Yellow Lake was monitored in 2003- 2004, when it was discontinued. The data collected indicate that this lake is moderate to highly productive (threshold eutrophic) with good to fair water quality. The monitoring time span was not long enough to look at trends.
The lake was too shallow for profile sampling. Nitrogen to phosphorus ratios were generally above 20:1, which often favors other algae over bluegreens.
Yellow Lake has public access points, but no boat launch. However, lake users should keep a close eye on aquatic plants growing nearshore to catch infestations of Eurasian milfoil, Brazilian elodea or other aquatic noxious weeds.
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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).