The US Environmental Protection Agency implements the stratospheric ozone protection program. For questions on freon, chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) or other refrigerants, e-mail spdcomment@epa.gov. If phone assistance is desired, ask for a call-back in the e-mail.  To file a complaint on refrigerant handling, type in “epa.gov/tips” in your browser or go to https://echo.epa.gov/report-environmental-violations.