.
What two pollutants pose the greatest threat to human?
Ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health in this country.
What causes PM10 pollution?
Emissions from combustion of gasoline, oil, diesel fuel or wood produce much of the PM2. PM10 also includes dust from construction sites, landfills and agriculture, wildfires and brush/waste burning, industrial sources, wind-blown dust from open lands, pollen and fragments of bacteria.
Is the Clean Air Act still in effect?
The Clean Air Act “has survived, but it has been damaged because of the constant attacks,” Ali said. Particularly devastating has been the administration’s effort to undermine the law’s most important pillar, its grounding in science.