The burden of water quality enhancement should be a shared responsibility among all discharges and downstream users of these irreplaceable resources. Much can be accomplished through the application of a multiple barrier approach in wastewater treatment, controlled stormwater releases and water supply enhancement. Dischargers must seek to minimize pathogen releases, reduce particulate dispersion and diminish organics in effluents. These factors impact heavily on wastewater disinfection effectiveness. Furthermore, with passage downstream to the water intake, these organic residuals may be the precursors of disinfection byproducts created during drinking water treatment. Some water supply operations must revise their treatment practices to provide better protection from protozoan cyst passage and enhance the removal of organics before applying disinfection. Disinfection of water supply is critical and will only be consistently effective in a clean processed water.

EPA 600/D-89/104. June 2, 1989." Microfiche.