Anthropogenic emissions of trichloromethane (CHCl3, chloroform) in 1990 have been estimated with a variety of methods specific to the source category. The largest source category for CHCl3 was found to be pulp and paper manufacturing, responsible for an estimated 30¿8 Gg yr-1 reactive chlorine in the form of CHCl3. Water treatment of various types was estimated to contribute another 19¿12 Gg. Manufacturing facilities of products other than pulp or paper and other relatively minor sources were estimated to emit an additional 13¿5 Gg yr-1, for a total of 62¿25 Gg yr-1 reactive chlorine in the form of CHCl3. The global flux of chlorodifluoromethane (HCFC-22) is well characterized from industrial and regulatory data to have been 195 Gg in 1990, equivalent to 80¿0.6 Gg yr-1 as active chlorine. The fluxes of reactive chlorine from CHCl3 and HCFC-22, distributed globally in a 1¿ latitude times 1¿ longitude grid, revealed areas highest in emissions. ¿ 1999 American Geophysical Union