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Stormwater Treatment Credits:

Reduce Your Charge & Protect Our Streams

 

Credits of up to 80% off your Water Quality Protection Charge (WQPC) are available to property owners who maintain stormwater management practices on their property. Stormwater management practices are landscaping techniques or structures that help reduce stormwater runoff. They help prevent stream damage, flooding and erosion. Some practices even beautify your property!

The credit is provided to property owners who own and maintain on-site stormwater management practices (see a list of practices), and is based on the volume of water captured. The goal of the credit program is to provide incentives to property owners for helping to treat and control stormwater runoff.

Download the Water Quality Protection Charge Credit Brochure (14.91MB)

Download the Stormwater Management Techniques Poster (3.26MB)

 

What will Earn Me a Credit?

There are currently more than 7,000 stormwater management practices in the County. You may have one!  Types of practices eligible for a credit include:

AND MORE!:  ​View the Full List of Stormwater Management Practices Eligible for Credit

 

Example Residential Property with Multiple Stormwater Management Practices

Graphic of a house with several types of stormwater management practices, including a green roof and rain garden.

 

Am I Eligible for a Credit?

Only properties with stormwater management practices are eligible for a credit. Those practices must be maintained by the property owner and in accordance with the maintenance requirements of the Montgomery County Department of Environmental Protection. 

 

Do you have stormwater management practices on your property?

  • Yes!  Then you can apply for a credit!  Continue reading on this page for more details or start the application now.

  • No, but I want a credit in the future. 
    • The RainScapes program works with property owners to install stormwater management practices like rain gardens, conservation landscaping and green roofs. You could even receive financial incentives to help with the cost of installation, ON TOP OF, becoming eligible for a credit. What's better than that?   

  • Not Sure?

 

Image of a rain garden.
Maintaining a rain garden is a great way to earn a WQPC credit.

 

 

How Do Stormwater Credits Work?

Property owners who own and maintain stormwater management practices on their property are eligible to receive the credit (a credit is a reduction off your annual WQPC).

Remember:

  • The stormwater management practices must be maintained by the property owner and in accordance with the maintenance requirements of the Department of Environmental Protection (DEP).

  • The Residential Credit Calculator must be filled out and submitted by September 30th, the year the credit would go into effect.

  • Approved credits are valid for three years.

 

How Much Would My Credit Be?

The amount of the credit is based on the type of stormwater management and the volume of water treated. More intensive practices, such as wet ponds, dry ponds and bioretentions treat a lot of stormwater, and therefore, give property owners a large credit. Less intensive practices, such as rain barrels, cisterns and rain gardens, provide a smaller credit.

The credit program follows the guidelines issued by Chapter 5, Environmental Site Design, of the Maryland Department of Environment’s Stormwater Design Manual (PDF, 4.85MB). The term “Woods in Good Condition” is used in the manual to describe the condition in which the County should strive towards – meaning properties that meet “woods in good condition” characteristics are much better at storing, soaking in, filtering, evaporating, and consuming water. Figure 1.1 demonstrates the surface runoff of a developed and undeveloped site.

Graphic from the Environmental Site Design Manual about the impact of development on stormwater.

 


For Detached and Townhome Properties:

  • A reduction of up to 80% of the Water Quality Protection Charge will be awarded based on volume of water treated.

  • Deadline: The credit application is due by September 30th in order to be applied towards your current tax bill.

  • Photo documentation is necessary for completing your application. Download our Photo Help Guide (252KB) for how to upload images and what we are looking for from the images.

  • Having trouble?  Contact DEP at WQPC.Credits@montgomerycountymd.gov

 

Apply Now for a WQPC Credit for Residential Properties

 


Multi-family Residential and Non-Residential Property Owners:

  • A reduction of up to 50% of the charge will be awarded based on the volume of water treated by a combination of environmental site design and other stormwater management systems; or 80% reduction based on the volume of water treated, if the property is completely treated by environmental site design practices alone.    (Not sure what this means? Email us at WQPC.Credits@montgomerycountymd.gov)

  • Only one application needs to be completed for the condominium regime (e.g condo association). If the stormwater practice applies to all property owners within the condominium, then a list of tax accounts qualified for the credit must be included.

  • Deadline: The credit application is due by September 30th in order to be applied towards your current tax bill.

