Cryptosporidium and Giardia are microscopic protozoan parasites found in surface waters of rivers and lakes used for drinking water supplies. These parasites are shed in either oocyst form (Cryptosporidium) or cyst form (Giardia) in feces causing medical conditions of Cryptosporidiosis / Giardiasis.
Pharmaceutical compounds in effluent waste streams and drinking water are a cause for concern as many pharmaceutical compounds are resistant to typical waste water treatment practices. Pharmaceutical compounds have been detected in some treated drinking water proving that conventional treatment at water treatment facilities does not completely remove the drug residue.
Current safeguards for drinking water established by the United States Environmental Protection Agency (USEPA) affirm the agency's responsibility and commitment to all Americans to continue to build the trust citizens must have whenever they turn on their water faucets.