EPA Indoor Environments Division A Year of Indoor Air Quality! EPA Indoor Environments Division sent this bulletin at 12/03/2018 11:00 AM EST Having trouble viewing this email? View it as a Web page. A Year of Indoor Air Quality As 2018 draws to a close, EPA's Indoor Environments Division reminds you to care for the quality of your indoor air. Use the images below to explore the topics and observances emphasized during the year.