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Stormwater-General
National Summary
Stormwater runoff is generated when precipitation from rain and snowmelt events flows over land or impervious surfaces and does not percolate into the ground. Such runoff accumulates debris, chemicals, sediment, and other pollutants and is a major source of pollution that damages rivers, lakes, streams, and coastal waters of the United States. To address this problem, the U.S. Environmental Protection Agency (EPA) has developed a federal program under the Clean Water Act's (CWA) National Pollutant Discharge Elimination System (NPDES) program to regulate stormwater discharge sources. The CWA prohibits any person from discharging pollutants into a waterway from a point source unless a permit issued either by the EPA or an authorized state agency authorizes the discharge.
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Guidance Documents 2007 Memorandum: Using Green Infrastructure to Protect Water Quality in Stormwater, CSO, Nonpoint Source and Other Water Programs  National
Guidance Documents 2010 Memorandum: Revisions to the November 22, 2002 Memorandum - Establishing TMDL Wasteload Allocation for Stormwater Sources and NPDES Permitting Requirements for Those WLAs  National
Final Regulations 40 CFR 122 - Stormwater Discharges From Logging Roads 12/07/2012National
Proposed Regulations 40 CFR 122 - Notice of Proposed Revisions to Stormwater Regulations To Clarify That an NPDES Permit Is Not Required for Stormwater Discharges From Logging Roads 09/04/2012National
Questions & Answers Are facilities required to conduct monitoring under USEPA's general permit? 12/07/1999National
Questions & Answers Are the 2003 stormwater rules retroactive? I have a several trucking terminals that discharge from pavement through storm drains to streams with no permits. Are we in/out of compliance? 11/24/2003National
Guidance Documents Community Solutions for Stormwater Management: A Guide for Voluntary Long-Term Planning  National
Questions & Answers Do I have flexibility in preparing the storm water pollution prevention plan (SWPPP) and selecting best management practices (BMPs) for my site? 12/07/1999National
Questions & Answers Do I need a NPDES permit if my stormwater exposure is only in the parking lot? 12/06/2004National
Questions & Answers Do storm water discharges from non-industrial areas (such as employee parking lots) at an industrial facility have to be addressed in the NPDES permit? 12/07/1999National
Guidance Documents Establishing TMDL Waste Load Allocations (WLA) for Stormwater Sources and NPDES Permitting Requirements for Those WLAs  National
Guidance Documents Green Infrastructure Permitting and Enforcement Series Factsheet 1: General Accountability Considerations for Green Infrastructure  National
Guidance Documents Green Infrastructure Permitting and Enforcement Series Factsheet 2: Combined Sewer Overflows  National
Guidance Documents Green Infrastructure Permitting and Enforcement Series Factsheet 3: Sanitary Sewer Overflows  National
Guidance Documents Green Infrastructure Permitting and Enforcement Series Factsheet 4: Stormwater  National
Guidance Documents Green Infrastructure Permitting and Enforcement Series Factsheet 5: Total Maximum Daily Loads (TMDLs)  National
Guidance Documents Green Infrastructure Permitting and Enforcement Series Factsheet 6: Water Quality Standards  National
Questions & Answers How do I know which permit conditions apply to me? 12/07/1999National
Questions & Answers How many Notices of Intent (NOIs) must I submit? Where and when are they sent? 12/07/1999National
Questions & Answers If a project will not be completed before this permit expires, how can I keep permit coverage? 12/07/1999National
Questions & Answers Is the SWPPP the same as an SPCC plan? 12/07/1999National
Questions & Answers Must every permittee have a separate SWPPP, or is a joint plan allowed? 12/07/1999National
Questions & Answers My project will disturb less than 5 acres, but it may be part of a "larger common plan of development or sale." How can I tell what applies to me and what must I do? 12/07/1999National
Questions & Answers My question has to do with discharge of steam condensate and SWPPP. 05/17/2004National
Calculators National Stormwater Calculator  National
Notices Notice of corrections to the 2012 Construction General Permit 08/07/2012National
Forms NPDES Applications and Forms  National
Regulatory Analysis Stormwater - General  National
Checklists Stormwater Sampling Kit Inspection Checklist  National
Guidance Documents Stormwater Wet Pond and Wetland Management Guidebook  National
Guidance Documents Technical Guidance on Implementation of the Stormwater Runoff Requirements for Federal Projects under Section 438 of the Energy Independence and Security Act  National
Questions & Answers Throughout our construction project, we have amended our SWPPP several times. What are our obligations now that we have altered our SWPPP? 11/02/2016National
Questions & Answers We recently purchased an existing building, but renovations need to be completed prior to moving into the building. What types of indoor/outdoor activities would trigger the need for a permit? 10/28/2016National
On-Demand Webinars Webinar (2015-04): Emerging Industrial Stormwater General Permit Requirements: Practical Strategies for Meeting Increased Compliance Demands  National
On-Demand Webinars Webinar (2016-03): Stormwater Management for Changing Weather: Learn the Top Compliance Strategies for Confronting Seasonal and Episodic Weather Events  National
Speaker's Notes Webinar (2017-11): Stormwater Management Programs: How to Integrate New Technologies to Improve Processes and Operations  National
On-Demand Webinars Webinar (2017-11): Stormwater Management Programs: How to Integrate New Technologies to Improve Processes and Operations  National
Speaker's Notes Webinar [2019-01]: Stormwater Management: Solving BMP Maintenance Challenges in the Private Sector  National
On-Demand Webinars Webinar [2019-01]: Stormwater Management: Solving BMP Maintenance Challenges in the Private Sector  National
Speaker's Notes Webinar [2021-06]: Preventing Spills: Best Management Practices and Stormwater Control  National