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Lake Information Page

Panther-1 Lake

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Vital Statistics

Watershed Area acres
Lake surface area acres
Maximum depth feet
Mean depth feet
Public Park No
Boat Ramp
Fish Present

Overview

Please see Panther-2 for the full description of this lake. Panther Lake data were collected using two different locator IDs. We are not sure if those were from the same location, and it may not be advisable to combine them for trend analyses. Until we can figure out more, we are keeping those datasets separate and calling them Panther-1 and Panther-2.

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Maps

Bathymetry map unavailable
Watershed map unavailable

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Water Quality Data  

Through a combination of efforts by volunteer lake monitors and King County staff, data relating to physical, chemical, and biological aspects of the lake have been collected for most lakes. The King County Lake Stewardship Program analyzes data to track long-term water quality trends in small lakes in western King County.

View or Download Data
Use this tool to view or download data from the lake in tabular format. You can define date ranges and select which parameters to view or download.

Chart Data
Use the charting tool to look at graphs showing single parameters for a single water year at a time.

Water quality over time
A common method of tracking water quality trends in lakes is by calculating the “trophic state index” (TSI) (Carlson, 1977) and testing the values for positive or negative trends over time. TSI indicators predict the biological productivity of the lake based on water clarity (Secchi) and concentrations of total phosphorus (TP) and chlorophyll a (Chlor). Generally at least 8 years of data without major lake management activities are needed to have confidence in a significant trend.

The average of these three TSI indicators during the growing season can be used to place lakes in one of three broad categories:
<40 = oligotrophic (low productivity),
40 to 50 = mesotrophic (moderate productivity)
>50 = eutrophic (highly productive).

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Reports and Related Links



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For questions about lakes in King County, please contact lakes@kingcounty.gov or call the Water and Land Resources Division front desk at 206-477-4800.