Thchnical note: prediction of illness risk near ocean outfalls using frequency distributions of bacterial concentrations

摘要

Water quality managers traditionally assess the illness risk associated with indicator bacteria in bathing waters by comparing an average concentration to a concentration standard, where the aver- age may be determined from a frequency distribution of concentrations. The United States EPA con- centration standards are determined as the concentration which gives an acceptable illness rate according to a mathematical relation between the concentration and illness rate (concentration-re- sponse relation).