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Posts Tagged ‘air pollution’

Philly Air Quality Warning

Tuesday, December 8th, 2015

PHILADELPHIA — It is rare to have an air quality alert in the winter; however, Philly has experienced four hazardous air days in a row. Normally air quality alert days are caused by ozone. These air quality alert days are caused by “particle concentrations”.

View the current air quality for Philadelphia.

Forecast Discussion: Tuesday is an Air Quality Action day for the Philadelphia metropolitan area for Unhealthy for Sensitive Groups (USG) or Code Orange particles. An unprecedented air quality event unfolded across the Delaware Valley beginning Saturday night and has continued into Monday. A very strong area of high pressure has created strong surface inversions that have trapped pollutants, allowing particle concentrations to reach the USG range on Sunday and continue into Monday. Typically these types of strong inversions do not develop until later in the winter, when there is snow on the ground. For Tuesday, another strong morning inversion is expected, and very light winds will become calm in the afternoon, which will continue to limit atmospheric mixing. This stagnation will allow USG particle concentrations to extend into Tuesday. **Extended Forecast: By Wednesday afternoon, surface winds will pick up, which should return particles to the upper Moderate range. But on Thursday, a warming trend combined with another episode of stagnating winds may push particles back into the USG range.

More on the health risks of air pollution.

Death By Ozone

More on global warming and climate change.

Philadelphia Air Pollution

Tuesday, June 11th, 2013
Toxic Released in the Philadelphia Area

Toxic Released in the Philadelphia Area

About this map
To begin exploring how air pollution may affect your community, use this interactive map of more than 17,000 facilities that have emitted hazardous chemicals into the air. Color-coded dots and scores of one to five smoke stacks are based on an EPA method of assessing potential health risk in airborne toxins from a given facility. More smoke stack icons signify higher potential risks to human health.

From NPR Toxic Air

Pennsylvania Air Quality Partnership

Tuesday, January 1st, 2013

The goals of the Air Quality Partnership are to increase the public’s understanding on the impact of air pollution, provide alerts for days with high air pollution, provide health effects information and guidelines to prevent or reduce exposure, and finally encourage voluntary actions to reduce air pollution emissions, especially on “Action Days”.

The Partnership forecasts “Action Days,” or days when the air is expected to be unhealthy to breathe. Using a color-coded scale, the forecast informs people about the predicted ozone and fine particulate matter (PM2.5) levels and any precautions that need to be taken.

Ozone in the stratospheric ozone layer protects us from the sun’s harmful rays. But at ground-level, where we breathe it, it’s not so good for us. In the summer, sunlight and high temperatures ‘bake’ pollutants emitted by motor vehicles, power plants, industrial manufacturing and other sources to form high levels of ground-level ozone, commonly known as smog.

Particle pollution is the term for tiny drops of liquid or small particles of dust, metals and other material that float in the air. Some particles are large or dark enough to be seen as soot or smoke. Others are so small that they can only be detected with an electron microscope. Particle pollution comes from a variety of sources such as cars, power plants, factories, construction sites, forest fires, and municipal waste incinerators.