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United States Environmental Protection Agency
Water Science
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Water Quality Tools

  • DFLOW: A Tool for Low Flow Analysis
    This website contains a link to download DFLOW 3.0, a tool to calculate design flow statistics. It also includes several pages explaining how to use the tool and provides detailed background information.
  • Analytical Methods
    Methods used by industries and municipalities to analyze the chemical and biological components of wastewater, drinking water, sediment, and other environmental samples.
  • Water Quality Models
    Tools for simulating the movement of precipitation and pollutants into receiving waters.
  • Economics & Benefits
    Estimating the benefits of EPA water quality programs.
  • Training
    Lists training opportunities in the Office of Water.
  • Mercury Maps: A Quantitative Spatial Link Between Air Deposition and Fish Tissue
    Mercury Maps is a tool that relates changes in mercury air deposition rates to changes in mercury fish tissue concentrations, on a national scale. Mercury Maps can be used to help evaluate the benefits of technology-based air emission reduction standards or to perform Total Maximum Daily Load (TMDL) analyses for individual or multiple watersheds.
  • Allocating Loads and Wasteloads
    Use this tool forTMDL development.
  • National Fish Tissue Study
    EPA is conducting a screening-level study to estimate the national distribution of selected persistent, bioaccumulative and toxic chemical residues in fish tissue from lakes and reservoirs of the continental United States.

 

Wastewater Management | Drinking Water | Wetlands, Oceans, and Watersheds

 
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