This gas forms when chlorine, which is used to disinfect public water supplies, mixes with organic matter in the water.
(chlorine; is used; to disinfect public water supplies) (chlorine, which is used to disinfect public water supplies; mixes; with organic matter; L:in the water) Context(chlorine , which is used to disinfect public water supplies mixes,List([20, 85))):(chlorine; to disinfect; public water supplies)
chlorine , which is used to disinfect public water supplies mixes,List([20, 85))
chlorine chlorine, which is used to disinfect public water supplies chlorine
is used mixes to disinfect
to disinfect public water supplies
with organic matter L:in the water
public water supplies