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Stormwater Division
In recent years regulations have been tightening on stormwater. So, what is it, why do we care?

Stormwater is rainwater after it hits the ground. Then it becomes ground water or surface water.

It is a hot topic because surface water can have all sorts of impacts as we develop our communities.

  • Increased flooding risks: More houses means less ground water, means more surface water.
  • Water pollution: Surface water crossing yards, streets, etc picks up just about anything including trash, motor oil, dirt. You get the picture.
  • Increased erosion and property damage: When the water is focused in narrow areas rather than broad fields or forests, it has a lot more energy and volume.
  • Polluted local waterways: Anything and everything that surface water picks up ends up in our rivers and streams. Yuck!

So....stormwater has some impacts on how we want our communities, homes and streams to function. Read on to see how our community is dealing with stormwater issues or check out our FAQ page to get the highlights of the recently adopted Stormwater Ordinance.


Chapter 16.20 Revision 

Information on the recent revision to Chapter 16.20, Development in Drainage Courses.

Chapter 16.22 Adoption 

The Cowlitz County Stormwater Drainage Ordinance is a requirement of the National Pollution Discharge Elimination System (NPDES) Phase II Municipal Stormwater Permit issued to Cowlitz County by the Washington State Department of Ecology. 

Stormwater Program

On February 16, 2007, Cowlitz County was issued a National Pollution Discharge Elimination System (NPDES) phase II Municipal Stormwater Permit.  This permit requires the County to develop and implement a Stormwater Program. This permit was reissued on August 1, 2013.  Check out this link to find information about the program and what it means to Cowlitz County.


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