Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
UNION KNOX 14 1 3.84 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(57 ft)
5 m
(17 ft)
232 ha
(573 ac)
11,983,210 m3
(9,715 ac-ft)
33 km2
(13 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2017 Secchi Disk Transparency Data"

Water Chemistry and Trophic State Parameters

Table Legend:

Color: Color (SPU), Alk: Alkalinity (mg/l CaCO3), SpCon: Specific Conductivity (\(\mu\)S/cm), pH: pH (standard units)

TP = Total Phosphorus (\(\mu\)g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

SDT = Secchi Disk Transparency (m) – Min: minimum value, Avg: average value, Max: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year

Chl = Chlorophyll-a (\(\mu\)g/L) – Min: minimum value, Avg: average value, Max: maximum value
Year Color Alk SpCon pH TP-EC TP-SG TP-BG TP-PG SDT-Min SDT-Avg SDT-Max SDT-n SDT-b Chl-Min Chl-Avg Chl-Max
1974 45 4.6 5.0 5.5 2
1975 4.9 5.0 5.0 2
1976 5.2 5.2 5.2 1
1980 4.0 5.7 6.6 4
1981 5.8 6.0 6.4 5
1982 4.7 5.2 5.8 5
1983 4.6 5.0 5.6 6
1984 4.9 5.3 5.6 5
1985 4.9 5.3 6.1 7
1986 3.8 4.5 5.3 3
1995 4.4 4.9 5.0 2
1997 4.3 4.9 5.6 4
1998 3.7 4.4 5.2 3
2007 4.9 5.5 6.4 5
2008 5.2 5.6 6.4 4
2010 5.2 5.4 6.0 2
2011 5.2 5.5 5.6 2
2013 4.4 5.1 5.3 4
2014 3.4 4.2 4.8 4
2015 5.3 5.5 5.9 4
2016 4.3 5.0 5.9 7

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color Avg Alk Avg SpCon pH Avg TP-EC Avg TP-SG Avg TP-BG Avg TP-PG SDT-Min SDT-Avg SDT-Max SDT-n Chl-Min Chl-Avg Chl-Max
45 3.4 5.2 6.6 3.9 Inf 1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

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Recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)
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