AWWA WQTC52969

Over the past five years, the Philadelphia Water Department has expended significantresources to better understand the challenges that Cryptosporidium poses to its customers. These efforts have included the following:routine influent and effluent monitoring for all of its water treatment plants to determine baselineoccurrence and levels in the water supply; special watershed-wide and storm event monitoring studies to better understand the sources, fate and transport, and influencing factors on raw water levels; studies of removal andamounts in wastewater discharge; various studies to determine the potential removal of protozoa by water treatment; epidemiological monitoring of endemic cryptosporidiosis in the community and communication plans with local and state health agencies; and investigations of swimming pool exposure. This paper discusses the results of these studies. Includes table, figures.