What is the EPA standard for ozone?
0.070 ppm
Based on extensive scientific evidence about the effects of ozone on public health and welfare, on October 1, 2015, EPA strengthened the ground-level ozone standard to 0.070 ppm, averaged over an 8-hour period.
What is the current 2015 standard US allowable level Naaqs for ozone?
75 parts per billion
On October 1, 2015, under the authority of Sections 108 and 109 of the Clean Air Act (CAA) as amended,1 the Environmental Protection Agency (EPA) finalized revisions2 to the National Ambient Air Quality Standards (NAAQS) for ground-level ozone3 from the then-current level of 75 parts per billion (ppb) to 70 ppb.
Is ozone regulated by EPA?
The Clean Air Act requires EPA to set national ambient air quality standards (NAAQS) for ozone and five other pollutants considered harmful to public health and the environment (the other pollutants are particulate matter, nitrogen oxides, carbon monoxide, sulfur dioxide and lead).
What is acceptable ozone level?
Regulatory Ozone Limits Current OSHA regulations set an eight-hour time-weighted average permissible exposure limit (PEL-TWA) of 0.1 ppm (0.2 mg/m³). These values can serve as a reference point; for occupied workspaces, indoor ozone levels should definitely be kept below 0.1 ppm.
What is the current US allowable level Naaqs for CO?
NAAQS Table
| Pollutant [links to historical tables of NAAQS reviews] | Level |
|---|---|
| Carbon Monoxide (CO) | 9 ppm |
| 35 ppm | |
| Lead (Pb) | 0.15 μg/m3 (1) |
| Nitrogen Dioxide (NO2) | 100 ppb |
What does the Naaqs do?
The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency (EPA) under authority of the Clean Air Act (42 U.S.C.
Which Act established a national air quality standard for ozone quizlet?
Pursuant to the Clean Air Act Amendments of 1990, the Northeast Ozone Transport Commission (OTC) was formed to help 12 States meet EPA’s new national ambient air quality standard (NAAQS) for ozone.
How is ozone regulated?
The Clean Air Act regulates ozone as a criteria pollutant. The U.S. EPA sets National Ambient Air Quality Standards (NAAQS) for ozone, including both primary standards to protect public health and secondary standards to protect the environment.
What is ozone AQI?
The index AQI converts ozone concentrations to a number on a scale from 0 to 500. This scale is used by cities and states across the country to report current and daily ozone concentrations and for daily ozone air quality forecasting.
At what levels is ozone harmful?
These ozone molecules form the ozone layer and are commonly referred to as “good ozone.” At concentrations as high as 12,000 ppb (the EPA considers anything over 70 ppb to be unhealthy for human health and welfare) this ozone protects and shields people, trees, crops, property, and microorganisms from the harmful …
How are NAAQS values determined?
NAAQS are selected by the U.S. EPA Administrator at the conclusion of a public process that takes about five years for completion. The process starts with a comprehensive review of the relevant scientific literature.
What is the ozone standard?
EPA ozone standard is an 8-hour average of 0.08 parts per million by volume [ppm (v)] This standard is subdivided into primary standards that protect public health and secondary standards that protect public welfare (the numeric value of the standard is the same for primary and secondary standards).
What is the EPA ozone standard?
Currently, the EPA ozone standard is 75 parts per billion or ppb (in this case we are referring to the molar ration of ozone to air), which is taken annually from the fourth-highest daily maximum 8-hr concentration averaged over 3 years.
What are the criteria for air pollution?
These commonly found air pollutants (also known as “criteria air pollutants”) are found all over the United States. The criteria air pollutants include particle pollution, ground-level ozone, carbon monoxide, sulfur dioxide, nitrogen dioxide, and lead.
What is ambient ozone monitor?
An ozone monitor is electronic equipment that monitors for ozone concentrations in the air. The instrument may be used to monitor ozone values for industrial applications or to determine the amount of ambient ozone at ground level and determine whether these values violate National Ambient Air Quality Standards (NAAQS).