The U.S. Environmental Pro­­­­tection Agency (EPA) has re­­leased new guidelines to help all livestock farms decide whether to report air emissions. The requirements are slated to take effect Nov. 15 unless an appeals court grants an extension.

The EPA prepared the new guidance in response to an April 2017 decision by the D.C. Circuit Court of Appeals, which struck down a 2009 exemption from the air emissions reporting requirements.

Under the new guidelines, farmers must now report the release of air emissions to federal emergency responders when...