Particulate in the United States

Particulate in Environmental Law

A substance, either liquid or solid, that is small enough to be suspended in air. Particulates may be tiny enough to be invisible, or they may compare to soot in size. Those larger than 10 microns in diameter tend to be filtered out by the respiratory system when we breathe. Some are caught by the hairs within the nostrils; others get stopped before they get to the lungs. But the Environmental Protection Agency (EPA) has concluded that particulates 10 microns or less in diameter can be inhaled into the lungs. These particulates, called PM10, are one of the air contaminants regulated by the National Ambient Air Quality Standards.

Most particulate matter in the air is the result of incomplete combustion of fossil fuels, primarily from automobiles and power plants. Power plants and automobiles reduce the amount of particulates in their emissions by using several different technologies. See mobile sources; nonattainment areas.
Based on “Environment and the Law. A Dictionary”.

Particulate: Open and Free Legal Research of US Law

Federal Primary Materials

The U.S. federal government system consists of executive, legislative, and judicial branches, each of which creates information that can be the subject of legal research about Particulate. This part provides references, in relation to Particulate, to the legislative process, the federal judiciary, and the primary sources of federal law (cases, statutes, and regulations).

Federal primary materials about Particulate by content types:

Laws and Regulations

US Constitution
Federal Statutory Codes and Legislation

Federal Case Law and Court Materials

U.S. Courts of Appeals
United States courts of appeals, inclouding bankruptcy courts and bankcruptcy appellate panels:

Federal Administrative Materials and Resources

Presidential Materials

Materials that emanate from the President’s lawmaking function include executive orders for officers in departments and agencies and proclamations for announcing ceremonial or commemorative policies. Presidential materials available include:

Executive Materials

Federal Legislative History Materials

Legislative history traces the legislative process of a particular bill (about Particulate and other subjects) for the main purpose of determining the legislators’ intent behind the enactment of a law to explain or clarify ambiguities in the language or the perceived meaning of that law (about Particulate or other topics), or locating the current status of a bill and monitoring its progress.

State Administrative Materials and Resources

State regulations are rules and procedures promulgated by state agencies (which may apply to Particulate and other topics); they are a binding source of law. In addition to promulgating regulations, state administrative boards and agencies often have judicial or quasi-judicial authority and may issue administrative decisions affecting Particulate. Finding these decisions can be challenging. In many cases, researchers about Particulate should check state agency web sites for their regulations, decisions, forms, and other information of interest.

State rules and regulations are found in codes of regulations and administrative codes (official compilation of all rules and regulations, organized by subject matter). Search here:

State opinions of the Attorney General (official written advisory opinions on issues of state law related to Particulate when formerly requested by a designated government officer):

Tools and Forms

Law in Other Regions

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