Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEXTER PENOBSCOT 32 1 1.63 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
16 m
(52 ft) 		4 m
(13 ft) 		36 ha
(89 ac) 		1,393,717 m3
(1,130 ac-ft) 		4 km2
(1.6 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
1980 21 2.4 4.5 5.6 6
1981 10 4.7 5.8 7.4 6 0.7 1.7 3.2
1988 4.9 5.8 7.1 3
1991 62 119 8.0 14 80 4.9 5.4 6.0 2 2.3 2.3 2.3
1996 62 165 10 191 6.2 6.2 6.2 1 2.0 2.0 2.0
1998 4.7 5.7 6.6 3
1999 4.9 6.0 6.7 5
2001 16 190 8.1 7 54 6.1 6.1 6.1 1 4.0 4.0 4.0
2005 5.3 5.8 6.2 3
2006 8 67 157 8.2 10 36 2.9 5.3 7.4 5 3.4 3.4 3.4
2007 4.1 5.9 7.0 7
2008 4.4 5.2 6.2 7
2009 3.3 5.2 6.3 6
2010 4.5 6.6 7.3 6
2011 6 23 4.4 6.0 7.2 6 1.8 1.8 1.8
2012 4.2 4.6 4.8 2
2013 9.2 9.4 9.6 1
2014 6.5 6.6 6.6 1
2015 7 70 141 7.9 7 20 8.1 8.1 8.1 1 3.2 3.2 3.2

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
7.5 56 154 8 11 67 2.4 6 9.7 3.8 0.7 2.6 4

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1991-08-27
1996-08-15
2001-08-15
2006-08-10
2011-08-23
2015-08-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21.0 8.7 23.9 8.9 25.8 7.6 23.7 8.4 23.7 7.7 24.4 7.8
1 21.0 8.7 23.8 9.0 25.2 7.7 23.9 8.4 23.7 7.7 24.4 7.8
2 21.0 8.6 23.2 9.0 25.0 7.7 24.0 8.3 23.7 7.7 24.4 7.8
3 21.0 8.5 23.0 9.0 24.8 7.7 24.0 8.1 23.7 7.7 24.4 7.3
4 21.0 8.5 21.8 9.5 24.4 7.5 23.7 7.5 23.4 7.6 24.0 7.5
5 20.2 7.3 17.7 9.2 17.3 9.7 19.8 5.2 19.2 7.1 21.6 8.2
6 16.0 8.0 13.9 8.3 12.3 7.4 17.1 1.4 14.2 3.1 17.9 8.6
7 11.8 5.4 10.7 3.5 9.1 5.6 14.0 0.7 11.2 1.2 13.6 3.1
8 9.2 1.7 8.8 0.5 7.2 3.0 11.7 0.3 8.1 0.9 10.9 0.8
9 7.4 0.7 7.3 0.4 6.0 1.1 10.5 0.3 6.7 0.8 9.5 0.6
10 7.0 0.5 6.8 0.2 5.5 0.8 9.7 0.3 6.4 0.5 8.4 0.4
11 7.0 0.5 6.2 0.1 5.4 0.7 9.2 0.2 6.2 0.4 8.0 0.3
12 6.9 0.5 6.1 0.1 5.3 0.7 9.0 0.2 6.1 0.4 7.8 0.3
13 6.6 0.5 6.0 0.1 5.2 0.7 8.9 0.2 6.0 0.4 7.7 0.3
14 6.5 0.5 5.9 0.1 5.2 0.7 7.6 0.3
15 6.5 0.4 5.9 0.1

Recent temperature and dissolved oxygen profile plots

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