(a) TxDOT is responsible for the development, construction, maintenance, and operation of the state highway system and other transportation systems as designated by the legislature.     
      (b) TCEQ is the state air and water pollution control agency and is the principal authority in Texas on matters relating to the quality of the state's air and water resources, including the following:      
        (1) Air quality. TCEQ's primary responsibility relating to air, as designated by Health and Safety Code, §382.002, includes, but is not limited to, setting standards, criteria, levels, and emission limits for air quality and air pollution control; and       
        (2) Water quality. TCEQ is charged with the protection of water quality, water rights, and the adoption and enforcement of rules and performance of other acts relating to the safe construction, maintenance, and removal of dams. TCEQ's jurisdiction over water quality, water rights, and enforcement of both water quality, water rights, and dam safety includes, but is not limited to, those items outlined in Water Code §5.013.       
     Source Note:        The provisions of this §2.304 adopted to be effective March 20, 2019, 44 TexReg 1447