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Antidegradation refers to federal regulations designed to maintain and protect high quality waters and existing water quality in other waters from unnecessary pollution.
The Environmental Protection Commission and the Department of Natural Resources received a Petition for Rulemaking from the Iowa Association of Municipal Utilities, the Iowa League of Cities, and the Iowa Association of Business and Industry on April 25, 2016. The following documents are related to that Petition and the resulting rulemaking:
Notice of Intended Action – Proposed revisions to Chapters 61 and 64Final Rule – Proposed Revisions to Chapters 61 and 64Responsiveness Summary for Proposed Revisions to Chapters 61 and 64Proposed Revised Iowa Antidegradation Implementation Procedure (Final with markup)Proposed Revised Iowa Antidegradation Implementation Procedure (Final without markup)
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