Texas Water Code - WATER § 65.201. Powers

(1) supply water for municipal uses, domestic uses, power and commercial purposes, and other beneficial uses or controls;

(2) collect, transport, process, dispose of, store, and control domestic, industrial, or communal wastes whether in fluid, solid, or composite state;

(3) gather, conduct, divert, and control local storm water or other local harmful excesses of water in the district;

(4) irrigate the land in a district;

(5) alter land elevation in a district where it is needed;  and

(6) provide fire-fighting services for the inhabitants of the district.