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Diesel Particulate Matter

Read more about Diesel Particulate Matter

What is diesel particulate matter?

Exhaust from trucks, buses, trains, ships, and other equipment with diesel engines contains a mixture of gases and solid particles. These solid particles are known as diesel particulate matter (diesel PM). Diesel PM contains hundreds of different chemicals. Many of these are harmful to health. The highest levels of diesel PM are near ports, rail yards and freeways. People are exposed to diesel PM from breathing air containing diesel exhaust.

Air Quality: PM2.5

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What is PM 2.5?

Particulate matter, or PM2.5, is very small particles in air that are 2.5 micrometers (about 1 ten-thousandth of an inch) or less in diameter. This is less than the thickness of a human hair. Particulate matter, one of six U.S. EPA criteria air pollutants, is a mixture that can include organic chemicals, dust, soot and metals. These particles can come from cars and trucks, factories, wood burning, and other activities.

Air Quality: Ozone

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What is ozone?

Ozone is the main ingredient of smog. At ground level, ozone is formed when pollutants chemically react in the presence of sunlight. Ground-level ozone is formed from the reaction of oxygen-containing compounds with other air pollutants in the presence of sunlight.The main sources of ozone are trucks, cars, planes, trains, factories, farms, construction,and dry cleaners.

Population Indicators

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Overall CalEnviroScreen scores are calculated from the scores for two groups of indicators: Pollution Burden and Population Characteristics.

This page shows the Population Characteristics indicators, which represent biological traits, health status, or community characteristics that can result in increased vulnerability to pollution. Click on any of the indicators below to get more information about that indicator.

Pollution Indicators

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Overall CalEnviroScreen scores are calculated from the scores for two groups of indicators: Pollution Burden and Population Characteristics.

This page shows the CalEnviroScreen Pollution Burden indicators. Pollution burden represents the potential exposures to pollutants and the adverse environmental conditions caused by pollution. Click on any one of the indicators below to get more information about that indicator.

CIPA Meeting August 7, 2012

August 7, 2012 eighth CIPA meeting

Tuesday, August 7, 2012 - 12:00pm

Read more about CIPA Meeting August 7, 2012

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