  • Having trouble?  Contact DEP at WQPC.Credits@montgomerycountymd.gov

 

Apply Now for a WQPC Credit for a Multi-Family Residential Property or Condominium

 

Non-Residential Property Owners:

  • A reduction of up to 50% of the charge will be awarded based on the volume of water treated by a combination of environmental site design and other stormwater management systems; or 80% reduction based on the volume of water treated, if the property is completely treated by environmental site design practices alone.   (Not sure what this means? Email us at WQPC.Credits@montgomerycountymd.gov)

  • The same property owner with multiple property parcels within the same drainage area may apply to receive treatment credit for all properties in the drainage area.

  • Deadline: The credit application is due by September 30th in order to be applied towards your current tax bill.

  • Apply for the credit using the online application.  Remember: the credit application is due by September 30th in order to be applied towards your current tax bill.

  • Having trouble?  Contact DEP at WQPC.Credits@montgomerycountymd.gov

 

 

Apply Now for a WQPC Credit for Non-Residential Properties

 

 

How are Credits Calculated?

 

           

 

Single-Family Residential Properties

Single-family residential properties, such as detached homes and townhomes, must complete the online Residential Credit Calculator to determine the value of their credit.

The Residential Credit Calculator takes several factors into account:

  • Type of stormwater management practice
  • The size of the stormwater management practice
  • The amount of impervious area treated by the stormwater management practice
  • The size of your property
  • The amount of your WQPC before the credits

 

Understand How Your Credit was Calculated. (1.39MB) Download this guide for an explanation of how the Calculator works and a breakdown of what information goes where.

  • The maximum credit that a single family residential property can receive is 80% based on the volume of water treated. The WQPC Credit for all eligible stormwater management systems cannot exceed 80% percent of the Water Quality Protection Charge.
  • Having trouble with the Residential Credit Calculator?  Contact DEP at WQPC.Credits@montgomerycountymd.gov

 

Photo documentation is necessary for completing the residential application. Download our Photo Help Guide (PDF, 252KB) for how to upload images and what we are looking for from the images.

 


Multi-family and Non-Residential Properties

 

The WQPC credits for multi-family residential and non-residential properties are calculated based on the amount of impervious area treated by each stormwater management practice.

The formula for calculating the credits is:

 

Image of the WQPC Credit Calculation. The amount of a WQPC Credit equals the Impervious Area Treated by stormwater management practices divided by the total impervious area. Multiple that number by the facility credit percentage and the WQPC.

 

Example 1:

Joanne owns a business property in Silver Spring. Her property is 6,000 square feet with 4,812 square feet of impervious surface area.  To begin, let's calculate her WQPC:

 

Image of the Water Quality Protection Charge Calculation. The Water Quality Protection Charge equals the Impervious Area of the Property in Square Feet divided by the ERU. Multiply that number by the Rate.

 

Image of the calculation for Joanne's WQPC.  4812 divided by 2406 multiplied by $88.40. This equals $176.80

 

 

Joanne has a rain garden on her property.  She entered the dimensions of her rain garden in the non-residential credit calculator and it determined that her rain garden based on its size and planting soil depth, treats 1,500 square feet of impervious surface.  Joanne is not treating 100% of her property, so her facility credit rate is 50%.

 

Image of Joanne's credit calculation.  1500 divided by 4812.  Multiply the number by 50% and $176.80.  The resulting credit is $27.56

 

 

Joanne would receive a tax credit of $27.56.  This equals 15.6% savings and after the credit, Joanne would have a final Water Quality Protection Charge of $149.24.

 

Example 2:

If Joanne also had a sand filter on her property, her W​QPC Credit would increase. Joanne is not treating 100% of her property, so her facility credit rate is 50%.

 

Image of Joanne's credit calculation with a rain garden and a sand filter. First, calculate 1500 divided by 4812 multiplied by 50%.  Then add it to 2500 divided by 4812 multiplied by 50%.  The resulting number should be multiplied by $176.80.  Joanne's new credit is $73.48.

 

If Joanne had a rain garden and a sandfilter, her WQPC Credit would be $73.48, which is a 41.5% savings. Joanne's WQPC Charge after credits is $103.32.

 

Quick Guide for Applying for a Credit

 

           

   

Single-Family Residential Properties

 

Credit Application Deadline: Due by September 30th in order to be applied towards your current tax bill.  Remember: Applications are good for three years!

