NPDES Permit Program
We offer experienced assistance with obtaining your National Pollutant Discharge Elimination System (NPDES) permitting.
The NPDES permit program is designed to reduce adverse impacts to water quality from Municipal Separate Storm Sewer Systems (MS4s) in urbanized cities, counties and other localities affecting environmentally sensitive water bodies. Among the primary focus points of the NPDES permitting process is the control of urban and construction runoff.
Based on current MPCA permit requirements, affected communities and MS4s are required to develop a Storm Water Pollution Prevention Program (SWPPP) that addresses storm water management activities relative to the following six minimum control measures established as part of the NPDES process:
- Public education and outreach
- Public participation and involvement
- Detection and elimination of illicit discharge
- Control of construction site runoff
- Control of post-construction runoff
- Pollution prevention for municipal operations
The SWPPP will identify Best Management Practices (BMP) to address each of the control measures and set goals and timelines for implementation of each BMP. The permit process and SWPPP represent a substantial investment by each affected community in managing its storm water-related activities.
For those communities and other entities that are not explicitly affected by the MS4 permitting requirements, restrictive NPDES permit requirements are also mandated for storm water discharges due to construction activities. Construction and development sites disturbing as little as one acre are now required to submit NPDES permits. Also, new developments creating more than one acre of new impervious surface are required to include approved water quality BMPs in the site development design.
We have comprehensive experience with all facets of the storm water permitting process, including storm water management planning, municipal facilities mapping and management, GIS/GPS inventories, BMP design, capital improvement planning and construction administration. We welcome the opportunity to work with you as part of your storm water management and permitting team.
NPDES Permitting
- Comprehensive Storm Water Management Plans (SWMP)
- Storm Water Pollution Prevention Plans (SWPPP)
- Development of Ordinances and BMPs
- Assistance in meeting the 6 minimum measures of Phase II
- Study and Design of Flow Concentrations using XPSWMM, SLAMM, P8 and StormNET
Browse to our other water resources engineering services:
Comprehensive Storm Water Management Planning