This is issued approximately monthly from the STEP office, and covers many items related to LID, including notices of significant updates to the Planning and Design Guide.
You can sign up on the STEP website.
Sustainable Technologies Evaluation Program
Low Impact Development. A stormwater management strategy that seeks to mitigate the impacts of increased urban runoff and stormwater pollution by managing it as close to its source as possible. It comprises a set of site design approaches and small scale stormwater management practices that promote the use of natural systems for infiltration and evapotranspiration, and rainwater harvesting.