Why do I need an AZPDES Industrial Stormwater Non-Mining Multi-Sector General Permit (MSGP)?

Industrial stormwater permitting is an important part of the Clean Water Act to ensure surface water protection by requiring certain industrial activities to obtain permit coverage to discharge stormwater (to waters of the U.S.). 

Unlike wastewater that is treated before being discharged to a waters of the U.S., stormwater does not get treated.  The stormwater program relies on best management practices, such a good housekeeping measures, to minimize pollutants in stormwater discharges.  If industrial stormwater will not discharge to a waters of the U.S., either directly or by way of a conveyance (such as a street, ditch, etc.), stormwater permit coverage is not required. 

ADEQ issues the industrial stormwater MSGP in Arizona.  The MSGP identifies 29 different sectors that are subject to permitting for industrial stormwater discharges to waters of the U.S.

View Sector List >

A facility must have permit coverage if an industrial activity falls within one of the sectors and will discharge stormwater to a water of the U.S.

An initial fee is due at the time the operator submits the Notice of Intent (NOI) fee to ADEQ, and is based on the amount of acreage at the site. Permittees must also pay an annual registration fee based on the acreage of their facility, and fees continue until the industrial activity ceases or the facility closes, at which time the operator files a Notice of Termination (NOT) to end coverage.

How to submit Notice of Intent (NOI) for coverage under MSGP:

As of June 1, 2017, MSGPs are paperless with myDEQ.  

To obtain, modify or terminate an NOI for an MSGP you will need to use myDEQ | Learn More > 

  • SMART NOI (online) applications are no longer available as of May 31, 2017
  • NOI paper applications are no longer accepted as of May 31, 2017 

A SWPPP is required to be completed prior to submitting an NOI | View SWPPP Template & Requirements > 

AZPDES Industrial Stormwater Non-Mining MSGP & Fact Sheet | Download Zip Folder >


NOI application and annual fees are based on the number of acres being used for industrial activities at your facility: 

  • Less than 1 acre | $350 *
  • – 40 acres  | $500 * 
  • Greater than 40 acres  | $1000 *

$1,000 SWPPP first time review fee is required if any of your outfall(s) are within 2.5 miles of impaired, not-attaining, Outstanding Arizona Waters. $500 SWPPP review fee for when a second review is needed. 

Do you need the AZPDES Industrial Stormwater Mining MSGP (Multi-Sector General Permit)? | See Mining >