Antidegradation refers to federal regulations designed to maintain and protect high quality waters and existing water quality in other waters from unnecessary pollution.
Background and Additional Reference
Introduction to Antidegradation
Iowa Antidegradation Implementation Procedure (2-17-10)
List of Scenarios
Frequently Asked Questions
EPA Interim Economic Guidance for Water Quality Standards
Antidegradation Forms and Information
Examples:
Other:
Questions? Contact:
Larry Bryant at larry.bryant@dnr.iowa.gov or 515-725-8426