Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
GREENE ANDROSCOGGIN 12 1 1.52 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(19 ft) 		3 m
(11 ft) 		796 ha
(1,966 ac) 		27,061,084 m3
(21,939 ac-ft) 		66 km2
(25 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
1977 47 58 71 0.80 2.0 3.5 8 4.2 20.7 65
1978 17 79 32 17 21 48 0.90 2.1 3.0 5 4.9 24.9 79
1979 15 85 49 0.50 1.5 2.5 10 4.3 44.7 192
1980 18 67 44 41 0.70 1.6 3.8 10 7.3 26.3 100
1981 14 83 42 0.60 1.6 2.8 10 5.6 26.8 118
1982 19 77 100 41 1.00 1.9 2.9 9 2.9 18.5 61
1983 17 58 27 51 1.20 2.0 3.0 7 1 4.6 19.1 69
1984 17 60 44 0.80 1.9 3.4 6 3.3 33.6 134
1985 32 47 0.60 2.0 4.0 6 4.6 29.4 130
1986 24 28 0.80 2.3 3.4 7 2.5 21.2 62
1987 21 75 32 39 1.00 2.0 3.8 7 3.3 21.7 57
1988 30 54 0.50 1.9 3.4 6 4.2 34.7 117
1989 20 60 24 35 1.00 2.2 3.5 6 6.9 22.5 79
1990 47
1993 7.2 42 1.40 1.4 1.4 1 23.3 23.3 23
1994 17 7.2 30 34 38 1.30 2.6 4.7 6
1995 20 6.8 28 1.30 2.7 5.2 6
1996 18 7.9 35 59 1.30 2.5 3.7 5
1997 18 7.2 49 35 0.85 1.9 4.3 7 6.0 29.3 49
1998 21 73 7.8 63 0.90 1.9 3.6 7 25.0 47.1 69
1999 18 7.3 41 1.05 2.4 4.8 9 3.2 6.9 11
2000 20 7.2 37 1.25 2.4 5.0 10 2.9 22.3 48
2001 18 78 7.3 47 60 0.70 1.8 4.9 10 1 8.9 36.3 83
2002 19 90 7.5 29 35 0.91 2.6 5.5 11 2 6.9 16.8 44
2003 10 19 96 7.1 31 30 1.38 2.5 5.5 14 3 3.8 13.1 23
2004 15 20 87 7.6 39 0.90 2.5 5.0 14 22.0 35.0 48
2005 14 17 82 7.1 37 0.75 1.9 3.7 13 8.1 32.2 60
2006 20 7.7 55 0.75 1.8 4.9 12 4.6 20.3 50
2007 20 7.1 37 1.00 2.3 4.1 13 7.6 21.4 50
2008 21 20 77 7.1 54 0.90 1.9 5.3 12 2 19.0 34.0 71
2009 7.2 40 53 0.60 2.1 3.7 10 2.6 34.3 100
2010 13 52 0.95 2.3 4.0 8 6.7 21.7 34
2011 13 37 1.15 1.6 2.0 5 12.0 34.8 65
2012 22 23 84 7.8 43 1.05 1.7 3.4 6 6.3 33.1 63
2013 22 48 0.75 1.6 3.4 7 11.0 36.5 56
2014 18 21 80 8.9 52 0.65 1.5 3.0 10 7.7 26.7 94
2015 12 23 88 7.9 32 0.85 2.4 4.2 12 15.2 31.4 50
2016 10 23 93 8.0 43 0.76 2.1 4.2 11 5.5 42.1 72
2017 11 19 99 9.2 55 130 0.95 1.4 1.5 4 15.0 25.2 49

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
14 19 80 7.3 42 37 58 42 0.5 2 5.5 8.4 2.5 28 192

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-10
2015-09-22
2016-08-24
2016-09-01
2016-09-19
2016-09-26
2017-08-28
2017-09-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 10.1 22 9.5 24 10.2 24 10.5 21 10.3 20 12.0 24 12.8 23 8.8
1 25 10.0 22 9.7 24 9.9 24 10.3 21 10.4 18 10.5 23 12.9 22 8.8
2 25 9.9 22 9.2 24 8.5 24 7.5 21 10.0 18 9.3 22 10.6 22 8.8
3 25 9.7 21 9.0 24 7.3 23 8.0 21 9.9 18 9.0 22 9.5 22 8.6
4 24 5.6 21 8.9 23 6.9 23 7.8 21 9.9 18 9.0 22 9.1 20 7.5
5 23 4.6 21 8.8 23 6.5 23 7.3 20 8.9 18 8.6 22 8.7 20 1.7

Recent temperature and dissolved oxygen profile plots

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