 

What Do I Need to Fill Out a Credit Application?

All Information is Required:

  • Account ID as it appears on the property tax bill (8 digit number)
  • Check if this is a “new” or a “renewal” application.
  • Important: County regulations require property owners to renew the WQPC credit every three (3) years. 
  • Owner Name as it appears on your property tax bill.
  • Property Address, City, State, and Zip Code of the physical location of the property with an on-site Stormwater Management System.
  • Mailing Address, City, State, and Zip Code if different than site address. This is needed to send correspondence regarding credit application.
  • Telephone Number to contact property owner regarding credit application and coordination of site visit.
  • E-mail address to provide to contact property owner regarding credit application (include renewal reminder) and coordination of site visit.
  • Information on Stormwater Management Practices including:
    • Provide photos illustrating impervious area and each stormwater management practice. If engineering drawings are available, these can be provided as an attachment. Photos must include the entire site, the Stormwater Management System(s) and the impervious area(s) treated. Download our Photo Help Guide (PDF, 252KB) for how to upload images and what we are looking for from the images.
    • Attachment documentation including engineering drawings, photographs, etc.

 

Resources

For Your Application

 

Understanding the WQPC & Credit Program

Apply Now for a WQPC Credit for Residential Properties

 


Multi-Family and Non-Residential Properties

 

Credit Application Deadline: Due by September 30th in order to be applied towards your current tax bill.  Remember: Applications are good for three years!

 

What Do I Need to Fill Out a Credit Application?

Account Information (all information is required)

  • Account ID as it appears on the property tax bill (8 digit number)
  • Check if this is a “new” or a “renewal” application.
  • Important: County regulations require property owners to renew the WQPC credit every three (3) years. 
  • Owner Name as it appears on your property tax bill.
  • Property Address, City, State, and Zip Code of the physical location of the property with an on-site Stormwater Management System.
  • Mailing Address, City, State, and Zip Code if different than site address. This is needed to send correspondence regarding credit application.
  • Telephone Number to contact property owner regarding credit application and coordination of site visit.
  • E-mail address to provide to contact property owner regarding credit application (include renewal reminder) and coordination of site visit.

If a multi-family residential or non-residential property would like the Department of Environmental Protection (DEP) to perform the research and calculations necessary to receive a credit, DEP will complete the application on their behalf for 50% of the final value of the credit. For more information on DEP preparing credit applications, contact WQPC.Credits@montgomerycountymd.gov.

Otherwise, engineer certified plans to include are:

  • Total Impervious Area (square). This includes buildings, parking lots, walkways, driveways, sheds. Section 19-21 of the County Code defines Impervious Area as “[a]ny surface that prevents or significantly impedes the infiltration of water into the underlying soil, including any structure, building, patio, sidewalk, compacted gravel, pavement, asphalt, concrete, stone, brick, tile, swimming pool, or artificial turf.”
  • Year of Installation (required for determining Facility Credit Percentage).
  • Facility Size and Units (required by DEP to evaluate facility and treatment of impervious area). For example, rain garden size may be listed as number of square feet.
  • Impervious Area Treated by Stormwater Management System (required for calculating the credit). Include photograph of Stormwater Management System (required by DEP to evaluate practices and treatment of impervious area).

Want to appeal the final credit decision?

 

Apply Now for a Multi-family Residential or Non-Residential Credit

 


Appeal the Credit Decision

If after submitting a credit application, you do not agree with the credit amount given, you can file an appeal. 

If a credit application is denied, the property owner can appeal the decision within 10 days of the Director of the Department of Environmental Protection's written decision.  The Director will give a final decision and send it to the property owner.  If necessary, the property owner can then file an appeal of the Director's final decision. 

Appeal Deadline for Credits:* 

 

  • First Appeal: If an application for credit is denied, the property owner may appeal the decision by submitting a written request for reconsideration with supporting reasons to the Director of the Department of Environmental Protection within 10 days after the date of the Director's written decision.
  • Second Appeal:  If the Director does not approve the request for reconsideration, the property owner may appeal the Director's final decision within 10 days it is issued, as provided in Chapter 2A, Article I, of the County Code.

How to Submit a Credit Appeal?

*This is different from appealing your WQPC bill.  Learn more about appealing your Water Quality Protection Charge.