Environmental Review & Case Study: Evaluating the Significance of Certain Pharmaceuticals and Emerging Pathogens in Raw Water Supplies

Abstract

Pharmaceuticals and personal care products (PPCPs) are environmental contaminants introduced by the activities of man. PPCPs are not new or emerging from the perspective of knowing about them, but they are of growing interest due to reports in the popular media on occurrence and environmental impacts. As a result, PPCPs may be deemed as emerging issues by the public and utilities. Likewise, the biological constituents are not new—but, for reasons that are unclear, certain ones appear to pose a greater risk to consumers today than they have in the past. Similarly, Cryptosporidium parvum did not appear to pose a risk until 400,000 people became ill, and approximately 100 people died of cryptosporidiosis in Milwaukee's water service area in 1993. Today, regulators and public health scientists are trying to identify microbes that pose a similar risk in the future. If these constituents occur in raw water supplies, they may need monitoring and treatment prior to these waters entering the potable water distribution system. The Contaminant Candidate List (CCL) developed by United States Environmental Protection Agency outlines a series of biological contaminants of concern that are not currently regulated but may pose a threat. Should these contaminants move from the CCL to a regulatory framework, water supply utilities will incur added monitoring and testing of their water supply sources, and potentially added monitoring and treatment costs in their operations.