A bill for an act requiring the department of natural resources to identify specific animal sources of pollutants to a water of the state when determining the water’s inclusion on a list of impaired waters.

HF 2530 requires Iowa's Department of Natural Resources (DNR) to identify specific animal sources contributing to fecal bacteria pollution before listing a water body as impaired under federal Clean Water Act rules. If fecal bacteria levels cause a water body to be considered impaired, the DNR must conduct microbial source tracking to determine the percentage contribution from each animal species (e.g., livestock, wildlife, pets) responsible for the pollution. This change applies specifically to waters listed under Section 303(d) of the Clean Water Act, which governs state water quality standards and impairment listings. The bill mandates this analysis as a prerequisite for inclusion on the state's impaired waters list, ensuring more precise identification of pollution sources.