Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
T05 R01 NBPP PENOBSCOT 35 1 1.05 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
21 m
(70 ft) 		6 m
(20 ft) 		1,546 ha
(3,821 ac) 		96,311,216 m3
(78,081 ac-ft) 		15 km2
(5.8 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
1984 6.5 6.6 6.7 2
1985 5.0 32 5.0 13 5.8 6.3 6.8 3
1990 8.5 20 6.8 6.0 5.3 5.3 5.3 1 2.4 2.4 2.4
1996 6.0 27 7.0 7 7.3 7.3 7.3 1 2.5 2.5 2.5
2005 20 5.9 5.9 5.9 1
2007 5.4 6.3 7.4 2
2008 7.4 7.4 7.4 1
2009 7.6 22 6.1 5.2 6.2 7.3 8.9 4 1.7 2.3 2.9
2010 16 7.2 24 5.2 5.4 6.2 7.2 8.0 5 1.5 2.2 2.7
2011 19 6.8 21 6.9 6.0 5.7 6.6 8.1 8 1.5 2.5 3.4
2012 18 7.2 17 7.0 4.4 5 6.0 7.2 8.1 4 1.8 2.5 3.7
2013 18 7.6 27 7.0 6.3 5.8 7.0 8.2 6 1.3 2.5 4.3
2014 19 7.1 22 7.0 5.3 5.3 7.3 8.4 5 1.8 2.6 5.5
2015 17 7.4 22 7.0 4.8 5.7 7.0 8.2 5 1.4 3.0 6.4
2016 15 7.5 23 6.8 6.7 6.0 7.8 9.0 6 1.6 2.3 5.3
2017 15 7.8 23 7.3 5.4 6.2 7.7 9.1 5 1.8 2.5 4.2

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
17 7.1 23 6.1 5.6 12 10 5.3 6.9 9.1 3.7 1.3 2.5 6.4

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-16
2016-08-04
2016-08-25
2016-09-12
2016-09-20
2017-08-02
2017-08-18
2017-09-22
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.2 26 8.4 23 8.4 22 8.2 20 8.5 24 8.5 22 8.3 20 8.9
1 22 8.2 25 8.4 23 8.4 22 8.2 20 8.5 24 8.5 22 8.3 20 8.9
2 22 8.2 25 8.3 23 8.4 22 8.2 20 8.5 24 8.4 22 8.2 20 8.9
3 21 8.2 25 8.3 23 8.4 22 8.2 20 8.5 23 8.4 22 8.2 20 8.9
4 21 8.1 25 8.3 23 8.3 22 8.2 20 8.5 23 8.4 22 8.1 20 8.8
5 21 8.1 24 8.0 22 8.3 22 8.1 20 8.4 23 8.4 22 8.1 20 8.8
6 21 8.1 23 7.7 22 8.2 22 8.1 20 8.4 22 8.1 22 8.0 20 8.4
7 21 8.1 20 6.2 22 8.1 22 8.0 20 8.4 20 5.7 22 8.0 19 8.3
8 21 8.0 18 4.5 21 5.9 22 7.9 20 8.4 18 3.8 20 5.2 19 8.0
9 20 4.7 17 3.8 19 2.7 20 4.6 20 8.3 16 2.9 17 2.4 19 7.3
10 19 0.9 16 3.2 17 1.6 19 2.4 20 7.0 15 2.4 16 1.4 19 6.9
11 18 0.3 15 2.9 16 1.1 16 0.2 17 0.3 14 2.2 15 1.0 17 4.5
12 16 0.2 15 2.8 15 1.1 15 0.2 15 0.2 14 2.2 14 0.9 15 0.4
13 15 0.2 14 2.6 14 0.9 14 0.2 14 0.2 13 2.0 13 0.8 13 0.3
14 15 0.2 14 2.4 14 0.8 14 0.1 14 0.2 13 1.9 13 0.8 13 0.3
15 14 0.2 14 2.2 14 0.7 14 0.1 14 0.2 13 1.8 13 0.7 13 0.3
16 14 0.2 13 2.0 14 0.6 14 0.1 14 0.1 13 1.7 13 0.7 13 0.3
17 14 0.1 13 1.9 14 0.5 14 0.1 13 0.1 13 1.6 13 0.6 13 0.3
18 14 0.1 13 1.8 13 0.4 14 0.1 13 0.1 13 1.6 13 0.6
19 13 1.2 13 1.6

Recent temperature and dissolved oxygen profile plots

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