Antidegradation

Antidegradation refers to federal regulations designed to maintain and protect high quality waters and existing water quality in other waters from unnecessary pollution. 


Proposed revisions to the Iowa Antidegradation Procedure

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:

Petition for Rulemaking

Notice of Intended Action – Proposed revisions to Chapters 61 and 64
Proposed revised Iowa Antidegradation Procedure


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  

Additional Antidegradation Resources
Forms and Information
 
*.pdf
Exhibit 9A - Preliminary Review of Antidegradation Alternatives Analysis
PDF File Format
Financial Worksheet - Blank Form
DOC File Format
PDF File Format
Sample Public Notice
DOC File Format
PDF File Format
Public and Interagency Contact List  
PDF File Format
 
Examples
 
*.pdf
Example Alternative Analysis for a Municipal Wastewater Facility
DOC File Format
PDF File Format
Financial Worksheet - Completed Example
DOC File Format
PDF File Format
Example Alternative Analysis for Cooling Tower Chemical Switch  
PDF File Format
Example Alternative Analysis for a New Industrial Contributor to a Municipal WWTP  
PDF File Format
 
Other
 
*.pdf
Exhibit 3 - Waste Load Allocation Request Form and Instructions
DOC File Format
PDF File Format
Iowa Surface Water Classifications
DOC File Format
PDF File Format
Outstanding Iowa Waters (OIW) Maps - See document library at bottom of this page



Questions? Contact:
Larry Bryant, larry.bryant@dnr.iowa.gov; 515-725-8426
Connie Dou, connie.dou@dnr.iowa.gov; 515-725-8400


Outstanding Iowa Waters Map Iowa's Outstanding Waters
Download a printable map of overall locations of Iowa’s Outstanding Iowa Waters (OIW). For more detailed information about each specific stream, click on the individual OIW Maps shown below in the following table.

Outstanding Iowa Waters
    This folder is empty