Raw Water Regulations, Impurities and Pretreatment System Monitoring
By William V. Collentro
The United States Pharmacopeia (USP) Official Monograph for Bulk Compendial Waters states that the raw feedwater must meet federal regulations for ﾓDrinking Waterﾔ (1). In the United States, the regulations are presented in the Environmental Protection Agencyﾒs National Primary Drinking Water Regulation (NPDWR). The criteria set forth in the NPDWR are similar to those stated in drinking water standards by the World Health Organization. The number of regulated contaminants in the NPDWR is extensive. The ability to verify compliance with the NPDWR is often limited by available data from municipalities and ﾓself monitoringﾔ for private ground water or surface water. Further, an understanding of regulated items in drinking water may be used to provide responsive pretreatment system design, operation, maintenance, and monitoring.
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