Volunteer monitoring began at Paradise Lake in 1996 and continued through 2008. Sampling will be resumed in 2015. Previous data indicated this lake, whose watershed extends into Snohomish County, was moderately colored and high in primary productivity (eutrophic) with fairly good water quality. Productivity may be decreasing slightly over time, but the trend is poorly correlated.
Profile data show thermal stratification was stable through summer, and sedimentary phosphorus release added significantly to deep water concentrations. Nitrogen to phosphorus ratios in the upper water were often below 20:1, which can favor bluegreens over other algal species.
Paradise Lake has no public access boat launch, but residents should watch the nearshore environment for early infestations of Eurasian milfoil and other 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).