Stormwater management is extremely important in Southwest Washington. Each year Clark County receives an average of nearly 40 inches of precipitation. Over 70% of this rain is delivered between the months of November and March.

Our stormwater systems help to mitigate the flooding and contamination issues often associated with large volumes of rain hitting impervious surfaces like roads, buildings, and parking lots. As a Clark County business, you share a responsibility with the residents to keep the stormwater systems in check. Though maintenance is usual minimal, it is a critical part of keeping our roadways clear and drinking water safe.


Stormwater assessment

To meet the minimum requirements of the stormwater assessment, you will be asked to comply with current state and federal laws in keeping contaminants out of our stormwater systems. For more help greening your stormwater system, please see our resources listed below.

Short videos: stormwater and business responsibilities

Cover - an ounce of prevention is worth a pound of cure


Be prepared to contain and clean up spills


Wash water is wastewater. Spills of any kind should never be washed into a storm drain.


Maintaining your stormwater facility




Cary Armstrong - Clark County Environmental Services (360) 397-2121 ext. 4392

Bob Patterson - Clark County Environmental Services (360) 397-2121 ext. 4493


Become a green business

Learn about how your business impacts the environment and earn recognition for going green.

Featured Fact

In 2011, Clark County was able to recycle 33 tons of waste from 16 green building projects.

Upcoming Events

Green Business Morning Blend at The Heathman Lodge

December 17, 2015
8:00 am - 9:00 am

Join us for a festive Morning Blend! Green Business Morning Blend is an opportunity to network and discuss business