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D R A F T .January 4, 2012 designated for domestic and municipal supply must, at a minimum, meet specific numeric objectives for chemical constituents, including maximum contaminant levels and secondary maximum contaminant levels contained in title 22 of the California Code of Regulations (Title 22).9 The Basin Plan provides, however, that the objectives "do not require improvement over naturally occurring background concentrations."10 The Basin Plan also incorporates the State Water Board's antidegradation policy, Resolution No. 68-16.17 The policy, entitled Statement of Policy with Respect to Maintaining High Quality of Waters in California (Antidegradation Policy), generally protects high quality surface waters and groundwater from degradation. Reductions in water quality are allowed only if the changes are (1) consistent with maximum benefit to the people of the state, (2) do not unreasonably affect present and anticipated beneficial uses, and (3) do not result in water quality less than applicable water quality objectives. Any activity that can lower the quality of high quality waters must comply with waste discharge requirements that "will result in the best practicable treatment or control of the discharge necessary" to prevent pollution and nuisance and to maintain "the highest water quality consistent with maximum benefit to the people of the State." D. Title 27 In addition, the State Water Board's Title 27 regulations apply to the City's land disposal activities. The regulations establish minimum standards governing the water quality aspects of waste discharges to land for treatment, storage, or disposal.12 The regulations classify wastes and contain siting, design, construction, monitoring, and closure requirements for waste management units, which include landfills, waste piles, surface impoundments, and land treatment units. For wastes classified as "designated wastes," Title 27 establishes containment criteria, including liner requirements, to prevent the wastes or leachate from migrating from the units to waters of the state and extensive monitoring requirements to detect releases of waste to groundwater or surface water.13 "Designated wastes" include nonhazardous wastes that contain pollutants that could be released from a waste management unit in concentrations exceeding applicable water quality objectives or that could reasonably be 9 Id. at III-9.00 through 10.00. 10 Id. at III-9.00. 11 Id. at IV-8.00&appen.A.2. 12 Cal. Code Regs., tit. 27, §20080, subd. (a). ' See id., §20210. 5.