Pollution Prevention for Construction Sites

Construction activities—which include remodeling, repairs and demolition—can generate a wide variety of contaminants that can pollute stormwater, including sediment and suspended solids, solvents, paints, cleaners, adhesives, wood treatments, heavy metals, asphalt and concrete, as well as trash and debris.


By implementing the procedures below during all construction, remodeling, repair and demolition activities, your business and project site can be part of the solution to stormwater pollution.

  • Follow the approved Stormwater Pollution Prevention Plan (SWPPP) and implement appropriate erosion & sediment controls and best management practices.

  • Keep the construction site clean and orderly. Sweep outdoor areas regularly, and put sweepings in the trash. Do not hose down debris into stormwater drains, drainage ditches or surface waters. ‚Äč 

  • Use stormwater drain covers, filter fabric, silt fences or secured liners to keep dust, sediment, other pollutants and wash water from entering the stormwater drainage system.

  • Store all construction materials indoors, or under a secure waterproof tarp or cover, wherever possible.

  • Do not dump any solid or liquid waste materials onto the ground or pavement, down a stormwater drain or into a drainage ditch or surface water.

  • Follow established best practices and procedures for concrete and asphalt installation, landscaping and fueling activities.

  • Heavy equipment, pumps and generators should be properly maintained, so they do not leak petroleum, hydraulic oil or other pollutants.

  • Remove debris and trash in a timely fashion. Properly dispose of construction debris and waste materials, including sweepings, sediment and wash water. Recycle residual building materials and supplies as much as possible.

  • For demolition activities, use water spray or approved dust suppressants to help control dust and particulates. The amount of water should be actively controlled and monitored to eliminate contaminated runoff from leaving the site. Avoid excessive and repeated applications of dust suppressant chemicals.

Cowlitz Clean Waters | cowlitzcleanwaters@gmail.com

Cowlitz Clean Waters is a collaborative initiative of the City of Kelso, City of Longview, Cowlitz County, Consolidated Diking Improvement District #1 (CDID#1), Kelso School District, Longview School District, Washington State University (WSU) Cowlitz County Extension and the Lower Columbia College.

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