Processing math: 100%

Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
GREENWOOD OXFORD 10 1 0.9 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(47 ft) 		6 m
(19 ft) 		68 ha
(168 ac) 		3,918,099 m3
(3,176 ac-ft) 		6 km2
(2.3 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 (μS/cm), pH: pH (standard units)

TP = Total Phosphorus (μg/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 (μg/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
1990 4.9 5.8 6.7 7
1991 4.0 6.2 5 15 4.9 6.4 7.0 5
1992 5.3 6.8 7.1 7.1 7.1 1
1993 4.5 5.6 4 15 5.0 6.1 7.5 5
1995 5.0 6.0 6.4 6
1996 5.0 7.0 5 11 6.1 7.6 9.1 3
1997 5.5 7.2 8.4 5
1998 5.6 6.3 7.0 5
1999 5.0 30 6.7 5 8 4.9 7.5 8.5 4 1.8 1.8 1.8
2000 3.8 5.8 6.5 4
2001 6.1 7.2 8.4 6
2002 5.0 7.1 8 13 5.3 6.5 7.5 5 2.5 2.5 2.5
2003 6.4 7.4 8.1 5
2004 5.5 6.7 4 11 6.4 7.0 7.9 6 3.6 3.6 3.6
2005 6.8 7.3 7.9 5
2006 5.7 6.8 7.3 5
2007 6.8 7 8 6.1 7.2 8.9 7 1.6 1.6 1.6
2008 6.3 7.1 7.8 6
2009 4.3 6.0 7.2 6
2010 4.5 5 15 5.2 6.6 7.6 6 1.8 1.8 1.8
2011 5.7 6.4 7.3 7
2012 5.0 6.2 7.4 6
2013 5.0 5 5.3 5.8 6.6 5
2014 5.9 6.9 7.5 4
2015 6.4 6.7 6.9 3
2016 5.0 32 6.8 5 17 5.5 7.0 8.2 4 1.3 1.3 1.3
2017 5.3 5.9 6.5 5

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
4.9 31 6.3 5.3 13 3.8 6.7 9.1 5 1.3 2.1 3.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1996-08-21
1999-09-08
2002-08-16
2004-09-10
2007-08-30
2010-08-15
2013-08-21
2016-08-11
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.0 8.2 24.0 8.5 28 8.6 21.0 8.1 23.6 8.8 25 8.0 24.2 8.5 25 8.0
1 23.0 8.2 24.0 8.5 27 8.6 20.2 8.2 23.2 8.5 25 8.0 23.2 8.6 25 8.0
2 23.9 8.5 26 8.7 20.4 8.2 22.7 8.6 24 8.0 22.8 8.5 25 8.0
3 22.5 8.3 23.7 8.5 25 9.1 20.3 8.3 22.4 8.6 24 8.0 22.2 8.6 24 8.0
4 22.0 8.3 23.4 8.6 24 9.0 20.2 8.6 21.8 8.7 24 8.0 21.5 8.6 24 8.0
5 21.0 8.2 22.6 8.6 23 9.0 20.1 8.5 21.2 8.7 24 7.9 20.4 8.2 24 7.9
6 18.5 5.6 22.1 8.5 23 8.7 20.1 8.5 20.4 8.7 22 8.2 16.4 4.0 22 8.2
7 16.0 4.6 20.8 7.5 19 9.3 19.9 8.4 17.9 9.4 17 7.3 13.2 2.4 19 8.2
8 12.7 4.5 17.4 7.5 16 7.7 17.6 5.8 13.5 9.7 15 5.3 11.3 2.4 16 5.4
9 10.7 3.7 14.1 6.7 13 4.0 12.7 2.7 10.9 7.1 13 2.4 10.2 2.0 14 2.6
10 9.9 1.2 11.2 2.0 12 1.5 11.0 1.1 9.6 3.3 12 0.2 9.1 0.9 12 0.5
11 9.0 0.0 10.1 0.2 11 0.6 9.8 0.7 9.2 1.9 12 0.2 8.7 0.4 11 0.0
12 9.0 0.0 9.4 0.1 11 0.5 9.1 0.6 8.7 0.1 11 0.1 8.5 0.0 10 0.0
13 8.9 0.0 9.1 0.1 11 0.5 8.8 0.6 11 0.1 8.4 0.0 10 0.0
14 10 0.0

Recent temperature and dissolved oxygen profile plots

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