Texas Water Code - WATER § 66.403. Distribution of Assets

(a) If at the time a district is dissolved, the district has any surplus funds in any of its accounts, the board shall transfer those funds to the county that assumes jurisdiction over the facilities conveyed by the district, and the county receiving the funds shall use those funds to maintain the facilities conveyed.

(b) If more than one county assumes jurisdiction over district facilities, the board shall transfer the funds to each county based on the proportion of the proceeds of all indebtedness incurred by the district to acquire the land and construct the facilities conveyed to that county.