About Stormwater & Surface Water Management Fee

A Municipal Separate Storm Sewer System (MS4) is a conveyance, or system of conveyances (i.e., municipal streets, catch basins, curbs, gutters, ditches, channels, etc.) that is designed to collect stormwater and is owned and operated by a public entity. Stormwater from an MS4 is regulated under the National Pollutant Discharge Elimination System (NPDES) MS4 permit to reduce pollution from conveyance systems. Wyoming is a MS4 and is required to minimize pollutants that enter their systems through a Stormwater Pollution Prevention Plan (SWPPP). Each SWPPP includes six minimum control measures (MCM) that address the following areas:

1. Public Education & Outreach
2. Public Participation & Involvement
3. Illicit Discharge Detection & Elimination
4. Construction Site Stormwater Runoff Control
5. Post-Construction Site Management
6. Pollution Prevention & Good Housekeeping

In order to comply with a section of MCM 2, the poster board providing information on the work and implementation of the City’s MS4 program in 2024-2025 is available here. For each MCM, descriptions will be given on what the City did during the year to comply with the permit. The City must also offer an opportunity for the public to provide input on the adequacy of their SWPPP; to citizens who wish to supply comments on the City’s SWPPP, please email comments to City Administrator Robb Linwood at rlinwood@wyomingmn.org. If you have any further questions or concerns, please contact the City at 651-462-0575.

View our story map which gives you a quick overview of what MS4 is and how it affects our stormwater.

Why are these regulations in place?

Stormwater runoff is a leading source of water pollution and can harm surface waters such as lakes, rivers, streams, and wetlands. Management of stormwater runoff from urban and rural areas is very important for restoring and protecting surface waters. Check out this website for more information.

 

What does this fee have to do with Municipal Separate Storm Sewer System (MS4)?

The City of Wyoming is required by the Environmental Protection Agency’s (EPA’s) Clean Water Act to obtain a Municipal Separate Storm Sewer System (MS4) permit for managing nonpoint source stormwater. Non-point source stormwater is generally the overland flow of stormwater that does not originate from a single source or pipe, otherwise known as point source stormwater. The Municipal Storm Sewer System (MS4) general permit is issued by the Minnesota Pollution Control Agency.

The MPCA reissued the MS4 General Permit (MNR040000) on November 15, 2025. During this reissuance process, the City of Wyoming will continue to operate under the requirements of the 2020 MS4 permit. Once the new permit is issued, the City will apply for reauthorization and additional directions on gathering public comment will be published on the City's webpage. 

You may also find additional information on the MPCA’s Public Notices webpage by navigating to the City of Wyoming’s Intent to Reissue NPDES and SDS MS4 General Permit here. 

Submitting Written Comments:

The terms and conditions of the general permit are not open for public comment. The permit application, the eligibility for coverage under the general permit, and the ability to comply with requirements of the general permit are open for public comment.

To submit comments or petitions to the MPCA through the mail or email, you must state:

(1) Your interest in the permit application or the preliminary determination to issue coverage under a general permit.

(2) The action you wish the MPCA or Permittee to take, including specific references to the application materials you believe should be changed.

(3) The reasons supporting your position, stated with sufficient specificity as to allow the MPCA to investigate the merits of the position.

 

I haven’t heard of this fee before, when was this enacted?

On December 15, 1997, the City Of Wyoming ordained Section 240 as Surface Water Management Utility and adopted it into the city’s code of ordinances. It is operated as a public utility pursuant to Minnesota Statute Section § 444.075 (State law reference: Metropolitan groundwater management plan, Minnesota Statutes § 103B.255).

 

In order to obtain coverage under this permit, the City of Wyoming completed an application and developed a Surface Water Management Plan. The purpose of the plan is to provide a complete and intensive guide and reference for managing surface water resources within the city boundaries. 

 

The ordinance includes developing and implementing the permits six minimum controls, including public education and outreach; public participation and involvement; illicit discharge detection and elimination; construction site runoff control; post-construction site runoff control; and pollution prevention/good housekeeping practices. 

How is this maintained?

The storm drain system is a network of catch basins, manholes, channels and underground pipes that carry stormwater (rain water) to holding ponds and eventually to the Sunrise River. The network consists of public and private systems. The Streets Division is responsible for maintaining all 87,619 lineal feet of public storm sewer lines, 653 catch basins and its structures. Stormwater falling off yards, roofs, streets, and parking lots draining through this system before discharging into the rivers. The stormwater ponds are design to store and slowly release water over time - a day or two. During that period, some of the particles of sediment carried in the water fall to the bottom of the pond. Attached to these particles are various types of pollutants. Many of our ponds are designed to a specific size to hold the water long enough to allow pollutants to settle to the bottom. As sediment accumulates, it is more difficult for ponds to store the water long enough to allow the pollutants to settle out. Instead, they pass through and are carried further downstream. 

 

Stormwater ponds require maintenance and the removal of excessive sediment to allow the pond to function as designed. Crews dredge ponds to remove the sediment and dispose of it at an approved location. This practice allows the stormwater pond to more effectively handle stormwater runoff which improves overall water quality.

It is important to remember that the storm drain system is not a part of the wastewater collection system, which carries wastewater from homes and businesses to the treatment plant. Stormwater does not flow to the wastewater treatment plant.

 

The main components of the storm drain system that is visible above ground are:

• Roadside ditches

• Curb inlets - Catch basin

• Ditch inlets

• Channels - grass, concrete, stone (rip-rap) and some asphalt

• Outfalls (pipe openings)

• Stormwater retention pond

 

What are the benefits?

There are several benefits for you, whether you are on the city’s water and sewer system or have a well. The funds raised help keep our lakes, rivers, creeks, streams and more, clean and healthy as we invest the monies into protecting these waterways and sources. It keeps your well producing clean water, it keeps our fish, plants and wildlife healthy, it supports economic and recreational activities, and most importantly, it protects our human health.