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Nonpoint Source (NPS) – Encyclopedia

The NPS Encyclopedia is a free on-line reference guide (guide) designed to facilitate a basic understanding of nonpoint source (NPS) pollution control and to provide quick access to essential information from a variety of sources by providing direct hyperlinks to resources available on the World Wide Web. The purpose of this on-line resource guide is to support the implementation and development of NPS total maximum daily loads and watershed (action) plans with a goal of protecting high-quality waters and restoring impaired waters.

This guide is not directly applicable to any point-source dischargers that are regulated under the Clean Water Act, including activities or facilities that are under a National Pollutant Discharge Elimination System permit (e.g., Municipal Stormwater permit, and confined animal facilities that are Concentrated Animal Feeding Operations).

How To Use This Site

The home page for the NPS Encyclopedia contains a description on how to use the guide, its purpose, and an index of each land use category; applicable and relevant federal, state and local laws, policies and ordinances; and general resources (both technical and financial).

The guide is organized around the six land-use categories:

  1. Agriculture
  2. Forestry
  3. Urban
  4. Marinas and recreational boating
  5. Hydromodification
  6. Wetlands, riparian, and vegetated treatment systems

Each land-use category web page contains an index of relevant management measures, general technical and financial resources, programs, and references. Each management measure web page describes the management measure in detail, lists each relevant management practice, provides specific (technical and financial) resources, and describes relevant programs (if not listed in the overarching land-use category page) and references.

0  NPS Encyclopedia Homepage

  • 0A
Relevant federal and state laws and policies, and local ordinances
  • 0B
General Resources
  • 0C
List of Acronyms

1  Agriculture Homepage

  • 1A
Erosion and Sediment Control
  • 1B
Animal Waste
  • 1C
Nutrient Management
  • 1D
Pest and Weed Management
  • 1E
Grazing Management
  • 1F
Irrigation Water Management
  • 1G
Groundwater Protection (draft)
  • 1H
Education and Outreach

2  Forestry Homepage

  • 2A
Preharvest Planning
  • 2B
Streamside Management Areas (SMAs)
  • 2C
Road Construction and Reconstruction
  • 2D
Road Management
  • 2E
Timber Harvesting
  • 2F
Site Preparation and Forest Regeneration
  • 2G
Fire Management
  • 2H
Revegetation of Disturbed Areas
  • 2I
Chemical Management
  • 2J
Wetlands Forest Management
  • 2K
Postharvest Evaluation
  • 2L
Education and Outreach

3  Urban Areas Homepage (newly reorganized)

           3.1 Planning and Design

  • 3.1A
Watershed and Groundwater Protection
  • 3.1B
Flood Control (draft)
  • 3.1C
Impervious Surfaces (draft)
  • 3.1D
Landscaping (draft)
  • 3.1E
Land Development (includes transportation infrastructure)

           3.2 Construction Practices (includes construction of transportation infrastructure)

  • 3.2A
  • 3.2B
Groundskeeping/Chemical Control
  • 3.2C
Onsite Wastewater Treatment Systems
  • 3.2D
Grading/Excavation (draft)

           3.3 Education and Outreach

  • 3.3
For Urban Areas

4  Marinas and Recreational Boating Homepage

           4.1 Marina Siting and Design

  • 4.1A
Flushing Management
  • 4.1B
Habitat Assessment
  • 4.1C
Water Quality Assessment
  • 4.1D
Shoreline Stabilization
  • 4.1E
Storm Water Runoff
  • 4.1F
Fueling Station Management
  • 4.1G
Sewage Facilities
  • 4.1H
Waste Management Facilities

           4.2 Operations and Maintenance

  • 4.2A
Solid (Including Fish) Waste Control
  • 4.2B
Liquid Waste (Including Gray Water) Management
  • 4.2C
Fuel and Used Oil Control
  • 4.2D
Topside Boat Cleaning and Maintenance
  • 4.2E
Underwater Boat Hull Cleaning and Maintenance (draft)
  • 4.2F
Sewage Pumpout Facilities and Marine Sanitation Devices
  • 4.2G
Boat Operation
  • 4.2H
Aquatic Invasive Species Control (draft)
  • 4.2I
Hazardous Material Management and Emergency Response Plans (draft)

           4.3 Education and Outreach

  • 4.3A
For Boaters
  • 4.3B
For Marinas (draft)

5  Hydromodification Homepage (newly reorganized)

           5.1 Stream Channel Modification

  • 5.1A
Channelization and Channel Modification
  • 5.1B
Dams and Levees, Construction
  • 5.1C
Dams and Levees, Operation & Maintenance
  • 5.1D
Dams and Levees, Removal

           5.2 Managing Hydromodification Impacts

  • 5.2A
Streambank and Shoreline Erosion
  • 5.2B
Flow and Temperature Maintenance
  • 5.2C
Low Impact Development

           5.3 Education and Outreach

  • 5.3
For Hydromodification

6  Wetlands and Vegetated Treatment Systems Homepage

  • 6A
Protection and Conservation
  • 6B  
Restoration, Rehabilitation, and Mitigation
  • 6C
Vegetated Treatment Systems
  • 6D
Education and Outreach