Data, Models, and Other Technical Resources for a Watershed Approach
National Water Information Center (NWIS) provides access to USGS water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, and Puerto Rico.
- What is the condition of our Nation's streams, rivers, and ground water?
- How are these conditions changing over time?
- How do natural features and human activities affect these conditions, and where are those effects most pronounced?
National Wetlands Inventory Center: The National Wetlands Inventory (NWI) of the U.S. Fish and Wildlife Service produces information on the characteristics, extent, and status of the nation's wetlands and deepwater habitats. This database is used by federal, state, and local agencies; academic institutions; the U.S. Congress; and the private sector.
Water Quality Data (WQX): The Water Quality Exchange (WQX) is where partners submit water quality data and the Water Quality Portal is the mechanism to retrieve water monitoring data from EPA. Water quality, biological, and physical data is used by state environmental agencies, EPA and other federal agencies, universities, private citizens, and many others.
Hows My Waterway - as designed to provide the general public with information about the condition of their local waters based on data that states, federal, tribal, local agencies and others have provided to EPA.
Water Quality Reporting Database (ATTAINS): This database displays the most current available information provided by the states in their biennial integrated water quality assessment reports prepared under sections 305(b) and 303(d) of the Clean Water Act.
Water Use Data: The U.S. Geological Survey has put this site together to offer real-time water data, a suspended sediment database, maps, and GIS data for water resources.
Watershed Assessment, Tracking & Environmental Results (WATERS) is an EPA integrated information system for the nation's surface waters. This framework allows you to access data regarding water quality, permitting, safe drinking water, and nonpoint source pollution.
Spreadsheet Tool for Estimating Pollutant Load (STEPL) employs simple algorithms to calculate nutrient and sediment loads from different land uses and the load reductions that would result from the implementation of various best management practices (BMPs).
The Region 5 Model is an Excel workbook that provides a gross estimate of sediment and nutrient load reductions from the implementation of agricultural and urban BMPs.
Recovery Potential Screening (RPS) Tool - The RPS provides a systematic approach for comparing watersheds, their condition and how well they may respond to restoration or protection efforts.
- Better Assessment Science Indicating Point and Nonpoint Sources (BASINS),
- Storm Water Management Model (SWMM) and
- Water Quality Analysis Simulation Program (WASP).
Mid-Atlantic Nonpoint Source Watershed Implementation Tracking - This map displays state nonpoint source (NPS) management plans, the annual reports of the state nonpoint source work as well as the watershed implementation plans and NPS progress reports for the mid-Atlantic states.
These technical memoranda assist organizations conducting watershed projects, particularly those projects that address nonpoint sources of pollution. Many of the lessons learned from the Clean Water Act Section 319 National Nonpoint Source Monitoring Program are incorporated in these publications.
- Technical Memorandum #1 Adjusting for Depreciation of Land Treatment When Planning Watershed Projects (pdf)
- Technical Memorandum #2 Relative Applicability of Particle Distribution Measures and Bank Slope Stability in Evaluating NPS Watershed Projects (pdf)
- Technical Memorandum #3 Minimum Detectable Change and Power Analysis (pdf)
- Technical Memorandum #4 Applying Benthic Macroinvertebrate Multimetric Indexes to Stream Condition Assessments (pdf)
- Technical Memorandum #5 Presenting Results (pdf)