Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
POLAND ANDROSCOGGIN 5 1 0.7 flushes/yr 306 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(38 ft) 		6 m
(21 ft) 		136 ha
(336 ac) 		8,716,808 m3
(7,067 ac-ft) 		11 km2
(4.1 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
1979 12.0 50 6.0 6.7 6.7 6.7 1 4.4 4.4 4.4
1980 4.8 5.6 6.5 4
1981 11.0 26 10.0 8 7.0 7.0 7.0 1 3.3 3.3 3.3
1985 10.0 33 5.0 36 6.0 6.0 6.0 1
1989 5.5 5.5 5.5 1
1991 6.3 6.0 14 6.6 6.8 7.0 2
1992 12.3 7.3 8.5 6.5 7.0 7.6 3
1993 13.6 7.2 7.7 12 6.0 6.7 7.9 3 2.4 2.4 2.4
1994 12.0 6.5 8.0 18 5.7 6.3 6.8 3
1995 12.0 7.5 10 7.1 7.4 7.7 2
1996 10.5 7.4 9.0 13 5.2 5.7 6.2 4
1997 9.5 7.1 8.5 14 5.2 6.2 7.2 4 4.3 5.8 7.4
1998 13.0 7.1 11.0 9 3.9 5.5 7.2 6 9.9 9.9 9.9
1999 12.6 49 7.0 7.0 8 5.5 6.5 7.2 4 2.8 3.6 4.4
2000 12.5 7.0 8.5 11 5.3 6.5 7.6 6 2.3 4.4 6.5
2001 11.0 6.9 7.0 5.4 6.5 7.3 3 1.9 2.5 3.2
2002 12.0 7.0 8.0 15 5.8 6.7 7.5 3 3.2 3.7 4.2
2003 12.0 7.1 9.5 6.7 6.7 6.8 2 2.5 3.0 3.6
2004 13.0 7.0 7.0 11 6.5 6.6 6.8 2 2.9 3.4 4.0
2005 13.5 52 6.8 8.0 4.1 5.5 6.5 4 3.1 3.5 3.9
2006 14.2 7.4 8.5 12 5.4 5.7 6.0 2 3.7 4.0 4.2
2007 13.0 6.8 5.5 11 6.4 6.4 6.5 2 1.8 2.9 4.0
2008 7.1 5.0 12 5.5 6.8 8.5 6 2.0 2.6 3.3
2009 16.0 5.7 6.3 6.8 5 5.8 5.8 5.8
2010 14.0 4.0 5.7 6.4 6.8 6 2.6 2.6 2.6
2011 13.0 70 7.0 9 6.7 7.1 7.8 2 3.8 3.8 3.8
2012 13.0 6.0 11 5.2 5.7 6.4 5 4.5 4.5 4.5
2013 7.0 12 5.6 6.1 7.2 5
2014 14.0 60 6.0 5.9 6.4 6.8 4 4.1 4.1 4.1
2015 15.0 58 5.0 12 6.2 7.0 7.6 3 3.6 3.6 3.6
2016 8 15.0 65 7.4 7.0 10 6.0 7.1 7.8 5 1.8 2.4 2.9
2017 12.0 73 7.4 7.0 12 6.3 6.6 6.8 2 3.6 3.8 4.0
2018 8 14.0 69 7.4 5.5 12 6.5 6.9 7.3 2 2.0 2.5 3.0

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
8 13 55 7 7.5 13 3.9 6.4 8.5 3.3 1.8 3.9 9.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-08-03
2014-08-09
2015-08-10
2016-08-26
2017-08-02
2017-09-12
2018-08-02
2018-09-05
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.5 8.2 25.1 8.4 25.4 8.2 25 8.4 25.7 8.3 20.4 9.2 26.2 8.1 25.6 8.5
1 24.5 8.2 24.6 8.5 25.1 8.2 25 8.4 25.4 8.4 20.1 9.3 26.3 8.1 25.6 8.5
2 24.3 8.2 24.3 8.5 24.9 8.2 25 8.4 25.1 8.4 20.0 9.3 26.2 8.1 25.5 8.5
3 24.2 8.2 24.3 8.5 24.8 8.2 25 8.3 24.4 8.5 20.0 9.3 26.2 8.1 25.5 8.5
4 24.2 8.2 24.2 8.4 24.7 8.2 25 8.4 24.1 8.3 20.0 9.2 26.1 8.1 24.8 8.5
5 21.9 8.5 22.3 7.9 23.6 8.9 24 8.5 22.3 8.9 19.7 9.1 25.2 7.8 24.2 8.4
6 16.1 8.5 16.7 10.4 18.5 12.2 20 8.8 16.1 11.4 19.4 8.7 16.9 10.3 21.6 8.9
7 12.9 6.1 13.6 9.5 13.7 12.3 15 7.2 11.9 6.6 17.0 6.7 13.0 8.6 14.6 7.3
8 10.8 3.4 11.3 7.9 10.9 8.1 13 4.8 10.3 4.9 12.2 0.1 10.2 6.2 11.5 3.9
9 10.1 2.1 10.1 5.3 9.6 4.9 12 3.1 9.4 2.9 10.4 0.2 9.1 5.2 9.6 1.8
10 9.7 1.4 9.3 3.5 9.0 2.7 11 0.3 8.8 1.8 9.5 0.1 7.9 1.3 8.9 0.8
11 8.9 2.3 8.6 0.7 10 0.2 8.5 0.5 8.8 0.1 7.7 0.5

Most recent temperature and dissolved oxygen profile plots

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