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Lake Joy
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Welcome
Wilderness
Yellow
Watershed Area
468 acres
Lake surface area
105 acres
Maximum depth
50 feet
Mean depth
23 feet
Public Park
N
Boat Ramp
No, no gas engines
Fish Present
Not Available
Volunteer monitoring began at Lake Joy in 2000 and continued through 2008, after which it was discontinued. The data indicated that this lake was lightly colored and low to moderate in primary productivity (oligotrophic - mesotrophic), with excellent to good water quality that remained steady over time.
Profile data suggested that thermal stratification was stable through summer, and sediments released some phosphorus to the deep water. Nitrogen to phosphorus ratios were nearly always above 20:1, which generally favors other algae species over bluegreens.
Lake Joy has only a walk-in public access point, but residents and lake users should keep an eye on aquatic plants growing nearshore to catch early infestations of noxious weeds such as Eurasian watermilfoil and fragrant waterlily.
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This bathymetric map shows contour lines of equal depth, similar to a topographic map would for mountains and valleys
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
Click image to enlarge
Back to top View or Download Data Use this tool to view or download data from the lake in tabular format. You can
define date ranges and select which parameters to view or download. Chart Data Use the charting tool to look at graphs showing single parameters for a single
water year at a time. Five year water quality trends
A common method of tracking water quality trends in lakes is by calculating
the “trophic state index” (TSI) (Carlson, 1977). TSI indicators predict the biological
productivity of the lake based on water clarity (Secchi) and concentrations of total
phosphorus (TP) and chlorophyll a (Chlor).
The average of these three TSI indicators during the growing season can be used
to place lakes in one of three broad categories:
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