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.

Freedom of Information Act (FOIA)

NGAAMI Executive Summary

This document describes the analysis of air monitoring and other data collected from a late summer though fall of 2012 under EPA’s initiative Natural Gas Ambient Air Monitoring Initiative (NGAAMI) to assess potentially elevated levels of air toxics and PM2.5 concentrations around natural gas extraction facilities.

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