COMMENT PERIOD BEGINS | Modification of AZPDES Permit AZS000002 for the Pima County Phase I MS4

On Oct. 24, 2022, the public comment period begins for the proposal to modify Arizona Pollutant Discharge Elimination System (AZPDES) permit number AZS000002 to Pima County for the Phase I Municipal Separate Storm Sewer System (MS4). The comment period ends Nov. 23, 2022.

Public Notice Information

Public Notice No. 22-21

Published in: Arizona Daily Star on Oct. 24, 2022

AZPDES Permit No. AZS000002

ADEQ proposes to modify the county's permit to incorporate 24-hour emergency non-compliance reporting for spills, which may be harmful to public health and the environment.


Pima County


Municipal Separate Storm Sewer System (MS4)

Review Documents

Original Published Public Notice | View/Download > 
Draft Permit | View/Download > 
Draft Fact Sheet | View/Download >

You may also review the above documentation in person at the ADEQ Record Center | Learn How >

Public Comment Period 

Dates: Oct. 24, 2022 – Nov. 23, 2022

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by Nov. 23, 2022):

       Rosi Sherrill
       Water Quality Division
       1110 W. Washington St.
       Phoenix, AZ  85007