Chloroacetones in pulp mill chlorination-stage effluents

Ninety-six h LC50 values for 1,1,3-trichloro-, 1,1,3,3-tetrachloro-, pentachloro- and hexachloroacetone for juvenile rainbow trout (Salmo gairdneri) were 2.3, 11.0, 25.0 and >25 mg/L, respectively. Levels in chlorination-stage effluents from eight pulp mills sampled across Canada were as follows: trichloro