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Stormwater Technologies Clearinghouse
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The Clearinghouse:

MASTEP is not currently funded by MassDEP. Until funding is secured, the information listed on the web site will not be updated, no new BMP reviews will be conducted, and the web site may be terminated or shut down at the discretion of the University of Massachusetts, Amherst. In the interim, we suggest that you print or preserve your research so that you will not lose access to critical information.


The Massachusetts Stormwater Technology Evaluation Project (MASTEP) has created this web site to host a source of verified technical information on stormwater Best Management Practices (BMPs) to provide information on innovative technologies to BMP users. More...

MASTEP has changed its performance data review process. All technologies have been re-evaluated and scored according to the new system. For more information, go to the Database Documentation page.
You will find on this site:
square button A searchable database of innovative technologies.
We have removed the registration requirement to view the database, but invite you to register anyway. (Why?)
square button A Data Entry Tool for submitting technology specification and performance data to MASTEP. Once data is submitted, MASTEP applies a screening protocol to rate technologies based on validated studies. Vendors: In order to enter a profile for your BMP, you must first register and log in.
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Documents and links to relevant resources for structural controls and general information on BMP technologies and stormwater monitoring techniques

Information on this project and how to contact the staff

More about the database:
Click on the Search Database button under Database on the navigation bar above, which takes you to the searchable database web page. You can search BMPs by keyword or do an advanced search by manufacturer, pollutant treated, verification rating, BMP category, application type, or any combination of the above. Once you have selected your search parameters, a list of BMPs will appear on your screen, with links to each technology detailing its applications, test status, performance, etc. (as in the image at right).

Click on image to start exploring the database

Latest news from MASTEP:
06-30-2014 | MASTEP Project funding ending June 30, 2014 | As of June 30, 2014, MASTEP is no longer funded by MassDEP. Due to this lack of funding, information listed on the web site will no longer be updated, no new reviews will be conducted, and the web site may be terminated or shut down at UMass’s discretion.
10-16-2013 | New England Stormwater Technology Workshop | New England Stormwater Technology Workshop November 19, 3013. 8:30 – 11:30 AM Not Your Average Joe’s Restaurant 111 Pond Street Norwell MA 02061
09-11-2013 | MassDEP standardizes method for converting water quality volume to flow | The MassDEP Wetlands Program has standardized the method to convert the stormwater water quality volume to a peak flow rate for purposes of sizing proprietary manufactured stormwater treatment devices that are sized using flow rate, for when they are proposed in connection with proposed development or redevelopment in wetland resource areas.
06-20-2013 | Stormwater Advocates Training offered by the Massachusetts Watershed Coalition. | The Massachusetts Watershed Coalition will offer unique training this summer (2013) about simple ways to restore stream life and revive the uses of local streams and lakes. This Stormwater Advocates Training (SWAT) program includes a mix of workshop sessions, guidance materials and fieldwork that will enable participants to reduce polluted runoff.
06-28-2012 | WRRC awarded new MASTEP contract | The Water Resources Research Center at the University of Massachusetts received a new award from Mass. Department of Environmental Protection to continue the MASTEP web site, update existing BMP profiles with new study data, and add new proprietary, conventional and LID technologies to the database.
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