• Lake Desire continued to have fairly clear water, with high nutrient concentrations and high algal growth. • Nitrogen-to-phosphorus (N:P) ratios were below 25 for the entire monitoring season. This indicates the potential for algal blooms to be dominated by cyanobacteria (which have the ability to produce toxins). • An algal bloom was sampled for toxin testing in late September. Toxin testing found elevated microcystin concentrations: 24.1 µg/L, above the Washington State Recreational Guideline of 8.0 µg/L.
Please see below for a link to the full 2020 Lake Desire Monitoring Report.
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).
