Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
POLAND ANDROSCOGGIN 5 1 0.85 flushes/yr 306 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
11 m
(35 ft) 		4 m
(13 ft) 		296 ha
(731 ac) 		11,393,922 m3
(9,237 ac-ft) 		16 km2
(6.3 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
1974 4.3 4.3 4.3 1
1975 3.0 4.9 6.1 5
1976 13.0 30 7.5 7 11 3.9 4.4 4.9 4 2.0 3.0 4.0
1977 15 4.1 5.1 5.9 3
1978 9.5 4.4 4.9 5.2 4
1979 4.1 4.8 5.8 5
1980 6.0 40 7.0 34 4.2 5.5 6.5 5 2.8 2.8 2.8
1981 4.6 4.9 5.2 4
1982 3.9 4.3 5.2 5
1983 5.0 11.0 9 4.3 4.9 5.4 7 4.9 4.9 4.9
1984 4.0 4.3 5.2 6 1
1985 4.3 4.8 5.2 7
1986 7.0 35 13.0 17 4.0 4.9 5.6 7
1987 4.6 4.7 5.2 7
1988 4.0 4.9 5.5 6
1989 3.0 4.0 4.6 6
1990 6.3 8.0 11 4.1 4.8 5.7 6
1991 6.5 7.0 8.3 4.0 5.2 6.3 4
1992 6.8 6.9 9.0 4.3 5.7 7.3 3
1993 8.2 6.6 9.0 7 4.7 5.3 5.9 2 6.3 6.3 6.3
1994 4.0 4.8 5.8 6
1995 7.5 6.0 11 5.0 5.4 6.2 6
1996 4.2 4.8 5.9 6
1997 5.2 6.9 10.0 12 3.6 4.6 6.1 6 4.4 7.8 11.1
1998 8.0 48 13.0 12 3.5 4.2 5.0 6 4.7 4.7 4.7
1999 8.5 37 6.8 12.0 10 3.7 4.5 5.9 8 7.1 10.0 12.9
2000 3.3 4.5 5.5 6
2001 7.0 7.1 10.0 13 4.0 5.0 5.9 6 5.0 5.0 5.0
2002 4.0 4.6 5.5 6
2003 7.5 6.8 11.0 13 4.1 4.7 5.2 6 4.5 6.2 8.0
2004 20 13.8 64 6.9 10.0 11 3.8 4.6 5.3 6 6.1 6.1 6.1
2005 25 6.8 57 7.1 7.0 10 3.2 4.3 5.3 6 5.7 5.7 5.7
2006 9.5 7.1 8.0 10 4.0 4.5 5.5 6 5.9 5.9 5.9
2007 4.0 4.6 5.8 7
2008 3.9 4.7 5.4 10
2009 10.0 7.1 10.0 10 3.4 4.3 4.9 7 6.2 6.2 6.2
2010 4.0 4.7 5.6 7
2011 8.0 10.0 15 3.5 4.3 4.8 9 5.1 5.1 5.1
2012 20 8.0 56 7.1 9 3.1 3.9 5.5 8
2013 3.8 4.4 4.9 9
2014 3.8 4.6 5.2 8
2015 8.0 61 7.0 12 4.2 5.0 5.5 7 6.1 6.1 6.1
2016 4.0 4.7 5.7 8
2017 4.2 4.8 5.5 7
2018 15 8.5 72 7.0 7.5 16 3.9 4.8 5.7 7 4.0 4.0 4.0

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
20 8.1 50 6.8 9.3 8 13 3 4.7 7.3 6 2 5.6 13

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-09-04
2017-08-14
2017-08-28
2017-09-10
2018-08-12
2018-08-26
2018-08-29
2018-09-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 27 8.3
1 22 6.4 23 7.5 23 7.5 18 7.9 24 6.3 24 6.4 27 8.3 21 6.4
2 26 8.3
3 25 8.3
4 25 7.8
5 22 6.4 18 7.0 23 7.6 18 7.9 22 4.6 22 5.6 24 7.0 20 6.4
6 23 5.3
7 22 1.9
8 22 4.8 16 2.3 22 1.8 17 6.6 21 1.0 20 1.0 18 0.3 20 2.6
9 16 0.2
10 15 0.2

Most recent temperature and dissolved oxygen profile plots

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