Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
NORWAY OXFORD 10 1 1.38 flushes/yr 397 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
15 m
(48 ft) 		6 m
(19 ft) 		384 ha
(948 ac) 		21,974,187 m3
(17,815 ac-ft) 		46 km2
(18 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 23.2 42 10.0 9.8 4.5 5.0 5.8 4 5.7 5.7 5.7
1977 8.0 3.8 5.2 6.0 4
1978 4.0 5.0 6.5 3
1979 9.0 4.3 5.5 6.7 5 3.7 3.7 3.7
1980 14.0 65 19.0 24.0 3.1 5.0 6.8 7 8.2 8.2 8.2
1981 4.0 5.4 7.5 6
1982 4.6 5.5 6.7 6
1983 13.5 8.0 28.0 4.0 5.3 7.0 6 2.7 2.7 2.7
1984 44 4.2 4.2 4.2 1
1985 4.8 6.3 8.1 7
1986 11.0 46 11.0 13.0 4.9 5.6 7.5 5
1987 6.0 4.3 5.3 6.8 7
1988 9.0 5.2 6.7 9.0 6
1989 15.7 14.0 4.0 5.1 6.8 5
1990 9.0 4.7 6.1 6.9 5
1991 12.0 7.2 8.0 4.5 5.7 7.1 5
1992 13.9 7.1 8.5 3.9 4.8 5.4 5
1993 13.6 7.5 8.2 23.5 4.6 5.9 7.4 5
1994 14.0 6.8 8.3 15.0 4.9 6.6 7.7 5
1995 13.0 6.0 12.0 5.6 6.8 8.2 6
1996 8.6 7.4 8.2 16.0 4.9 5.8 6.8 5
1997 12.3 7.1 7.2 8.5 5.1 6.0 7.5 5 3.2 5.4 7.8
1998 13.0 7.1 7.6 10.0 5.3 6.3 7.6 5 3.2 4.7 6.5
1999 14.0 7.1 8.2 10.5 9.1 3.9 5.7 7.2 7 2.4 3.9 5.5
2000 14.0 7.1 11.0 10.0 4.2 5.4 7.4 5 5.0 5.8 6.6
2001 12.2 73 7.2 8.0 17.5 5.2 6.6 7.8 6 2.7 3.0 3.7
2002 19.0 6.9 10.0 10.0 5.0 6.1 7.2 7 2.7 3.8 5.5
2003 13.2 99 7.0 8.8 8.0 5.3 6.7 7.5 5 2.2 2.9 3.7
2004 14.0 6.9 7.0 13.0 5.2 6.5 7.8 5 2.5 4.0 6.8
2005 12.5 72 6.7 8.2 8.0 4.8 5.9 7.6 5 2.7 4.1 5.3
2006 13.8 7.5 7.4 14.5 5.0 6.0 7.0 5 3.1 4.4 7.2
2007 13.0 6.8 8.8 9.0 4.6 5.6 6.4 7 2.7 4.3 6.2
2008 6.8 8.0 4.2 5.4 6.0 5 3.3 4.6 5.4
2009 15.0 6.8 11.0 13.0 4.3 5.7 7.8 5 2.2 5.5 9.7
2010 9.5 13.5 4.6 5.7 6.6 9 2.5 4.3 5.3
2011 15.0 9.1 11.0 4.6 5.7 6.8 7 3.5 4.6 5.7
2012 14.0 8.2 16.0 3.9 5.4 7.4 5 2.5 3.8 4.7
2013 15.5 9.6 11.0 3.8 5.3 7.8 6 2.0 4.2 6.8
2014 15.0 68 8.0 8.5 4.7 5.3 6.2 7 4.3 5.2 7.9
2015 20.8 74 7.1 8.5 8.0 8.5 3.0 5.0 6.1 6 5.4 7.5 9.3
2016 13 14.1 87 6.9 9.5 12.6 5.0 5.7 6.3 5 3.2 4.0 5.0
2017 14.0 83 7.5 8.3 13.5 5.3 5.9 7.0 3 3.8 5.2 7.0
2018 30.2 69 7.2 5.5 15.0 4.0 5.0 6.2 4 3.0 3.0 3.0

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
13 15 68 7 9 7.5 13 9.4 3 5.7 9 5.4 2 4.6 9.7

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
2013-08-27
2014-08-15
2015-08-16
2016-08-21
2017-08-15
2017-09-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.5 8.0 27 8.3 25.0 8.5 23.3 8.1 26.2 8.3 25 8.2 24 8.3 21 9.2
1 23.5 8.0 26 8.5 24.0 8.6 23.2 8.1 25.5 8.4 25 8.1 24 8.4 21 9.2
2 23.5 8.1 25 8.6 23.9 8.6 23.1 8.1 25.1 8.4 25 8.1 24 8.3 21 9.3
3 23.5 8.1 25 8.6 23.8 8.6 23.0 8.1 24.5 8.3 25 8.0 24 8.3 21 9.2
4 23.4 8.1 25 8.5 23.5 8.2 23.0 7.9 24.1 8.1 24 7.9 24 8.3 20 8.9
5 23.4 8.0 25 8.3 22.8 6.9 22.9 7.9 23.7 7.6 24 7.8 24 8.3 20 8.3
6 23.4 8.1 22 2.8 21.4 3.3 22.9 7.8 23.2 6.7 24 7.4 21 4.3 20 8.1
7 20.3 2.4 19 0.6 20.1 1.4 21.1 3.5 21.0 2.1 23 3.7 18 1.4 19 7.6
8 16.6 0.3 17 0.2 17.8 0.1 18.6 1.3 18.2 1.2 21 1.4 15 2.8 19 6.9
9 13.9 0.1 15 0.1 15.1 0.0 15.7 0.9 16.0 0.8 18 0.3 14 1.5 18 1.9
10 12.0 0.3 14 0.1 13.1 0.0 13.2 0.5 14.3 0.1 17 0.2 13 0.7 15 0.2
11 11.0 0.0 13 0.1 11.9 0.0 11.3 0.5 12.1 0.1 15 0.2 12 0.8 12 0.2
12 9.9 0.0 12 0.1 10.9 0.0 9.9 0.2 10.5 0.0 14 0.2 11 0.2 11 0.2
13 9.0 0.0 11 0.1 9.9 0.0 9.4 0.2 9.8 0.0 14 0.1 11 0.2 11 0.2
14 8.8 0.0 11 0.1 9.4 0.0 13 0.1 11 0.2

Most recent temperature and dissolved oxygen profile plots

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