San Pedro River, Arizona

Arizona Department of Environmental Quality (ADEQ) is responsible for conducting monitoring, assessment, reporting under CWA Sections 303(d) and 305(b) and TMDL development for the State of Arizona. More information about Arizona's programs may be found at Arizona Department of Environmental Quality's Water Quality Monitoring and Assessment page. Exit

Water Quality Standards

Information on Arizona’s Surface Water Quality Standards can be found at the Arizona Water Quality Standards page. Exit

Water Quality Assessment TMDL Summary Information for Arizona

Arizona's Integrated Report

On August 7, 2015, EPA approved Arizona’s 2012/2014 Section 303(d) list. The approval letter and enclosure are provided below under EPA Documents. The State’s 303(d) list is available from the website linked under State Documents.

EPA Documents

• EPA Documents for the Arizona Section 303(d) List
  EPA’s Approval Letter and Enclosure

State Documents

Arizona’s 2012/2014 Section 303(d) list of waters requiring a TMDL is available at the Arizona Department of Environmental Quality (ADEQ) Website. Exit

TMDLs in Arizona

Information on the status of TMDLs being developed or previously developed by ADEQ can be found on the ADEQ TMDL Program Monitoring and Assessment page Exitand EPA's Water Quality Assessment Report for Arizona. (Please note that the EPA TMDL tracking system is updated periodically but may not include all approved TMDLs.)