Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LEEDS ANDROSCOGGIN 12 1 1.55 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(38 ft) 		4 m
(14 ft) 		1,615 ha
(3,992 ac) 		69,982,395 m3
(56,736 ac-ft) 		47 km2
(18 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
1971 4.3 4.9 5.5 2
1972 3.0 4.3 5.8 7.3 2
1973 4.3 4.3 4.3 1
1976 14 4.0 4.5 6.0 6 2.8 3.5 4.1
1977 45 3.9 3.9 3.9 1 3.3 3.3 3.3
1978 9 16.0 3.7 4.3 5.0 6
1979 16 40 13 2.5 3.8 5.3 6 2.9 2.9 2.9
1980 11 46 3.2 4.5 5.8 6 2.7 2.7 2.7
1981 12 38 13 3.5 4.2 5.2 5 1.9 3.0 4.0
1982 3.2 4.5 6.3 5
1983 3.7 4.8 5.4 7
1984 3.3 4.0 4.7 5
1985 10 39 11 4.5 5.2 6.5 4
1986 11 4.9 5.0 5.3 4 1.7 4.4 8.1
1987 3.7 4.0 4.5 3
1988 3.2 4.2 5.3 5
1989 2.1 2.9 3.7 6
1990 3.9 4.8 5.5 4
1991 13 45 7.2 14 2.0 4.0 4.7 5
1992 12 43 7.1 14 3.1 4.4 5.3 6 5.0 5.0 5.0
1993 13 44 7.9 12 3.8 4.4 6.2 7 5.9 5.9 5.9
1994 11 16.8 2.9 4.3 5.2 6 4.2 4.2 4.2
1995 11 12 20.6 2.8 4.9 5.7 7
1996 15 15.8 2.7 3.3 4.4 7 2.4 5.4 10.0
1997 18 18.0 3.3 4.1 5.5 6 1.2 4.7 13.5
1998 18 29.9 2.9 3.4 4.4 8 3.1 6.3 10.0
1999 6 43 20 36.0 1.1 3.6 5.2 6 3.3 9.8 49.0
2000 12 50 17 17.9 2.9 3.7 4.4 7 3.8 21.9 68.0
2001 11 53 7.2 17 21.0 2.5 3.6 4.7 8 5.8 6.8 7.5
2002 24 14 56 17 18.6 3.0 3.5 4.0 6 8.6 8.9 9.3
2003 22 14.4 3.1 4.1 4.8 5
2004 14 16 59 7.1 15 16.0 14.9 3.1 3.6 4.6 5 7.8 7.8 7.8
2005 17 10 55 7.2 14 17.4 2.7 4.0 5.0 5 5.9 5.9 5.9
2006 20 14.7 3.2 4.1 5.4 5
2007 13 12 51 7.3 14 12.6 3.3 4.3 5.7 5 3.8 4.0 4.1
2008 18 11 52 7.0 13 16.6 2.7 3.5 4.8 5 6.1 6.1 6.1
2009 13 3.6 4.1 4.6 5
2010 11.0 4.2 4.6 4.8 4
2011 3.3 4.3 4.8 6
2012 8.2 4.4 4.8 5.4 6
2013 18 13 53 7.3 9 12.8 23 4.1 4.7 5.6 7 3.0 3.0 3.0
2014 20 13 50 7.1 11 8.1 4.6 4.9 5.9 6 4.3 4.3 4.3
2015 4.4 4.8 5.1 6
2016 2.6 4.6 5.5 8
2017 12 3.9 4.8 5.4 8 4.4 4.4 4.4

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
18 12 48 7.2 15 11 18 23 1.1 4.3 7.3 5.4 1.2 5.8 68

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-03
2016-08-20
2016-09-12
2016-09-30
2017-08-09
2017-08-27
2017-09-11
2017-09-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 28 7.9 28 8.0 26 7.9 20 9.0 26 8.0 26 8.0 26 8.0 24 8.4
1 28 8.0 28 8.0 26 7.8 20 8.8 26 7.9 26 8.0 26 8.0 24 8.1
2 28 7.7 28 7.6 26 7.1 20 8.4 26 7.9 26 7.8 20 7.8 23 8.0
3 27 7.7 28 7.4 26 7.1 18 8.0 26 7.8 26 7.7 25 7.7 22 8.0
4 27 7.3 26 7.0 25 6.8 18 7.7 26 7.4 26 7.4 24 7.1 21 7.8
5 23 6.5 26 4.7 20 6.5 18 7.7 25 7.3 25 7.4 14 4.2 20 7.5
6 18 6.2 20 4.2 17 0.4 15 4.1 18 5.1 24 6.5 14 4.1 20 7.5
7 18 0.7 18 0.4 13 0.4 18 1.3 20 1.1 14 1.3 18 6.1
8 17 1.1

Recent temperature and dissolved oxygen profile plots

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