Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
NORWAY OXFORD 10 1 0.54 flushes/yr 507 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(56 ft) 		8 m
(27 ft) 		55 ha
(136 ac) 		4,486,555 m3
(3,637 ac-ft) 		2 km2
(0.8 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
1976 11.7 24 5.0 7.5 5.2 5.9 7.0 4 4.1 4.1 4.1
1977 8.0 4.0 5.9 7.5 4
1978 4.5 6.0 7.0 3
1979 5.5 6.9 8.8 5
1980 10.0 22 24.0 19.0 3.3 6.6 8.5 8 3.2 3.2 3.2
1981 4.3 6.3 8.0 5
1982 5.5 7.0 7.9 5
1983 9.0 8.0 5.0 6.8 8.3 6 1.1 1.1 1.1
1985 4.5 8.2 9.5 5
1986 6.0 20 4.0 12.0 6.5 7.9 8.8 5
1987 5.5 5.3 7.4 8.9 5
1988 5.0 5.8 6.9 8.3 5
1989 9.0 4.2 7.2 8.9 5
1990 8.0 3.7 6.4 7.9 6
1991 7.0 7.0 4.3 7.1 8.9 5
1992 5.8 7.0 5.3 5.5 7.3 8.8 5
1993 9.7 7.1 5.7 5.6 7.5 8.9 4
1994 7.0 6.4 6.0 15.0 4.6 7.8 9.2 5
1995 7.0 3.3 16.0 7.0 7.8 9.1 3
1996 5.0 7.1 4.6 14.0 6.4 7.9 9.2 6
1997 7.5 7.1 5.2 10.0 5.1 6.6 7.9 5 2.5 3.0 3.5
1998 6.8 7.0 6.2 9.5 6.1 7.1 7.6 5 5.0 5.0 5.0
1999 7.1 7.0 5.8 8.5 7.8 8.4 9.4 5 1.1 2.1 3.2
2000 6.5 6.9 5.0 8.0 6.0 7.3 8.6 5 2.2 3.0 3.7
2001 7.0 6.9 4.6 16.0 6.8 8.1 8.9 5 1.3 2.4 3.6
2002 6.5 7.1 16.0 17.0 6.8 7.9 10.0 5 1.5 2.3 3.9
2003 9.0 42 6.9 4.0 17.0 8.4 9.0 9.8 5 1.2 1.5 2.1
2004 6.5 6.8 4.2 18.0 7.9 8.6 9.4 5 1.3 1.7 2.0
2005 6.0 36 6.8 6.0 18.5 5.9 8.5 10.3 5 1.3 2.5 4.0
2006 6.5 7.3 6.4 24.5 6.5 7.7 8.6 5 2.0 2.7 3.8
2007 6.3 6.6 6.0 16.0 5.8 7.0 8.2 5 2.2 3.0 3.6
2008 5.5 6.7 4.4 20.0 6.0 7.7 8.8 5 2.0 2.5 3.1
2009 6.5 6.6 6.1 6.2 7.2 8.4 5 1.6 3.0 4.4
2010 3.8 16.0 5.0 7.2 8.9 5 2.0 2.5 3.7
2011 6.0 5.0 22.0 5.8 7.8 8.9 5 1.4 2.4 2.9
2012 12.0 5.9 33 7.2 4.7 14.0 6.2 7.1 8.0 6 2.5 3.4 4.4
2013 7.0 5.4 20.0 6.4 7.7 8.5 5 1.6 2.8 3.7
2014 7.0 34 5.2 16.5 6.9 8.1 9.2 4 1.8 2.9 7.2
2015 7.8 42 6.9 2.5 3.7 9.0 6.1 8.0 9.2 6 1.0 1.7 2.7
2016 9.5 11.0 43 6.6 5.2 11.8 6.9 7.1 7.4 5 1.2 3.0 7.6
2017 44 7.2 4.0 16.0 6.2 7.2 7.8 4 1.4 2.1 2.9
2018 16.2 53 7.3 2.9 11.8 5.3 7.3 8.5 4 1.0 1.2 2.0

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
11 7.4 36 6.9 6.2 3.3 15 7.5 3.3 7.4 10 5 1 2.6 7.6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-08-23
2012-08-20
2013-08-30
2014-08-15
2015-08-23
2015-09-15
2016-08-19
2017-08-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.5 8.3 25.4 8.5 24.2 8.5 23.1 8.4 25.4 8.3 23.8 8.5 24.7 8.5 24.5 8.5
1 23.5 8.4 25.0 8.5 23.8 8.5 23.0 8.4 25.5 8.2 23.5 8.5 24.7 8.5 24.3 8.5
2 23.5 8.4 24.8 8.6 23.5 8.6 22.8 8.5 25.4 8.2 23.3 8.6 24.7 8.5 24.1 8.5
3 23.3 8.5 24.7 8.6 23.4 8.6 22.7 8.5 25.3 8.2 23.2 8.6 24.5 8.5 24.0 8.5
4 23.1 8.4 24.4 8.6 23.4 8.5 22.7 8.4 25.3 8.1 23.1 8.6 24.4 8.4 24.0 8.5
5 20.7 11.2 21.4 11.8 21.3 9.5 22.5 8.4 22.6 10.1 23.0 8.5 24.4 8.4 20.4 12.4
6 14.0 14.1 15.9 13.5 16.2 12.7 16.4 13.6 17.5 13.2 19.4 12.8 20.6 11.0 15.1 13.4
7 10.7 14.3 13.0 13.4 12.8 13.5 12.1 14.0 13.4 13.4 15.2 13.2 16.5 11.5 11.2 12.0
8 9.1 11.9 10.6 9.5 10.4 8.9 10.0 13.1 10.6 11.9 11.7 12.1 13.0 10.4 9.3 9.9
9 7.6 10.9 9.3 6.0 9.1 8.4 8.5 12.9 8.7 11.7 9.7 11.4 10.6 8.6 8.2 8.3
10 6.6 9.1 8.7 5.1 8.1 5.1 7.3 8.0 7.5 9.3 8.2 9.1 9.2 6.9 7.4 7.4
11 6.0 6.2 7.7 1.8 7.6 2.2 6.7 6.1 6.9 5.3 7.4 3.9 8.2 3.2 6.7 5.6
12 5.7 2.6 7.4 1.1 7.2 0.2 6.3 3.0 6.5 3.0 7.0 2.1 7.5 1.5 6.2 3.2
13 5.5 1.4 7.2 0.3 7.0 0.0 6.1 0.3 6.3 1.6 6.7 0.4 7.2 0.5 5.9 1.3
14 5.4 0.0 7.1 0.2 6.9 0.0 6.1 0.1 6.1 0.1 7.0 0.2 5.8 0.2
15 5.4 0.0 7.0 0.2 6.8 0.0 6.0 0.1 5.7 0.1
16 5.4 0.0 7.0 0.1 6.8 0.0 6.0 0.1 5.7 0.1
17 5.4 0.0

Most recent temperature and dissolved oxygen profile plots

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