Publication Summary

The Washington State Department of Ecology Freshwater Monitoring Unit collected monthly water quality information at 82 stream monitoring stations during Water Year 2004 (October 1, 2003 - September 30, 2004). We also collected 30-minute interval temperature data at 52 sites from June through September 2004.

The principal goals of this ongoing monitoring program are to characterize the rivers and streams of Washington State and to track changes in water quality. This report documents data quality and presents results for Water Year 2004.

The Washington State Department of Ecology (Ecology) collected monthly water quality data at 82 stream monitoring stations during Water Year (WY) 2004 (October 1, 2003 through September 30, 2004). One stream reach was assessed for degradation due to turbidity. We also collected 30-minute interval temperature data at 52 sites from June through September 2004. The principal goals of this ongoing monitoring program are to characterize the rivers and streams of Washington State and to track changes in water quality.

This report is intended to document methods and data quality, and to present the data for WY 2004. A description of Ecology′s long-term monitoring program and access to historical data can be found on Ecology′s Internet web site at http://www.ecy.wa.gov by clicking on "Environmental Info" and then "River and Stream Water Quality" (under the "Watersheds" heading).