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.

Air Emission Measurement Center (EMC)

Method 201A - PM10 and PM2.5 - Constant Sampling Rate Procedure

Do you have questions about a Test Method, Performance Specification or Source Category? Find the EMC contact for your question in the EMC Directory.

Method and FAQ

You may need Adobe Reader to view files on this page. See EPA’s About PDF page to learn more.