1. Addition of eutrophication standards for river systems;
2. Modification of the existing turbidity standards;
3. Additions or revisions of numeric water quality standards for protection of aquatic life based on U. S. Environmental Protection Agency (EPA) 304(a) Ambient Water Quality Criteria for cadmium, copper, diazinon, and nonylphenol;
4. Re-evaluate the aquatic life standard for chloride;
5. MPCA-derived Class 2 water quality criteria for nitrate based on aquatic life toxicity;
6. Updates to human health-based water quality standards needed to maintain consistency with the Minnesota Department of Health’s Health Risk Limits in Minn. R. ch. 4717 (currently under revision) and EPA’s Methodology for Deriving Ambient Water Quality Criteria for the Protection of Human Health (2000);
7. Re-evaluate and update existing Class 3 (Industrial Consumption) and Class 4 (Agriculture and Wildlife) water use standards;
8. Potential water use classification changes for specific water bodies, including updating Class 2A trout waters and reviewing and adding Class 7 limited resources value waters; and
9. Minor administrative changes.
Caltha LLP provides expert consulting services to public and private sector clients nationwide to address water quality standards, wastewater permitting and assessing potential impacts of chemicals in the aquatic environment.