Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Monitoring, Assessment and TMDLs
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Arizona Water Quality
Arizona Department of Environmental Quality 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.
Water Quality Standards
Information on Arizona’s Surface Water Quality Standards can be found at the Arizona Water Quality Standards page.
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. The State's 303(d) list is available at the link under State Documents, below.
Stephen Maurano (email@example.com)
U.S. Environmental Protection Agency
75 Hawthorne St, WTR-2-1
San Francisco, CA 94105
On August 7, 2015, EPA approved Arizona's 2012/2014 Section 303(d) list. The approval letter and enclosure are provided below.
Arizona's 2012/2014 Section 303(d) list of waters requiring a TMDL is available at the Arizona Department of Environmental Quality (ADEQ) Website.
TMDLs in Arizona
Information on the status of TMDLs being developed or previously developed by Arizona DEQ can be found on Arizona DEQ's TMDL Program Monitoring and Assessment page and 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.) In addition, EPA completed one TMDL for copper in Pinto Creek, AZ at the request of the State of Arizona.