In addition to the state construction stormwater permit, Ecology will regulate you through newly adopted municipal stormwater permits. 104 cities and 17 counties have to get permits from Ecology to operate their municipal storm drainage systems. These permits tell local jurisdictions how to craft erosion control ordinances to regulate construction. Local erosion ordinances do not have to be developed or amended for two to three years, depending on your region. Below is some information to help you figure out what will be included in the local ordinances and how it will impact your business.

List of Cities and Counties Required to Get the State Municipal Permit

This chart shows a side-by-side comparison of the state permit process and the local process you can expect once your local erosion ordinance is updated to reflect the new municipal permit. (The chart uses the Western Washington Phase II permit; the Western Phase I and Eastern Phase II permits have some requirements that are different.)

Ecology's web site provides information on the municipal permit, including downloads of the three permits and their appendices.

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