Antidegradation refers to federal regulations designed to maintain and protect high quality waters and existing water quality in other waters from unnecessary pollution.
Antidegradation Background and Additional References:
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:
Example Alternative Analyses and Financial Worksheets:
Other Forms and Information:
Questions? Contact:
Larry Bryant at larry.bryant@dnr.iowa.gov or 515-725-8426