Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
MOUNT VERNON KENNEBEC 12 1 2.32 flushes/yr 316 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
11 m
(36 ft) 		5 m
(16 ft) 		9 ha
(22 ac) 		447,160 m3
(363 ac-ft) 		2 km2
(0.8 mi2)

Secchi Disk Transparency Graphs

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

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
2002 31 3.1 3.4 3.8 2
2009 16 13 4.1 4.1 4.1 1
2010 14 10 210 6.2 6.2 6.2 1 1.6 1.6 1.6
2011 12 10 260 4.8 4.8 4.8 1 4.2 4.2 4.2
2012 14 10 150 4.5 4.5 4.5 1 6.1 6.1 6.1
2013 16 15 5.0 5.0 5.0 1 5.3 5.3 5.3
2014 14 9 5.1 5.1 5.1 1 5.8 5.8 5.8
2015 16 6 110 5.2 5.2 5.2 1 4.6 4.6 4.6
2016 18 8 160 6.6 6.6 6.6 1 2.7 2.7 2.7
2017 16 8 120 5.4 5.4 5.5 1 2.4 2.4 2.4
2018 32 15 49 7.2 8 95 5.1 5.2 5.2 1 4.0 4.0 4.0

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
32 15 40 7.2 9.7 158 3.1 5.1 6.6 1.1 1.6 4.1 6.1

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-08-31
2012-09-06
2013-08-22
2014-08-26
2015-08-17
2016-08-23
2017-08-22
2018-08-30
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22.3 8.2 22.1 8.4 25.6 8.2 25.3 7.9 27.6 7.8 24.4 7.8 24.1 8.4 26.1 7.8
1 21.5 8.5 21.1 8.4 23.0 8.5 22.8 8.0 25.2 8.0 24.3 7.7 23.8 8.4 25.8 8.0
2 21.1 8.1 20.8 8.3 19.9 6.6 19.9 7.6 23.6 8.0 23.4 7.7 22.8 8.2 24.4 8.2
3 20.3 7.2 19.9 6.1 17.4 6.0 17.2 7.0 20.5 9.2 23.2 7.6 20.8 9.6 22.9 8.1
4 14.8 5.1 13.1 3.0 12.7 2.1 13.0 7.7 14.4 6.1 17.1 4.0 14.3 9.2 16.9 10.6
5 9.6 0.5 9.5 0.9 9.4 0.3 9.0 0.5 9.9 0.5 12.9 1.2 9.6 2.0 10.8 2.7
6 7.3 0.4 7.8 0.3 7.6 0.3 7.3 0.6 8.1 0.3 9.4 0.6 7.1 0.2 7.7 0.4
7 6.1 0.4 6.9 0.3 6.6 0.2 6.4 0.5 7.0 0.4 7.5 0.4 6.3 0.2 6.4 0.4
8 5.5 0.4 6.4 0.3 6.2 0.2 6.0 0.5 6.6 0.3 6.8 0.4 5.8 0.2 5.7 0.4
9 5.2 0.4 6.3 0.2 5.9 0.2 5.8 0.5 6.3 0.4 6.5 0.4 5.6 0.2 5.4 0.5
10 5.1 0.4 6.2 0.2 5.8 0.2 5.7 0.5 6.3 0.4 6.5 0.4 5.6 0.1

Most recent temperature and dissolved oxygen profile plots

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