Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MOUNT VERNON KENNEBEC 12 1 3.43 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
5 m
(17 ft) 		2 m
(6 ft) 		26 ha
(64 ac) 		449,724 m3
(365 ac-ft) 		3 km2
(1.1 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
1994 3.1 3.1 3.1 1
1995 4.0 4.0 4.0 1
1997 3.2 3.2 3.2 1
1998 2.3 3.5 4.5 3
1999 3.0 3.0 3.0 1
2000 3.2 4.0 5.0 3
2001 2.3 2.8 3.3 2
2003 11 22 78 16 4.5 4.5 4.5 1
2006 2.7 3.6 4.1 3
2007 15 19 63 7.6 21 25 2.2 3.2 4.6 5 6.7 6.7 6.7
2008 2.2 2.9 3.5 2
2013 2.8 3.9 4.8 8
2014 2.4 3.6 5.7 6 1
2015 12 23 72 7.3 16 3.6 5.0 5.6 6 1 1.2 1.2 1.2
2016 3.7 4.8 5.8 7 1
2017 3.8 4.6 5.3 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
13 21 71 7.4 18 25 2.2 3.7 5.8 3.6 1.2 4 6.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2007-08-09
2015-08-12
Depth (m) TEMP DO TEMP DO
0 24 7.7 24 8.2
1 24 7.7 24 8.2
2 24 7.6 23 8.0
3 24 7.6 23 7.8
4 19 1.7 22 8.6
5 16 0.5 18 0.7

Recent temperature and dissolved oxygen profile plots

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