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National Water Quality Standards Database

Abstract: The National Water Quality Standards Database (WQSDB), is a single point of
access to EPA and state water quality standards (WQS) information. This Web
site provides access to several WQS reports that provide information about
designated uses, waterbody names, state numeric water quality criteria, and EPA
recommended numeric water quality criteria. The WQSDB allows users the ability
to compare WQS information across the nation using standard reports.
Related URL
Description: U.S. Environmental Protection Agency Water Quality Standards Database Home
Geographic Coverage
Spatial coordinates   
  N: 76.63   S: 13.71   E: -61.48   W: -177.1

Data Set Citation
Dataset Originator/Creator: U.S. Environmental Protection Agency
Dataset Title: U.S. EPA Water Quality Standards Database
Dataset Release Date: August 18, 2003
Dataset Release Place: Washington, D.C.
Dataset Publisher: U.S. Environmental Protection Agency
Version: Release 4.0
Data Presentation Form: database
Online Resource:
Temporal Coverage
Start Date: 1970-01-01
Stop Date: 2000-05-30
Access Constraints None
Use Constraints None
Data Set Progress
Data Center
Office of Water, U.S. Environmental Protection Agency Supplemental Info
Data Center URL:

Data Center Personnel
Email: Ost.comments at
Contact Address:
U.S. Environmental Protection Agency
Office of Water
Office of Science and Technology (4301T)
1200 Pennsylvania Avenue, N.W.
City: Washington
Province or State: DC
Postal Code: 20460
Country: USA
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2003-08-29
Last DIF Revision Date: 2017-08-24
Future DIF Review Date: 2004-08-29