SWPPP or Storm Water Prevention Pollution Plan is the identification of any possible source of pollutants and erosion from an active construction site that may contaminate or otherwise harm our environment. In the SWPPP there will also be descriptions of plans to prevent such run off from leaving the site and procedures from operators to ensure compliance.

SWPP plans are required for construction sites that disturb one or more acre of earth. Additionally, smaller sites that contribute to a greater plan of development (e.g. building in a sub-division) will require a SWPPP as well. City, state and other laws may impose further requirements for site that need a SWPPP.