Agenda - Parks and Recreation Commission - 04/10/2014

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candidate list. This list is also included in Appendix B1. In late 2001, USEPA hoped to decide whether to regulate, not regulate, or provide other guidance on the 20 contaminants included in regulatory determination priorities; however, as of January 2003, has not issued any statement regarding these contaminants. The other 48 contaminants are candidates for the 2003 DWCCL. Based on the published list, manganese is of interest to the Ramsey water system. Research to date indicates that secondary standards for manganese would be adequate to meet health related requirements. Adoption of manganese secondary standards as primary standards would require treatment in the Ramsey system. At this time, there is no indication from USEPA regarding the direction of regulation of these contaminants. C. SECONDARY DRINKING WATER STANDARDS In addition to the National Primary Drinking Water Regulations that cover the contaminants that affect public health, USEPA recommends Secondary Drinking Water Regulations with limits on those contaminants that affect the aesthetic qualities of drinking water. The secondary regulations are intended to serve as guidelines and are not federally enforceable. Table 4.1 lists the secondary standards. Although the water utilities are not required to treat the Secondary Drinking Water Standards, they should be aware that keeping the quality of drinking water within these guidelines makes it more acceptable to consumers, thereby decreasing complaints. Total dissolved solids, including sulfates and chlorides, generally become a problem only in deep well sources. These constituents impart a mineral taste to the water and can cause gastrointestinal discomfort to those not accustomed to them. Since they are not effectively removed by conventional treatment, selection of a source with low levels of these constituents is quite important. As noted in Section 3, Water provided by the Ramsey water supply system has levels in excess of the recommended levels for iron and manganese. City of Ramsey, Minnesota — M21.34343 Page 4-5 Water System Study Prepared by Bolton & Menk, Inc.