Greetings, stormwater professionals:

The Minnesota Pollution Control Agency is hosting an important Webinar on street sweeping for water quality improvement and MS4 permit crediting.

It is Thursday, May 13th, 9:30 – 11:00 AM Central Daylight Time. See below for details and Web links.

This is big news for MS4 programs throughout the United States. This is up-to-date research linked to measurement protocols to develop a crediting program for MS4 permittees to reduce phosphorus in their stormwater, get credit in their MS4 permits, and make progress toward meeting TMDL WLAs. This makes the case for street sweeping as one of our most important and cost-efficient (<$100/lb to remove P) stormwater BMPs.

The speakers are good, the research is fascinating, and the information is useful and actionable for MS4 programs everywhere.

May 2021 street sweeping webinar – Minnesota Stormwater Manual (

Please join us.

Stay safe,

Randy Neprash

Randy Neprash, PE

Vice-Chair, National Municipal Stormwater Alliance

Staff, Minnesota Cities Stormwater Coalition

Stormwater Regulatory Specialist, Stantec Consulting

Cell: 651-271-5535


The Minnesota Pollution Control Agency (MPCA) is hosting a live webinar on street sweeping, Thursday May 13, 9:30-11:00 AM. 1.5 professional development hours (pdh) are available for attending this webinar.

This webinar will provide information on the importance and value of street sweeping for controlling nutrient loading to receiving waters, an overview of a new street sweeping crediting tool for phosphorus, a discussion of street sweeping guidance, and a discussion of additional research needs. The tentative agenda is as follows.


  • Opening statement – the importance and value of street sweeping: Randy Neprash, PE, Minnesota Cities Stormwater Coalition, Stantec
  • Discussion of trees as a source of nutrients in urban stormwater, focused on impacts of trees:  Sarah Hobbie, Distinguished McKnight University Professor, Dept. of Ecology, Evolution & Behavior, University of Minnesota
  • Overview of recently developed street sweeping calculator: Aileen Molloy, Tetra Tech
  • Overview of draft guidance for street sweeping: Hillary Yonce, Tetra Tech
  • Discussion of additional research needs: William Selbig, Research Hydrologist, USGS Upper Midwest Water Science Center
  • Q&A

Link here for information on street sweeping

Webinar information

MPCA Collaboration invites you to join this Webex meeting.

Meeting number (access code): 187 072 8914

Meeting password: 2w6pHMmTUF7

Thursday, May 13, 2021, 9:30 AM, (UTC-05:00) Central Time (US & Canada), 1 hr 30 mins

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