Surface Water Report
The City completed a water quality assessment report for fresh water bodies within the City of Shoreline. This report summarizes water quality data collected over an 8 year period between 2002 through 2009. It is intended to establish a water quality baseline that future data can be compared to. Any comparison of future data to the baseline established in this report will help track long-term water quality trends and determine if current programs designed to improve water quality are effective.
A Biological assessment of City streams was conducted in 2003 and 2007. The results were published in a bioassessment report titled Biological and Habitat Assessment of Shoreline Streams.
The biological assessment examined the health of 4 local streams: Thornton, McAleer, Boeing and Storm Creeks, in respect to available habitat, physical features of the stream, the macroinvertebrates (stream insects) present and general water quality. Macroinvertebrates were chosen as an indicator of overall stream health because they are often the “canary in the coal mine” that is most affected by incremental stream changes and are a good indicator of overall stream health. The report indicated that all streams are severely or extremely impacted by urbanization.
The objective of this report was to document current biological and physical conditions in the City’s streams and to help identify any positive or negative trends in ecological health of these streams over time. Future survey results can be compared to this baseline to identify negative or positive trends.
In 2009, the City updated the surface water code for clarity and to comply with the NPDES Western Washington Phase II Municipal Stormwater Permit. This code prohibits non-stormwater discharges to the City’s stormwater system. Some examples of prohibited discharges are: sewage, paint, construction materials, oil, antifreeze, soaps, solvents, detergents, grease and chlorinated water. For a complete list of prohibited discharges please see Shoreline Municipal Code 13.10.320.
To report illegal dumping or spills please call (206) 801-2700.
Collecting water quality samples at Echo Lake
The City implements several programs to monitor the quality of the City’s waters. The City monitors basic water quality in streams year round on a monthly basis. During the summer months, approximately May through September, the City participates in two additional monitoring programs.
- King County Swimming Beach Program - A weekly sampling program that alerts the City to any potential health risks associated with swimming at Echo or Hidden Lakes.
- King County Small Lake Stewardship Program - A bi-weekly program that involves collecting and analyzing water quality at Echo Lake.
In 2013, the City will include toxic algae monitoring through the Small Lake Stewardship Program. Toxic algae testing is designed to alert the City if algae present in Echo Lake is producing microcystin toxins that may be harmful to humans or pets. For more information on toxic algae, visit Ecology's Toxic Algae Monitoring Program page.
For questions regarding water quality, contact Jennifer Adams at (206) 801-2453 or firstname.lastname@example.org.