Assessed Rivers, Lakes, and Estuaries Meeting All Designated Uses 1994/1996
Source: United States Environmental Protection Agency (EPA)
Map Description:
States and Tribes adopt water quality standards that include designated uses and criteria to protect those uses. Uses typically include drinking water supplies, aquatic life use support, fish and shellfish consumption, primary and secondary contact recreation (e.g., swimming and boating), and agriculture. States and Tribes describe water quality in terms of a waterbody either fully supporting, partially supporting, or not supporting the designated use and report this information biennially to U.S. EPA which then compiles it in the National Water Quality Inventory Report to Congress (305(b)) Report.

Cautions for this Product:
Reported data are based on National guidelines issued from U.S. EPA, but may vary from place to place due to different water quality standards and methods.States and Tribes do not have identical water quality standards or identical methods or criteria to assess their waters so data may not be consistent. Most States and Tribes cannot assess all of their waters during each two-year reporting period, and they may modify techniques used or assess different waters every two years. Most monitoring undertaken by States and Tribes is focused on rivers, lakes and estuaries with suspected or identified pollution problems. Assessments based on this type of monitoring may not be representative of the whole watershed and may overestimate the degree of concern.

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