River & stream water quality monitoring

• See the Freshwater information network application for data.
• Using river & stream water quality data describes how to download and read the information we collect.
• Monitoring methods for rivers & streams explains how we collect water quality data.
• Data quality assurance for rivers and streams discusses how accurate our information is and what lengths we go to to make certain it's accurate.
• The Water Quality Index for rivers & streams summarizes and presents water quality data in a simple color-coded format.
• Water quality monitoring contacts can direct you to a stream scientist in your area.

Each water year, from Oct. 1 through Sept. 30 of the following year, our freshwater scientists create a water quality annual report, summarizing that year's data.

• Rivers and Streams – Annual Water Quality Reports links to an index of the freshwater quality annual reports.
• Rivers and Streams links to general Ecology publications that address rivers and streams.