(a) The commission annually shall conduct a comprehensive analysis of the complaints it receives, including analysis by the following categories:
(1) air;
(2) water;
(3) waste;
(4) priority classification;
(5) region;
(6) commission response;
(7) enforcement action taken; and
(8) trends by complaint type.
(b) In addition to the analysis required by Subsection (a), the commission shall assess the impact of changes made in the commission's complaint policy.