On March 16, 2026, the comment period begins for the draft Oak Creek Total Maximum Daily Load (TMDL), which is designed to identify the maximum amount of a pollutant that Oak Creek can receive and still meet water quality standards. The comment period ends April 15, 2026.

Background Information:

The purpose of a TMDL is to identify the pollution reductions needed to get a waterbody to meet water quality standards, thereby supporting the designated uses of the waterbody. ADEQ has drafted an update to the Oak Creek TMDL for Escherichia coli (E. coli) from 2010, and we present it for public comment. 

Review Documents:

• Original Published Public Notice | View Notice > 
• Draft TMDL | View Document >  
• Draft TMDL Fact Sheet | View FS >  
• In person at ADEQ Record Center | Learn How >

Public Comment Period:

Dates: March 16, 2026 – April 15, 2026

Comments may be submitted as follows:

• Online | Submit Comments >
• By Email | Send Email >
• By Mail (Must be postmarked or received by April 15, 2026):

ADEQ
Water Quality Division, Surface Water
Attn: Emily Ayers
1110 W. Washington St.
Phoenix, AZ  85007