New PWD websiteToday, July 1st, updated Stormwater Regulations for development projects became effective.  In addition, Philadelphia Water unveiled a brand new website, redesigned to provide easy access to the Stormwater Management Guidance Manual and to submit a project application online.

Philadelphia Water is making changes to our Stormwater Regulations to meet Federal and State requirements under the Clean Water Act.  These changes will affect projects submitting a complete online application (ERSA) on or after July 1, 2015. Projects submitted prior to July 1st will be subject to the current Regulations.

A summary of the changes has been provided below.  If you have questions about the changes to the Stormwater Regulations and Plan Review Process, please email [email protected], call 215-685-6387, or share your feedback online.

Improvements to the Plan Review process:

  • Streamlined ERSA application
  • More access to Plan Review Staff through email and in-person meetings
  • On-line Stormwater Management Guidance Manual in easy-to-use format
  • New website with user log-on and site-wide search functionality among resources
  • New expedited review track for surface vegetated SMPs
Current July 2015
Water Quality Volume 1.0” 1.5”
Water Quality Rate (Combined Sewer) 0.24 cfs/acre 0.05 cfs/acre
Water Quality Treatment (Combined Sewer) 20% Volume Reducing 100% Pollutant Reducing
Water Quality Treatment (Separate Sewer) 100% Volume Reducing 100% Pollutant Reducing
Minimum Orifice Diameter 3 inches 1 inch (traditional orifice)
½ inch (underdrain orifice)
Surface Loading Ratio 10:1 16:1
Subsurface Loading Ratio 5:1 8:1
Bioretention Soil Volume Credit None 20% Void Space
Minimum Infiltration Rate 0.5 in/hr 0.4 in/hr
Disconnection Practices No changes