The district may not exercise the power of eminent domain outside the district boundaries to acquire:
(1) a site for a water treatment plant, water storage facility, wastewater treatment plant, or wastewater disposal plant;
(2) a site for a park, swimming pool, or other recreational facility, as defined by Section 49.462, Water Code;
(3) an exclusive easement through a county regional park; or
(4) a site or easement for a road project.