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
1992 4.2 6.7 6.6 6.6 6.6 1
1995 7 5.5 5.5 5.5 1
1998 5.5 6 9 6.5 6.5 6.5 1 2.6 2.6 2.6
2001 4.0 6.8 7 12 6.0 6.0 6.0 1 4.0 4.0 4.0
2005 5.0 25 7 6 6.4 6.4 6.4 1 2.0 2.0 2.0
2008 7.0 7.0 17 9 4.8 5.7 6.3 7 2 3.9 3.9 3.9
2009 5.2 6.0 7.0 7 3
2010 5.2 5.8 6.4 7 2
2011 5.0 13 5.4 5.9 6.4 6 2 3.2 3.2 3.2
2012 5.2 5.7 6.1 7 1
2013 5.5 6.0 6.8 6 4
2014 5.0 30 5 15 5.4 5.9 6.6 6 5 2.4 2.4 2.4
2015 5.5 5.8 6.4 7 5
2016 4.5 5.2 6.2 8
2017 40 7.0 7 4.9 5.4 6.2 6 5 2.4 2.4 2.4
2018 5.2 5.5 5.9 4 3

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
5.1 32 6.8 8.6 10 4.5 5.9 7 4.8 2 2.9 4

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 8.1 22 8.8 22 8.3 22 8.9 22 8.2 24 7.8 23 8.3 24 8.1
1 20 8.1 22 8.2 22 8.3 22 8.9 22 8.2 23 7.9 23 8.3 24 8.1
2 20 8.1 22 8.1 21 8.3 22 8.9 22 8.2 23 7.9 23 8.3 24 8.2
3 20 8.1 22 8.1 21 8.3 22 8.8 21 8.3 23 7.9 23 8.3 24 8.0
4 20 8.0 22 8.1 21 8.2 22 9.1 21 7.7 22 7.6 22 7.9 23 7.9
5 19 7.8 20 4.3 21 8.2 21 7.1 19 1.3 21 6.7 22 7.2 21 5.5
6 19 7.4 17 0.0 19 1.5 16 0.8 15 0.0 16 2.4 18 2.0 17 2.5
7 19 2.0 15 0.0 14 0.9 13 0.8 13 0.0 13 0.0

Most recent temperature and dissolved oxygen profile plots

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