ambient air standard

ambient air standard

the maximum tolerable concentration of any outdoor air pollutant as set by the Environmental Protection Agency (EPA) to protect public health and the environment. The EPA considers lead, the nitrogen oxides, particulate matter, sulfur dioxide, carbon monoxide, and ozone "criteria" pollutants. Research and medical evidence show a strong correlation between many diseases and toxic chemicals, but little is known about the precise effects and movement of airborne pollutants.
References in periodicals archive ?
When scientists are trying to assess whether volatile pollutant levels in soil are safe, the levels are compared against the ambient air standard.
Our premiere panel of experts will engage registrants in a robust discussion of the most significant topics including Ozone, interstate transport and other ambient air standards issues and implementation; EPA's clean power plan and other greenhouse gas developments; and Title II: Motor vehicles, engines, aircraft, fuels and renewables.
As such, the pollutants should be listed by EPA as criteria pollutants, and ambient air standards should be issued for them, the complaint said.
First, Ottinger refers to various ambient air standards and the fact that there is "no consensus on what constitute [s] a safe or permissible level.
Ironically, about 127 million Americans still live in counties where air pollution levels exceed one or more of the six National Ambient Air Standards (NAAQS), and politicians still debate whether the health-based regulation of air quality is hurting the economy and stymieing job growth despite evidence to the contrary.
The company also monitors in parts per million, while more protective provisions set for ambient air standards in Louisiana are in parts per billion.
In political terms, cleaner ambient air standards are particularly important to regions like Southern California.
Hardest hit will be those who are currently not in compliance with ambient air standards for ozone levels.
These emissions could impact population centers in the Northeast that already fail to meet ambient air standards.