Developing Low Impact Development (LID) Standards

In 2009-2010, the Department of Ecology’s Water Quality Program conducted a process to develop definitions and standards for low impact development (LID) stormwater requirements in the Phase I Municipal Stormwater General Permit.


The Pollution Control Hearings Board (PCHB) ruled in August 2008 that Ecology must add requirements to the Phase I permit that apply to local governments covered under the permits. The PCHB ruled in February 2009 that Ecology begin to prepare Western Washington Phase II permittees for future implementation of LID. Ecology convened this stakeholder advisory process to provide input on those requirements.


EPA Region 10 funded Ecology to conduct an eight-to-ten month process to take input from two advisory committees: a technical advisory committee and an implementation advisory committee.


Over the next two-year process of reissuing the permits, Ecology will make a decision on LID permit requirements. The process for issuing permits includes a number of opportunities for public input. Ecology issues a draft permit for public review and comment as part of modifying any permit. It issues the final permit with a Response to Comments and information on appeal procedures. Ecology expects to incorporate the standards in the Stormwater Management Manual for Western Washington.

The Puget Sound Partnership (PSP) calls for these standards as a priority action in the 2008 Puget Sound Action Agenda. The PSP LID program has led the region in advancing LID.

Special Joint Technical and Implementation Advisory Committee Meeting On Ecology’s May 16 Preliminary Draft LID Language


May 26, 2011
9:30 AM to 3:00 PM

Federal Way City Council Chambers (Map)


Meeting Materials

Please bring your lunch.
Ecology will give an overview of the preliminary draft LID language for the 2012 permits and request input from committee members and the public.

Advisory Committee Meetings

Technical Advisory Committee
Committee materials, including a list of members, meeting materials, and committee documents.

Implementation Advisory Committee
Committee materials, including a list of members, meeting materials and committee documents.

From October 2009 to August 2010, Ecology conducted a structured and facilitated stakeholder process to provide input on the LID standards. The advisory committee meetings were open to the public with specific times on the agenda for public input. Committee materials are posted on the committee WebPages linked above. This includes meeting agendas, minutes, technical documents, contact information, the draft LID proposal outline, and comments on the proposal.

You may sign up for Ecology’s LID Standards Listserv to receive updates.

For additional information, contact Harriet Beale, Ecology Municipal Stormwater Planner, at or 360-407-6457.

Previously posted: LID Standards Process nomination packet.

LID Projects funded by Ecology