Profile Picture Markus.Von Prause@ecy.wa.gov

created Apr 23 2014

updated May 1 2014

Description

Routine freshwater monitoring data collected by the The WA State Department of Ecology's River and Stream Monitoring Program are summarized by a technique called the "Water Quality Index" (WQI). The WQI ranges from 1 (poor quality) to 100 (good quality). The WQI summary does not include non-standard elements like metals. For temperature, pH, oxygen, and fecal coliform bacteria, the WQI is based on criteria in Washington’s Water Quality Standards, WAC 173-201A.
For nutrient and sediment measures where standards are not specific, results are based on expected conditions in a given region. Multiple constituents are combined and results aggregated over time to produce a single score for each station and each year.

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water quality index, washington state river and stream fresh water quality, ecology
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Markus Von Prause, WA State Department of Ecology's River and Stream Monitoring Program
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http://www.ecy.wa.gov/programs/eap/fw_riv/rv_main.html
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