Today, 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
|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|