SwIM – Stormwater Inlet Marking Program

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In May of 2015, SJRA completed a comprehensive Watershed Protection Plan (WPP) for the Lake Conroe watershed.  The WPP focuses on monitoring the water quality in Lake Conroe, reducing problems from future growth and other activities in the watershed, as well as educating the public about water quality and how they can improve the already excellent water quality in Lake Conroe.

Lake Conroe is currently one of the highest quality waterbodies in the greater Houston area.  In fact, Lake Conroe meets all Clean Water Act standards for contact recreation, public water supply, and aquatic habitat.  In order to maintain those high standards and above average designations, our community actions and behaviors need to be closely examined.

As a result of the above and as part of SJRA’s WPP, the Stormwater Inlet Marking (SwIM) Program was implemented.  The SwIM program has been used all across the nation to help educate the public about the effects of stormwater runoff from neighborhood streets and lawns on water quality.

There are a number of things that can be done do to prevent stormwater from carrying pollution to the water body.  For example:  proper removal of pet waste, trash pick-up, suitable chemical disposal, and accurate fertilizer application.  The SwIM program is designed to educate the public on how to keep Lake Conroe’s water quality great by serving as a reminder that what enters the stormwater inlet goes directly into Lake Conroe without being filtered or treated.

In addition to the educational aspect, the program gives the local community a chance to get involved by physically applying medallions to the top of stormwater inlets in neighborhoods that are in the Lake Conroe watershed.  As shown in the accompanying graphic, the medallions are made of aluminum with a green and blue color scheme and are four inches in circumference.

If you or an organization you are associated with would like to participate in the SwIM Program, please print out the appropriate forms and instructional documents, complete the form, and submit to the Lake Conroe Division.  Each group must fill out an Application Form and Liability Waiver.  Once SJRA staff has the opportunity to review and approve the completed application(s), you will be contacted to discuss acquiring an approved neighborhood to conduct the SwIM Program in.

Once a neighborhood or project area is chosen, each group will be given a volunteer kit with instructions.  Each kit contains everything the volunteers will need to complete medallion installation in their project area.

The kit contains the following:

  • Wire Brush
  • Adhesive
  • Metal Medallions
  • Safety Vests
  • Safety Cones
  • Safety Glasses
  • Gloves
  • 5 Gallon Bucket
  • Door Hangers

Training PowerPoint

Prior to installing the medallions on the stormwater inlet(s), volunteers will need to pass out door hangers to the homes in their project area.  The door hanger will serve as notification that the SwIM Program installation will occur in project area in the near future, as well as provide educational information on watershed protection and water quality.  Additional pieces have been created to serve as supplemental educational tools to spread the word about the SwIM Program.

Pilot Program:

On June 23, 2016, the SwIM Pilot Program was completed by the Lake Conroe Division’s Operations Department.  As part of the Pilot Program, two neighborhoods (Waterford Estates and Longmire on Lake Conroe) were selected based on size and proximity to the lake.  One week prior to the application date, SwIM door hangers were applied to each door in the neighborhood.

37 medallions were installed in a total of a three hour period, which included driving to each stormwater inlet, mobile device mapping, cleaning the area with a wire brush, applying adhesive, and placing the medallion.

Recent Activity:

Bentwater, which is one of the largest neighborhoods on Lake Conroe, has an estimated 645 stormwater inlets.  The stormwater inlets in Bentwater are owned and operated by Municipal Utility District (MUD) 18.  Hays Utility has been hired by MUD 18 to maintain the stormwater inlets in this neighborhood.  In support of the SwIM Program, MUD 18 has approved medallion application for all stormwater inlets, including neighborhoods within Bentwater.  SJRA will supply Hays Utility with the medallions and any other materials needed.

Any further SwIM projects will require acquiring additional funding for materials.

1577 Dam Site Road
Conroe, Texas 77304
936.588.3111

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SJRA receives no money from the state, nor does it collect any type of taxes. Income is primarily derived from the sale and distribution of water and treatment of wastewater. This revenue covers the cost of operation and maintenance as well as outstanding debt. Revenue bonds are sold to finance projects.


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