Ala. Code § 11-99A-7: Immunity.

Districts, the members of the board, its officers, and agents shall have the same immunity from liability as a municipality and its officers. No civil action shall be brought or maintained against the district or any director thereof for or on account of the negligence of a district or director or its or his or her agents, servants, or employees in or about the construction, acquisition, installation, maintenance, operation, superintendence, or management of any facility or other improvement owned, controlled, maintained, or managed by the district.

No civil action may be maintained against an appointing government, its officers, servants, employees, or agents relating to any facility or other improvement owned, controlled, maintained, or managed by the district.