• Lake Desire continued to have fairly clear water, with high nutrient concentrations and high algal growth.
• Lake Desire continues to have contrasting trends in nitrogen and phosphorus concentrations, which is not common. Nitrogen and chlorophyll-a concentrations have decreased over time, while phosphorus concentrations have increased.
• No algal blooms were reported for toxin testing in 2023.
• Investigate potential nutrient sources leading to increasing phosphorus in the lake.
• Continue to monitor nearshore plants to catch purple loosestrife, a regulated Class B noxious weed that has been identified near Lake Desire. If spotted, notify the King County Noxious Weeds Program.
This bathymetric map shows contour lines of equal depth, similar to a topographic map would for mountains and valleys. The red 'X' marks the location where water quality samples are taken.
This map shows the area of the watershed relative to the area of the lake. Generally speaking, the larger a watershed is relative to a lake, the greater the influence land use practices on lake water quality.
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).
