PUBLIC NOTICE | Proposed Modification of AZPDES Permit for the Pima County MS4 Phase I

Public Notice No. 21-11

Published in: Daily Territorial on Sept. 2, 2021

AZPDES Permit No. AZS000002

ADEQ proposes to modify an Arizona Pollutant Discharge Elimination System (AZPDES) permit 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

ADEQ proposes to modify the County’s permit to incorporate new state water quality law provisions. The modification will authorize discharges to Protected Surface Waters. 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: Sept. 2, 2021 – Oct. 2, 2021

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by Oct. 2, 2021):

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

A public hearing request must be in writing and must include the reasons for such request.