Washington State University Extension and Stormwater Center administer the Low Impact Development (LID) Certification.  Low Impact Development refers to the restoration of pre-disturbance hydrologic processes of infiltration. Rainwater is allowed to soak into the land much as it has for eons before human development occurred. 

Methods to allow infiltration include: 

• Pervious paving

• Raingardens (infiltration swales)

• Rainwater collection and retention for later use in irrigation

• Green roofs which allow rainwater to be used by and evaporated from plants on the roof.

Rhene Johns is LID certified and provides consultation in sustainable site development.