On September 20 last year, the U.S. Environmental Protection Agency (EPA) announced the release of the IRIS Toxicological Review of Ammonia - Noncancer Inhalation (Final Report). The Interagency Science Discussion Draft of the Ammonia IRIS Assessment and accompanying comments were also released. The report was the culmination of almost five years of work by the EPA and a specially convened Scientific Advisory Board. September 20 also happened to be the day of the Storage and Safety Session at the 2016 NH3 Fuel Conference. This is a striking coincidence because safety is seen as a key barrier to the adoption of ammonia as a sustainable energy carrier, and the report is a substantial contribution to the literature of ammonia safety.