At the national level, chloropicrin is regulated by the United States Environmental Protection Agency as a restricted use pesticide.[1][15] Because of its toxicity and carcinogenicity, distribution and use of chloropicrin is available only to licensed professionals and specially certified growers who are trained in its proper and safe use.[8][15] In the US, occupational exposure limits have been set at 0.1 ppm over an eight-hour time-weighted average.[16]