A. As used in this Section, “secondary contaminant” means a substance for which secondary maximum contaminant levels are established in the National Secondary Drinking Water Regulations of the Environmental Protection Agency, 40 C.F.R. part 143.

            B. The governing authority of St. Tammany Parish may require that water systems in the parish test for secondary contaminants in the drinking water that is distributed to parish residents.

            Acts 2021, No. 308, §1, eff. June 14, 2021.