Northern Middlesex Stormwater Collaborative
Meeting New Water Quality Requirements - On-line Guidance Tool for Development
A new online tool to address watershed-based stormwater requirements is now available from the Northern Middlesex Stormwater Collaborative. Municipal staff, the development community, and homeowners involved in development or redevelopment of properties can use this on-line guidance tool to meet design criteria required by the 2016 EPA National Pollution Discharge and Elimination System (NPDES) Municipal Small Separate Storm Sewer (MS4) General Stormwater Permit (General Permit). Tighe & Bond prepared this guidance and on-line tool for the “Northern Middlesex Capacity Building for Local Oversight of Development and Redevelopment Projects" funded by the 2019-2020 MS4 Municipal Assistance Grant Program (ENV 20 MVP 01).
The General Permit has added new watershed specific requirements to local code. To comply with the revised bylaws and regulations municipal staff and permit applicants first need to understand the status watershed and waterbody water quality impairments and applicable published total daily maximum loads (TMDLs) for impairments. These impairments will drive specific site design requirements under the new code. This on-line guidance tool will help applicants locate their project site, identify receiving waters, determine the water quality impairments, and explore options to meet the new local code.
This tool will provide sub-basin level receiving water and pollutant information as an initial screening tool to guide site design and selection of stormwater management techniques. Please consult your local stormwater permit granting authority and your site design engineer to better understand how these requirements will affect your development or redevelopment project.
Municipality Specific Mapping Tool
Click to load Billerica map
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Click to load Pepperell
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Explore Required Water Quality Best Management Practices (BMPs)
Based on information provided from the “Mitigation of Impaired Waterbodies Form” you are now ready to explore options to mitigate the identified water quality impairments. Click on links below to learn about structural treatment and non-structural options for the impairments impacting your site. Explore options further by clicking on featured BMP elements highlighted in red within each table. Details from the Massachusetts Stormwater Handbook open in a separate page.
Additional Stormwater BMP Data Sources
