Several HHS agencies have science-based missions and use such information in decision making. These agencies adapt the quality standards discussed in the Safe Drinking Water Act Amendments of 1996 (SDWA) (42 U.S.C. 300g-1(b)(3)(A) and (B)). The adaptation involves the commitment of these agencies to use: a.) the best available science and supporting studies conducted in accordance with sound and objective scientific practices, including peer reviewed studies when available and b.) data collected by accepted methods (if reliability of the method and the nature of the decision justify use of the data.) Additional detail relating to the standards employed by individual agencies is described in Part II, the individual agency section of these guidelines.