Revised On: Jan. 15th, 2025 - 11:40 am
2024 Mining MSGP Available Jan. 16, 2025: Permittees who have coverage under the 2019 MSGP must submit a new NOI between Jan. 16, 2025, and April 16, 2025, to maintain permit coverage. Instructions for submitting a new NOI | View >
Industrial stormwater permitting is an important part of the federal Clean Water Act and the State Surface Water Protection Program law to ensure surface water quality. Certain industrial activities are required to obtain permit coverage in order to discharge stormwater to protected surface waters. Unlike wastewater that is treated before being discharged to protected surface waters, stormwater does not get treated. The stormwater program relies on best management practices to minimize pollutants in stormwater discharges. ADEQ issues the industrial stormwater MSGP in Arizona. The MSGP identifies 29 different sectors that are subject to permitting for industrial stormwater discharges to protected surface waters | View Sector List >
A facility must have permit coverage if an industrial activity falls within one of the sectors and will discharge stormwater to protected surface waters. If industrial stormwater will not discharge to protected surface waters, either directly or by way of a conveyance (such as a street, ditch, etc.), stormwater permit coverage is not required | View Discharge FAQs >
If a facility would otherwise be regulated by the MSGP, but are exempt from the requirement to obtain a permit because there is no exposure of industrial materials or activities to precipitation or runoff because the industrial materials and activities at the site are covered by a storm-resistant shelter, you may apply for a No Exposure Certification | View No Exposure FAQs >
2024 Industrial Stormwater MSGP
The 2024 MSGP is effective as of Jan. 16, 2025.
How to submit Notice of Intent (NOI) for coverage under the MSGP:
- Before submitting an NOI, you must complete a Stormwater Pollution Prevention Plan (SWPPP) | View Template & Requirements >
- To obtain, modify or terminate an NOI for an MSGP you will need to use myDEQ | Learn More >
Compliance Assistance
To help permittees stay in compliance with the 2024 MSGP, ADEQ has various report templates and forms available for download | Learn More >
Fees
Application fees are based on the size of the site/facility in acres. Annual fees will be invoiced each year the permit is active, in the anniversary month of the NOI.
More information about fees | View >
Do you need the AZPDES Industrial Stormwater Mining MSGP (Multi-Sector General Permit)? | See Mining >
