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Title

Washington State Dissolved Oxygen Standard: A Review and Discussion of Freshwater Intragravel Criteria Development

 
Publication number Date Published
09-03-039September 2009
VIEW NOW Washington State Dissolved Oxygen Standard: A Review and Discussion of Freshwater Intragravel Criteria Development (Number of pages: 77) (Publication Size: 2MB)




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Author(s) Brown, C. and D. Hallock
Description This document presents scientific and policy information about intragravel dissolved oxygen (IGDO) criteria development. In 2006, EPA issued a Clean Water Act approval of Washington’s 2006 revision to the surface water quality standards. The approval required an Endangered Species Act condition to review the freshwater dissolved oxygen (DO) criteria. This document partially fulfills that condition and contains information on (1) the relationship between DO concentration and saturation, (2) an analysis of the Department of Ecology’s ambient DO monitoring data, (3) the environmental factors that contribute to IGDO conditions, and (4) freshwater DO criteria developed by Pacific Northwest states and tribes.
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Keywords intergravel, inter-gravel, intragravel, intra-gravel, IGDO, Endangered Species Act, recommendations, criteria, surface water, gravel, Pacific Northwest, water quality, Ecology, standards, water quality standards, tribe, salmon spawning, freshwater, dissolved oxygen, Environmental Protection Agency, clean water act, aquatic