How often must the SWPPP be reviewed after it is developed?

The Storm Water Pollution Prevention Plan (SWPPP) must be reviewed at least annually after its development to ensure that it remains effective and relevant to the site’s activities. This annual review is essential because it allows operators to assess the performance of erosion and sediment control measures, evaluate any new potential pollutants, and make necessary adjustments based on changes in operations, site conditions, or regulatory requirements. Regular reviews help in identifying gaps or deficiencies in the plan, ensuring compliance with the National Pollutant Discharge Elimination System (NPDES) requirements, and maintaining the overall integrity of stormwater management practices.

While quarterly, biannual, or monthly reviews could provide more frequent assessments, the regulatory minimum for review is set at once a year. This timeframe strikes a balance between ensuring oversight and not burdening operators with excessive administrative requirements.