Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
POLAND ANDROSCOGGIN 5 1 3.83 flushes/yr 306 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(41 ft) 		4 m
(13 ft) 		118 ha
(291 ac) 		4,832,601 m3
(3,918 ac-ft) 		9 km2
(3.5 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
1980 5.3 6.2 6.5 4
1981 13 35 15.0 18.0 6.1 6.1 6.1 1 2.9 2.9 2.9
1993 12 6.4 7.5 18.0 5.5 6.0 6.6 2 6.5 6.5 6.5
1996 12 51 9.0 14.0 6.8 6.8 6.8 1 2.0 2.0 2.0
1999 10 54 6.0 7.5 6.3 6.7 7.2 3 3.9 3.9 3.9
2000 5.8 6.5 7.4 6
2001 6.1 6.7 7.4 6
2002 6.8 7.0 7.4 5
2003 12 7.0 6.0 6.2 7.2 8.3 6 3.8 3.8 3.8
2004 12 6.9 6.0 16.0 6.4 7.7 9.3 7 2.9 3.3 3.7
2005 12 56 6.7 9.0 10.0 5.8 6.7 7.8 6 3.5 4.4 5.3
2006 14 7.3 7.5 11.0 5.2 6.8 7.8 9 3.3 4.2 5.2
2007 13 6.9 7.0 15.0 6.3 7.0 7.6 7 3.2 3.5 3.9
2008 7.0 7.0 12.0 6.4 7.2 7.9 6 2.6 3.0 3.3
2009 6.0 6.7 7.4 8.2 7 3.5 3.5 3.5
2010 6.0 11.0 6.0 7.2 8.3 6 3.3 3.3 3.3
2011 14 79 6.0 12.0 5.6 6.8 7.5 6 3.9 3.9 3.9
2012 13 8.0 11.0 5.8 6.8 7.4 6 5.1 5.1 5.1
2013 6.0 11.0 6.4 7.3 9.4 7 2.6 2.6 2.6
2014 14 64 5.0 10.0 5.7 7.1 8.3 5 3.6 3.6 3.6
2015 15 67 7.0 11.0 6.7 7.1 7.2 5 4.0 4.0 4.0
2016 14 76 7.4 5.5 15.0 6.3 7.2 9.2 8 2.2 2.8 3.4
2017 13 82 7.3 6.0 18.0 6.1 7.2 8.4 6 2.7 2.8 2.9
2018 8 14 90 7.3 6.5 10.0 6.4 7.1 8.1 5 3.0 3.0 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 65 6.9 7.1 13 5.2 6.9 9.4 5.4 2 3.6 6.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-08-05
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 24.1 8.2 25.5 8.3 25.5 8.4 25.5 8.4 27.2 7.9 21.2 8.9 27.2 8.0 26.4 8.1
1 24.1 8.2 24.9 8.4 25.4 8.4 25.4 8.4 26.3 7.9 20.7 8.8 27.1 8.0 26.1 8.4
2 24.1 8.2 24.4 8.3 24.9 8.3 25.2 8.4 25.6 7.8 20.3 8.8 26.4 7.9 25.5 8.3
3 24.0 8.2 24.3 8.3 24.7 8.3 24.9 8.4 24.8 8.0 20.1 8.8 26.4 7.9 25.3 8.2
4 24.0 8.2 24.1 8.2 24.4 8.2 24.3 8.2 23.6 8.6 19.8 8.7 26.3 7.9 24.7 8.2
5 23.6 8.2 20.5 8.5 22.5 9.3 24.1 8.1 17.0 12.3 19.4 8.5 22.5 8.7 23.6 8.0
6 17.8 8.3 15.1 7.4 17.1 8.7 23.1 7.4 12.7 8.2 18.7 7.7 16.7 9.5 19.6 8.5
7 15.0 6.0 13.1 5.5 14.4 6.9 19.6 4.5 11.3 5.1 15.0 3.2 13.6 7.8 15.4 6.1
8 13.2 2.8 11.6 3.7 12.8 4.5 16.6 1.1 10.4 2.4 12.1 0.3 11.4 3.6 12.5 1.0
9 12.4 2.6 11.0 3.6 11.9 4.1 14.7 0.3 9.8 1.9 11.0 0.1 10.2 3.3 11.0 0.8
10 11.0 1.5 9.8 3.2 10.5 3.2 12.4 0.2 9.1 0.3 9.6 0.1 9.2 1.9 9.8 0.2
11 10.4 0.3 9.1 1.8 9.7 1.0 10.6 0.2 8.3 0.1 8.9 0.1 8.6 0.3 9.1 0.1
12 9.9 0.0 8.6 0.2 9.1 0.0 9.4 0.3 7.9 0.1 8.3 0.1 8.2 0.1 8.3 0.1
13 9.6 0.0 8.2 0.1 8.8 0.0 8.7 0.0 7.7 0.1 8.0 0.1 7.9 0.1 8.1 0.1
14 8.0 0.0 8.7 0.0 7.7 0.1

Most recent temperature and dissolved oxygen profile plots

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