Stormwater - Power Washing

Pressure Washing a truck.Wastes generated from power / pressure washing are among the many common stormwater pollutants that can degrade water quality.  Pressure washing activities generate a variety of wastes.  Soap, oil and grease, and other residues can harm aquatic life and degrade water quality.  It is illegal to dispose of pressure wash water containing pollutants to the storm drain system!

Your Regulatory Requirements - County of San Diego, Stormwater Ordinance 

What can I do?
Use Best Management Practices (BMPs)! 
BMPs are techniques or controls used to prevent or reduce the discharge of pollutants, such as oil, antifreeze, and solvents, into the stormwater conveyance system also known as the storm drain system.

Stormwater Best Management Practices for the Pressure Washing Industry

Helpful Information and Documents:
General Stormwater BMP Brochure
Power Washing presentation
Pollutant Impacts on Water Quality
San Diego County Wastewater Agencies
CASQA BMP Handbooks

Tips: Use a vacuum recovery system to contain wash water for proper disposal.
          Use dry clean-up methods when possible.

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If you have questions or would like additional information, 
call the County Stormwater hotline at 1(888) 846-0800
or e-mail us at

Report a Stormwater Violation On-Line
Department of Public Works
Watershed Protection Program
5510 Overland Ave., Suite 410, MS O326
San Diego,  CA  92123,  USA
(858) 495-5318           Fax: (858) 495-5263