Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
GREENWOOD OXFORD 10 1 0.45 flushes/yr 721 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
22 m
(71 ft) 		7 m
(24 ft) 		162 ha
(400 ac) 		11,860,434 m3
(9,615 ac-ft) 		8 km2
(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
1991 4.0 6.3 7 12 5.4 6.8 8.2 1
1992 5 11 8.6 8.6 8.6 1
1995 5.0 3 16 9.5 9.5 9.5 1
1998 6.0 5 6 9.3 9.3 9.3 1 3.4 3.4 3.4
1999 7.1 7.9 8.5 5
2000 5.8 6.9 7.9 9
2001 4.0 7.2 5 7.1 8.6 9.4 7 2.5 2.5 2.5
2002 6.7 7.8 8.9 6
2003 6.9 8.6 9.6 7
2004 4 6.2 7.5 8.5 8
2005 5.5 23 4 5 5.7 7.7 9.2 9 2.6 2.6 2.6
2008 5.0 7.0 5 6.2 7.5 9.3 6 5.8 5.8 5.8
2009 6.6 7.6 9.2 7
2010 7.4 8.1 8.6 7
2011 5.5 4 7.0 8.2 9.3 7 2.0 2.0 2.0
2012 6.7 7.3 8.6 6
2013 6.9 8.1 8.9 8
2014 5.0 28 4 7.1 7.8 8.8 6 2.2 2.2 2.2
2015 6.9 8.2 9.2 8
2016 7.9 8.9 10.5 8
2017 4.0 53 7.0 4 7 5.7 7.8 9.4 8 1.8 1.8 1.8
2018 7.5 8.3 8.9 8

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 35 6.8 4.6 4.5 10 5.4 8 10 6.1 1.8 2.9 5.8

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1995-09-04
1998-09-04
2001-09-03
2005-09-02
2008-08-23
2011-08-20
2014-08-14
2017-08-11
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20.0 8.6 22.0 8.3 22.1 8.5 22.3 8.7 23.3 8.6 23.4 8.2 22.9 8.3 24.7 8.5
1 20.0 8.6 22.0 8.8 21.7 8.5 22.1 8.7 22.3 8.7 23.2 8.3 22.8 8.3 24.0 8.5
2 20.0 8.6 22.0 8.8 21.6 8.5 21.9 8.7 21.6 8.8 23.0 8.3 22.7 8.3 23.8 8.5
3 20.0 8.6 22.0 8.8 21.6 8.5 21.9 8.7 21.4 8.8 22.9 8.3 22.6 8.3 23.7 8.5
4 19.9 8.6 21.8 8.8 21.5 8.5 21.9 9.1 21.2 8.8 22.8 8.3 22.4 8.3 23.5 8.6
5 19.8 8.6 21.8 8.7 21.5 8.5 21.8 9.0 21.0 8.8 22.6 8.3 22.4 8.3 22.6 8.7
6 19.8 8.6 21.7 8.7 21.4 8.5 21.8 9.1 20.8 8.7 22.4 8.3 22.0 8.2 21.4 9.5
7 19.8 8.6 18.0 10.8 21.2 8.5 17.0 12.3 18.7 9.6 18.6 11.7 18.2 9.9 16.2 12.2
8 19.8 8.6 15.1 11.0 19.4 9.6 13.5 11.4 13.1 9.4 14.8 12.6 13.6 11.3 13.1 12.6
9 16.0 10.6 13.0 4.5 13.6 7.8 11.6 9.2 11.4 8.1 10.0 10.5 10.7 9.2 11.6 10.2
10 12.3 10.2 11.0 4.7 11.5 7.6 10.9 8.9 10.0 7.9 9.3 10.0 9.7 9.7 10.6 9.3
11 11.0 8.4 9.8 6.1 9.6 7.6 10.0 8.5 8.9 8.6 8.6 8.9 8.7 9.5 9.8 8.6
12 10.0 7.3 8.8 6.0 7.9 7.3 9.5 8.2 7.9 8.2 8.2 8.2 8.0 9.4 9.0 8.1
13 9.5 6.2 7.7 5.3 7.1 6.8 8.8 7.7 7.3 7.9 7.2 7.1 7.4 8.1 8.3 7.5
14 9.0 5.6 7.0 4.6 6.6 5.7 8.3 7.0 6.8 7.5 6.5 6.5 7.0 7.9 7.5 7.3
15 9.0 4.7 6.9 3.8 6.3 5.1 7.7 6.5 6.4 6.9 6.0 5.9 6.7 7.8 6.9 6.8
16 8.7 3.4 6.5 3.0 6.1 4.8 7.5 6.4 6.0 5.7 5.8 5.5 6.5 7.2
17 8.4 2.0 6.3 1.9 5.9 4.5 7.3 5.8 5.9 5.4 5.6 5.2 6.3 6.3 6.4 5.9
18 8.0 1.0 6.2 1.3 5.8 3.8 7.0 4.4 5.8 5.2 5.5 4.6 6.1 5.7
19 8.0 0.3 6.0 0.6 5.8 3.3 6.9 3.8 5.7 4.1 5.4 3.7 6.1 4.3 6.2 4.5
20 8.0 0.0 6.0 0.0 5.7 2.4 6.8 3.3 5.6 3.5 5.4 2.9 5.9 2.8
21 8.0 0.0 6.0 0.0 6.7 2.6 5.6 2.9 5.9 1.3 6.0 2.3
22 8.0 0.0
23 7.9 0.0 5.9 1.3
24 7.9 0.0

Most recent temperature and dissolved oxygen profile plots

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