Data and Tools
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DFLOW
A page containing the basic information and resources for DFLOW 3.1, a Windows-based tool developed to estimate user selected design stream flows for low flow analysis and water quality standards.
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Applications and Uses for DFLOW
This page talks about a DFLOW case study and the ability of the EPA and states to evaluate alternative flow statistics.
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HAWQS (Hydrologic and Water Quality System)
A water quantity and quality modeling system to evaluate the impacts of management alternatives, pollution control scenarios, and climate change scenarios on the quantity and quality of water at a national scale.
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Definition and Characteristics of Low Flows from DFLOW
This page provides background information on the definition and characteristics of low flows, the relationship between low flows and aquatic life criteria and design flows.
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Safe Drinking Water Information System
This page contains basic information, links, and tools related to the safe drinking water information system.
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BenMAP Manual and Supporting Documentation
Read the user manuals and appendices for web-based BenMAP to find an overview of the program, installation instruction and answers to frequently asked questions.
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E-FAST - Exposure and Fate Assessment Screening Tool 2014 Documentation Manual
E-FAST 2014 Documentation Manual
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Wildfire Smoke Course Knowledge Check - Question 6
Knowledge check on the relationship between mental health and exposure to wildfire smoke
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2025 Ozone Exceedances
View 2025 Ozone Exceedances for New England.
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Wildfire Smoke Course Knowledge Check - Question 16
Knowledge check on preparing for wildfire smoke
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Wildfire Smoke Course Knowledge Check - Question 20
Knowledge check on reducing exposure to wildfire smoke
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Wildfire Smoke Course Knowledge Check - Questions 17-19
Knowledge check on respirators and wildfire smoke
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Wildfire Smoke Course Knowledge Check - Questions 11-12
Knowledge Check on Educating Health Care Workers on Wildfire Smoke Health Effects
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Wildfire Smoke Course Knowledge Check - Question 10
Knowledge Check regarding the effects of wildfire smoke combined with heat.
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Wildfire Smoke Course Knowledge Check - Questions 7-9
Knowledge Check on Exposure to Wildfire Smoke
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Clean Watersheds Needs Survey (CWNS) 2004 Data Dictionary
The Data Dictionary provides definitions of data elements available in the CWNS summary reports, detailed reports, and Access database.
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Clean Watersheds Needs Survey (CWNS) 2000 Data Dictionary
The Data Dictionary provides definitions of data elements available in the CWNS summary reports, detailed reports, and Access database.
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Clean Watersheds Needs Survey (CWNS) 2008 Data Dictionary
The Data Dictionary provides definitions of data elements available in the CWNS summary reports, detailed reports, and Access database.
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SW-846 Method Style Guide
This style guide is for use by developers of new methods for SW-846 and editors of existing SW-846 methods. Its use will help assure consistent method format and minimize editorial errors during the development and maintenance of SW-846.
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NHDPlusV1 New England Data
NHDPlus Version 1 data for the New England vector processing unit.