PUBLIC NOTICE | Proposed Renewal of AZPDES Permit (AZS000002) for the Pima County MS4

Public Notice No. 20-28

Published in: Daily Territorial on Nov. 16, 2020

AZPDES Permit No. AZS000002

ADEQ proposes to issue an Arizona Pollutant Discharge Elimination System (AZPDES) permit renewal to discharge pollutants to Waters of the United States to the following applicant, subject to certain effluent limitations and special conditions:


Pima County MS4 Phase I
33 N. Stone, Suite 700
Tucson, Arizona 85726-7210

Facility Information

Pima County applied for a renewal AZPDES permit for the discharge of pollutants to Waters of the U.S. from Pima County’s municipal separate storm sewer system (MS4). The existing permit was issued in 2011 and expired 2016, but has been administratively continued pending reissuance of this permit. The permit requires the County to continue to implement and maintain a Stormwater Management Program to include control measures designed to reduce the discharge of pollutants to the maximum extent practicable. The permit establishes measurable goals to assess the efficacy of control measure design and implementation.

Review Documents

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

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

Public Comment Period 

Dates: Nov. 16, 2020 – Dec. 15, 2020

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by Dec. 15, 2020):

       Devin McAllister
       Water Quality Division
       1110 W. Washington Street
       Phoenix, AZ  85007

A public hearing request must include the reasons for such request.