Industrial stormwater guidance

Permit 

• 2025 Multi-Sector General Permit for Industrial Stormwater (wq-strm3-102g)

  Effective June 1, 2025
• Updates and new requirements for the 2025 Multi-Sector General Permit for Industrial Stormwater (wq-strm3-102f)
• 2020 Industrial Stormwater General Permit (wq-strm3-67i)

  Expired March 31, 2025

Permit applicability

• Is my facility required to obtain the Industrial Stormwater general permit? (wq-strm3-02b)

Stormwater pollution prevention plans (SWPPP)

• Template: Industrial Stormwater Pollution Prevention Plan (wq-strm3-28)
• Industrial Stormwater Pollution Prevention Plan checklist (wq-strm3-57)
• Mercury minimization plan checklist (wq-strm3-30)
• Industrial stormwater monthly site inspection form (wq-strm3-56)

Best management practices (BMP)

• Industrial stormwater best management practices guidebook (wq-strm3-26)
• Video: Best management practice options for total suspended solids (6 min.)

No Exposure

• Qualifying for, and keeping, the No Exposure exclusion (wq-strm3-13)

Sampling

• Webex: Industrial stormwater reporting signatory training (46 min.)
• Webex: Industrial stormwater sampling/monitoring reporting in e-Services (65 min.)
• Industrial stormwater reporting guidance (wq-strm3-98)
• Industrial stormwater waiver request (wq-strm3-68)
• Industrial stormwater sheet flow sampling guidance (wq-strm3-33a)
• Video: How to collect a sheet flow sample (6 min.)
• Industrial stormwater: How to collect a grab sample (wq-strm3-33b)
• Video: How to collect a grab sample (4 min.)
• 2020-2025 Industrial stormwater sampling worksheet (wq-strm3-69)
• Benchmark and effluent monitoring location diagrams for all sectors (wq-strm3-29)
• Benchmark monitoring (wq-wwprm2-11)

e-Services 

• Getting started with MPCA e-Services (p-gen1-17)
• Guidance: Notification of permit termination e-Service (p-gen1-18)
• Industrial Stormwater e-Services guidance (p-gen1-19)
• Online training: industrial stormwater
• Industrial stormwater electronic signature submittal agreement (wq-strm3-97)
• Guidance: Industrial stormwater annual report e-Services (p-gen1-24)
• Webex: Industrial stormwater - monitoring service in e-Services (65 min.)

Additional stormwater-related guidance

• Smart Salting training: MPCA works with private and municipal salt applicators to help them use less salt and save money. Learn about training opportunities, parking lot/sidewalk maintenance recommendations and more.
• Concrete, paint, stucco and other washout guidance (wq-strm2-24)
• Wastewater permits: Permitting for wastewater/wash water that is discharged into surface and groundwater.
• Nonmetallic mining: Permitting for facilities that mine construction sand and gravel; quarry limestone, granite or dimension stone; operate hot mix asphalt production areas and/or have concrete manufacturing/recycling activities.
• Dust control treatments for roads and surfaces (aq1-15)
• Hazardous waste management: In Minnesota, commercial entities that produce any amount of hazardous waste are regulated as hazardous-waste "generators" with requirements that depend upon the amount of waste they produce.
• Powerwashing and other water-based blasting (w-hw4-39b)
• Storage tanks: Regulations for commercial storage tanks in Minnesota.
• Feed storage areas for animal feedlots (wq-f8-20)
• Minnesota Technical Assistance Program (MnTAP): An outreach program that helps Minnesota businesses to prevent pollution, maximize efficient use of resources, and reduce energy use.