to reduce or limit the stormwater run-off rate and quantity to
minimize impact on natural hydrology. Many jurisdictions require
stormwater management that fulfill the requirements of this
Option 1 - Existing Imperviousness is less than or equal to 50%.
Prevent the post-development peak discharge rate and quantity from
exceeding the pre-development peak discharge rate and quantity OR
Protect receiving stream channels from excessive erosion through
the use of a stream channel protection strategy and quantity
Option 2 - Existing Imperviousness is greater than 50%. Decrease
the volume of pre-development stormwater runoff volume by
- Retention Ponds
- Detention Ponds
- Pervious paving materials
- Green Roofs and/or Stormwater reuse
- When doing the calculations for this credit do not overlook
run-off from the roof.
- The stormwater management for this credit can be costly
depending on the design.
- Underground water storage has become more prevalent, but can be
- Many of the strategies used for this credit will also
contribute to SSc6.2.
- LEED uses a two-year storm event as the basis for the LEED
- 33% of all California LEED Certified projects achieved this
credit for LEED v2.1
Additional EDR Resources
Thinking outside the Box
Design Briefs: Design
For Your Climate
E-News for Designers: e-News #7: Design Communities with Built-in