Surface water can be contaminated via direct and indirect emissions. Chemical spills and point pollution in rivers and other freshwater bodies have repeatedly threatened drinking water supplies worldwide. California's largest chemical spill - 1991's Cantara spill - dumped 19,000 gallons of a soil sterilizer into the Sacramento River. In 2012, a cadmium spill in Guangxi Province in China contaminated the Longjiang River which provides freshwater for the 3.7 million residents of Liuzhou. Most recently, December 2013 spill of 9 tons of aniline into a river in Shanxi Province that was only made public this January has infuriated the public.