National ambient air quality standard. Standards set by the U.S. Environmental Protection Agency for six principal pollutants considered to be harmful to public health and the environment.
national ambient air quality standards. Standards established by EPA that apply for outside air throughout the country.
National Ambient Air Quality Standards. Compare? Maximum air pollutant standards that EPA set under the Clean Air Act for attainment by each state. The standards were to be achieved by 1975, along with state implementation plans to control industrial sources in each state.
National Ambient Air Quality Standards. Standards established by EPA to protect human health and the environment from criteria pollutants, which apply for outside air throughout the nation.
National Ambient Air Quality Standards. Maximum allowable concentrations of pollutants which represent goals for desirable air quality for human health (primary standards) and agricultural, production, and aesthetic purposes (secondary standards). EPA sets these standards for each criteria pollutant.
National Ambient Air Quality Standards. A legal limit on the level of atmospheric contamination. The level is established as the concentration limits needed to protect all of the public against adverse effects on public health and welfare, with an adequate safety margin. Primary standards are those related to health effects. Secondary standards are designed to protect the public welfare from effects such as visibility reduction, soiling, material damage and nuisances.
NATIONAL AMBIENT AIR QUALITY STANDAR. The US outdoor air quality standard designed to protect public health. Pollutants covered by the NAAQS include ozone, sulfur dioxide, lead, nitrogen dioxide, respirable particulates, and carbon monoxide.
National Ambient Air Quality Standards. Standards established by the EPA that apply to outdoor air throughout the country.
Acronym for ational mbient ir uality tandards
National Ambient Air Quality Standards. Maximum allowable concentrations of pollutants that EPA may reasonably anticipate pose a danger to public health or welfare. When violated, the standards cause an area to be designated a nonattainment area.
National Ambient Air Quality Standards. National standards set by the Environmental Protection Agency under authority of the Clean Air Act; NAAQS define the maximum allowable concentrations of specified air pollutants in outdoor (ambient) air. NAAQS have been set for carbon monoxide, particulate matter, sulfur oxides, nitrogen dioxide, lead, and ozone. "Primary" NAAQS protect human health, with a margin of safety; "secondary" NAAQS protect human welfare, which includes effects on soils, water, crops, vegetation, materials, etc.
National Ambient Air Quality Standards. Federal standards that set allowable concentrations and exposure limits for various pollutants.
National Ambient Air Quality Standards. A level of air quality set by the EPA intended to protect human health and public welfare. Standards have been set for six "criteria" pollutants: carbon monoxide, lead, nitrogen dioxide, particulate matter, ozone, and sulfur oxides.
National Ambient Air Quality Standards (CAA)
National Ambient Air Quality Standards. Standards that EPA sets under the Clean Air Act to protect public health with an adequate margin of safety (primary standards) and to protect the environment (secondary standards). These standards apply to sources that emit pollutants into the atmosphere. Also see "Clean Air Act."
National Ambient Air Quality Standards: Primary standards set limits to protect public health, including the health of "sensitive" populations such as asthmatics, children, and the elderly. Secondary standards set limits to protect public welfare, including protection against decreased visibility, damage to animals, crops, vegetation, and buildings.
National Ambient Air Quality Standards. Standards set by the U.S. Environmental Protection Agency, under the auspices of the Clean Air Act, for six pollutants — ozone, carbon monoxide, total suspended particulates, sulfur dioxide, lead, and nitrogen oxides — that apply to outdoor air throughout the country.
National Ambient Air Quality Standards. Minimum standards set by EPA developed for criteria air pollutants that must be met everywhere in the country.
National Ambient Air Quality Standards. Ambient air standards set by the EPA for designated pollutants, and achieved through State Implementation Plans (SIPs).
National Ambient Air Quality Standards. An EPA-promulgated air quality standard that defines the levels of a pollutant in weight per volume that should not be exceeded under ambient conditions.
National Ambient Air Quality Standards (Maximum allowable concentrations of criteria air pollutants emitted from stationary or mobile sources into the outside air.)
National Ambient Air Quality Standards. Ambient standards for criteria air pollutants specifically regulated under the CAAA. These pollutants include ozone,CO,NO2, lead, particulate matter and SOx.
National Ambient Air Quality Standards. Levels of pollutants that cannot be exceeded. These levels are prescribed by law or regulation for outside air. Nitrogen Dioxide (NO2) The result of nitric oxide combing with oxygen in the atmosphere. It is a major component of ozone.
National Ambient Air Quality Standards; air quality standards set by the Environmental Protection Agency (EPA). The National Ambient Air Quality Standard for lead is 1.5 µg/m3 of air (averaged over a three-month period).
National Ambient Air Quality Standard; federal standards specifying the maximum allowable levels (averaged over specific time periods) for regulated pollutants in ambient (outdoor) air.
National Ambient Air Quality Standards. The allowable concentrations of air pollutants in the air specified by the Federal government. The air quality standards are divided into primary standards (based on the air quality criteria and allowing an adequate margin of safety and requisite to protect the public health) and secondary standards (based on the air quality criteria and allowing an adequate margin of safety and requisite to protect the public welfare from any unknown or expected adverse effects of air pollutants).
National Ambient Air Quality Standards. Standards set by the federal EPA for the maximum levels of air pollutants which can exist in the outdoor air without unacceptable effects on human health or the public welfare.
National Ambient Air Quality Standards: Federal standards developed by the Environmental Protection Agency (EPA) that set allowable concentration for various pollutants including carbon monoxide, transportation hydrocarbons, nitrogen oxides, and particulate matter.
National Ambient Air Quality Standards. Standards for maximum allowable concentration of seven air pollutants in ambient air set by US Environmental Protection Agency to protect public health with an adequate margin of safety (primary standards) and to protect the environment (secondary standards). The seven pollutants are ozone, nitrogen oxides (NOx), sulfur dioxide (SO2), particulate matter (PM), fine particulate matter (PM 2.5), carbon monoxide (CO), and lead.
National ambient air quality standards. Ambient standards developed by EPA that must be attained and maintained to protect public health. "Secondary" NAAQS are necessary to protect the public welfare. NAAQS exist for particular matter, sulfur dioxide, nitrogen dioxide, ozone, carbon dioxide, and lead.
National Ambient Air Quality Standard (see Appendix A)
National Ambient Air Quality Standards; There are two types of NAAQS: primary and secondary.
National Ambient Air Quality Standards. health-based pollutant concentration limits established by EPA that apply to outside air (see Criteria Pollutants)
National Ambient Air Quality Standards. Ambient standards for six pollutants including ozone, carbon monoxide, nitrogen dioxide, lead, particulate matter, and oxides of sulfur specifically regulated under the U.S. Clean Air Act of 1990. Urban areas are required to achieve attainment in regards to ambient concentrations of these criteria pollutants.
ational mbient ir uality tandard; federal standards specifying the maximum allowable levels (averaged over specific time periods) for regulated pollutants in ambient (outdoor) air.