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Contaminant U.S. EPA California <br /> MCL (mg/L) Datea MCL (mg/L) Effective Date <br /> Disinfection Byproducfs <br /> 0.100 11129/79 0.100 3114183 <br /> Total Trihalomethanes eff: 11/29/83 11 <br /> 0.080 —eff: 111/02 1 0.080 6117106 <br /> Haloacetic acids five 0.060 eff: 111/029 0.060 6/17/06 <br /> Bromate 0.010 eff: 111102 9 0.010 6/17106 <br /> Chlorite 1.0 eff: 1/1/029 1.0 6/17/06 <br /> Treatment Technique <br /> Acrylamide T7 1/91 TT 918194 <br /> E ichloroh drin I TT 1191 TT 9/8/94 <br /> a. "eff" indicates the date the MCL took effect; any other date provided indicates when USEPA <br /> established (i.e., published)the MCL. <br /> b. Secondary MCL. <br /> c. MFL= million fibers per liter, with fiber length > 10 microns. <br /> d. Regulatory Action Level; if system exceeds, it must take certain actions such as additional <br /> monitoring, corrosion control studies and treatment, and for lead, a public education program; <br /> replaces MCL. <br /> e. The MCL for lead was rescinded with the adoption of the regulatory action level described in <br /> footnote d. <br /> f. Gross beta MCL is 4 millirem/year annual dose equivalent to the total body or any internal <br /> an; Sr-90 MCL=4 millirem/year to bone marrow; tritium MCL=4 millirem/year to total body <br /> g. Effective for surface water systems serving more than 10,000 people; effective for all others <br /> 1/1/04. <br /> h. TT=treatment technique, because an MCL is not feasible. <br /> Federal and State MCLS—Updated 09120107 Page 4 of 4 <br />