Pollutant standards index

How does air pollution affect the world? What causes air pollution? For each pollutant , a sub-index is calculated from a segmented linear function that transforms ambient concentrations onto a scale extending from through 500. The breakpoints used in defining each of the six pollutant sub-indices are listed as follows: Index Category PSI 24-hr PM 2. A scale devised by the U. Environmental Protection Agency to provide a way for broadcasts and newspapers to report air quality on a daily basis. An air quality index ( AQI ) is used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become.

The Pollutant Standards Index , or PSI, is a type of air quality index , which is a number used to indicate the level of pollutants in air. Besides Singapore, some other countries also use air quality indexes. However, the calculations used to derive air quality indices may differ. Pollutant Standard Index (PSI ) Note: EPA no longer updates this information, but it may be useful as a reference or resource. Downloading instructions, archivers, and de-archivers are available through File Compression Utilities under the TTN Top Menu.

The AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. An air quality index (AQI) is used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become.

Public health risks increase as the AQI rises. The GAIA air quality monitoring stations are using high-tech laser particle sensors to measure in real-time PM2. Very easy to set up, they only require a WIFI access point and a USB power supply. Secondary standards provide public welfare protection, including protection against decreased visibility and damage to animals, crops, vegetation, and buildings.

The EPA has set National Ambient Air Quality Standards for six principal pollutants, which are called criteria air pollutants. Periodically, the standards are reviewed and may be revised. A key tool in this effort is the Air Quality Index , or AQI. Overall and regional PSI data (24-hr PSI, Pollutant Concentration and Sub- Index ) Data. Topics Blog Developers Data Request.

Linear Graphs The most straightforward approach is simply to plot the PSI subindex values for each pollutant on ordinary graph paper. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion. Definition of pollutant standard index (PSI): Measure that indicates the degree of pollution in a geographical-area over a given period. SO ), nitrogen dioxide (NO ), ozone (O ), and carbon monoxide (CO).

The air pollutant with the highest concentration will determine the PSI value. Health advisory is based on the 24-hour PSI readings. You are not authenticated to view the full text of this chapter or article. Elgaronline requires a subscription or purchase to access the full text of books or journals.

People who are unusually sensitive to ozone or particle pollution may experience respiratory symptoms. Unhealthy for Sensitive Groups. Emissions from cars and light-trucks account for about of the total hydrocarbons and oxides of nitrogen emission in the air that contribute to the formation of ground-level ozone or “smog” during the summer months.

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