Stormwater NPDES Services
 Stormwater Requirements
Mandated by Congress under the Clean Water Act, the National Pollutant Discharge Elimination System (NPDES) Stormwater Program is a comprehensive national program for addressing the nonagricultural sources of stormwater discharge that adversely affect the quality of our nation’s waters. The Program uses the NPDES permitting mechanism to require the implementation of controls designed to prevent harmful pollutants from being washed by stormwater runoff into local water bodies. Under the program, NPDES permits are required for stormwater discharges from:
- Regulated Municipal Separate Storm Sewer Systems (MS4s) that are publicly owned or operated systems serving populations of more than 100,000.
- MS4s that serve populations of less than 100,000 located in urbanized areas, or those designated by their permitting authority.
- Eleven categories of industrial activities.
- Construction activity (included as one of the industrial activities) that would disturb more than 1 acre.
 The compliance obligations imposed by NPDES permits for these types of discharges can be significant. Failure to obtain a permit and comply with its conditions can result in exposure to both civil and criminal liabilities. Compliance obligations also vary from state to state and among EPA regions. Some of the compliance requirements for each discharge type are illustrated in the diagram to that follows.
What PBS&J Provides
Compliance with NPDES permits requires a broad and diverse array of scientific and engineering expertise. PBS&J is a recognized leader in stormwater management issues. We are proud of our long history of assisting local governments, businesses, and developers in addressing compliance with NPDES permit requirements. PBS&J provides a full range of services for NPDES permit compliance in all aspects of stormwater management including:
- Municipal program development
- Stormwater pollution prevention plans
- Public involvement and education
- Lead-permittee and multipermittee coordination systems
- Permittee compliance tracking and reporting
- Watershed management
- Wet and dry weather monitoring
- Regional, local, and site-specific planning
- Water quality modeling and analysis
- GIS mapping and integrated databases
- Stormwater management retrofitting
- BMP design, implementation, and evaluation
- Hydrology and hydraulics
- Numeric sizing programs and design
- On-site monitoring, testing, and reporting
- Compliance and enforcement training.
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