Water Quality Standards rules, rule reference documents, and other key information used by the department can be found in the links below for easy reference:
Iowa Administrative Code, Chapter 61: Water Quality Standards
Antidegradation Implementation Procedure – Effective February 17, 2010 New Surface Water Classifications Document - Effective December 22, 2010 Aquatic Life Assessment Field Data Sheet Habitat Evaluation
Warm Water Stream Use Designation Protocol, updated March 22, 2006 Cold Water Protocol - Effective December 15, 2004 Recreational Use Assessment and Attainability Analysis Protocol Basin Plan Support Document – Introduction Basin Plan Support Document – Wasteload Allocations