An official website of the United States government.
We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.
January 2018:Proposed Test Method Update - FR Notice
Novemeber 2017:NO2 Cylinder Guidance for State-Local Agencies and Gas Producers
September 2017: Technical Amendments to Procedure 6 - Final Rule
The Air Emission Measurement Center (EMC) provides information on test methods for measuring pollutants from smokestacks and other industrial sources. This website compiles the test methods available for emission measurement. Contact EMC staff for technical assistance in the use and application of the methods.