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Bacteria Tastes and Odors In ground waters used for domestic or municipal Ground waters shall not contain taste-or odor- supply(MUI)the most probable number of coliform producing substances in concentrations that cause organisms over any seven-day period shall be less nuisance or adversely affect beneficial uses. than 2.2/100 H. Chemical Constituents Toxicity Ground waters shall be maintained free of toxic Ground waters shall not contain chemical substances in concentrations that produce detrimental constituents in concentrations that adversely affect physiological responses in human,plant,animal,or beneficial uses. aquatic life associated with designated beneficial use(s). This objective applies regardless of whether At a minimum,ground waters designated for use as the toxicity is caused by a single substance or the domestic or municipal supply(MUI)shall not interactive effect of multiple substances. contain concentrations of chemical constituents in excess of the maximum contaminant levels(MCLS) specified in the following provisions of Title 22 of the California Code of Regulations, which are incorporated by reference into this plan: Tables 64431-A(Inorganic Chemicals)and 64431-B (Fluoride)of Section 64431,Table 64444-A(Organic Chemicals)of Section 64444,and Tables 64449-A (Secondary Maximum Contaminant Levels- Consumer Acceptance Limits)and 64449-B (Secondary Maximum Contaminant Levels-Ranges) of Section 64449. This incorporation-by-reference is prospective,including future changes to the incorporated provisions as the changes take effect. At a minimum,water designated for use as domestic or municipal supply(MUI)shall not contain lead in excess of 0.015 mg/l. To protect all beneficial uses, the Regional Water Board may apply limits more stringent than MCLs. Radioactivity At a minimum,ground waters designated for use as domestic or municipal supply(MM shall not contain concentrations of radionuclides in excess of the maximum contaminant levels(MCLs)specified in Table 4(MCL Radioactivity)of Section 64443 of Title 22 of the California Code of Regulations,which are incorporated by reference into this plan. This incorporation-by-reference is prospective,including future changes to the incorporated provisions as the changes take effect. WATER QUALITY OBJECTIVES 111-10.00 19 July 2002