Research Haloacetic Acids in Canadian Lake Waters and Precipitation B R I A N F . S C O T T , * ,† D A V I D M A C T A V I S H , ‡ CHRISTINE SPENCER,† WILLIAM M. J. STRACHAN,† AND DEREK C. G. MUIR† National Water Research Institute, Environment Canada, P.O. Box 5050, Burlington, Ontario, L7R 4Q6, and Canadian Air and Precipitation Monitoring Network, Meteorological Services Canada, 4905 Dufferin St. Downsview, Ontario, M3H 5T4
Haloacetic acids (HAAs) were measured in lake water and precipitation in distinct geographical areas of Canada with the objective of determining prevailing levels and source regions of these phytotoxins. This included surface water samples from the Great Lakes and four lakes in widely separated geographical areas of Canada. These lakes had levels dependent on the degree of isolation from human activity, with the more isolated lakes having HAA concentration generally of
