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Only state which still conduct emission testing dating back to the 1967 model year unlike other states using EPA classification (a few still conduct test for 1968–present (1968+ testing is for jurisdictions using defined EPA standards for vehicle classification since the '68 model year and beyond automobiles must have an exhaust emission ...
Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.
The Illinois EPA was established in July 1970, shortly after the first Earth Day. Governor Richard Ogilvie signed into law the Illinois Environmental Protection Act (PA 76-2429), which became effective on July 1, 1970, and created the Illinois EPA. Illinois was the first US state with a comprehensive environmental protection act.
The EPA Federal Test Procedure, commonly known as FTP-75 for the city driving cycle, are a series of tests defined by the US Environmental Protection Agency (EPA) to measure tailpipe emissions and fuel economy of passenger cars (excluding light trucks and heavy-duty vehicles).
Basically, the HDIUT is an industry agreed to manufacturer run, in-use, on-road testing program. It builds upon the original NTE standard. It is designed to focus on compliance in the real world, and relies on emissions testing, utilizing Portable Emissions Measurement Systems (PEMS) with NOx, HC, CO and PM being the pollutants to be measured. [11]
The N.C. Division of Air Quality will ask the U.S. EPA to approve a plan to end annual emissions inspections in 18 of the 19 counties where it is still required.
Dieselnet pages on vehicle emission standards. EPA National Vehicle and Fuel Emissions Laboratory. "Emission Standards Reference Guide" (PDF). 19 August 2015. (141 KB) for heavy duty and nonroad engines. Federal Income Tax Credits for Hybrids placed in service. EPA: History of Reducing Air Pollution from Transportation in the United States; EU
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