• Neilson Lake had fairly clear water, with moderate nutrient concentrations and high algal growth.
• No algal blooms were reported for toxin testing in 2023.
• Neilson Lake has experienced considerable variation from year to year. Long-term trends suggest that water quality in Neilson Lake has been declining over time, with increasing phosphorus concentrations, and shallower Secchi depths.
• Investigate potential sources of phosphorus that could be driving increasing trend.
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).
