Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
OTISFIELD OXFORD 5 1 0.24 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
19 m
(62 ft) 		9 m
(30 ft) 		531 ha
(1,312 ac) 		49,492,880 m3
(40,125 ac-ft) 		15 km2
(5.6 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
1977 6.0 7.8 9.0 4
1978 8.5 35 4.0 8.0 10.5 7 2.7 2.7 2.7
1979 7.3 8.1 10.0 8
1980 6.0 8.8 10.0 8
1981 8.0 31 6.0 16 7.5 8.6 10.0 8 1.8 1.8 1.8
1982 7.5 8.2 10.0 7
1983 5.5 7.7 9.1 8
1984 5.0 7.5 10.3 7
1985 6.0 29 4.0 8 5.0 8.0 9.5 6
1986 7.0 7.9 8.5 6
1987 7.0 8.3 9.5 8
1988 10.0 7.0 19 7.0 8.0 9.1 7
1989 7.3 8.1 9.7 6
1990 7.6 8.5 10.5 8
1991 13.5 36 7.4 4.0 8.1 9.2 10.8 7
1992 8.6 6.4 6.0 8.0 9.5 10.5 6 0.7 1.5 2.7
1993 6.6 3.0 8 7.3 9.5 11.1 6 1.5 1.5 1.5
1994 6.0 6.5 4.3 11 7.6 9.7 10.9 8
1995 8.5 3.5 12 8.0 10.3 11.8 6
1996 8.6 9.3 10.2 6
1997 6.4 8.3 9.3 6
1998 9.0 6.0 7 7.0 8.9 10.4 4 3.9 3.9 3.9
2001 9.7 10.1 10.6 2
2002 8.0 8.8 9.6 4
2003 3.5 11.0 55 4.0 7.7 8.8 9.6 3 2.3 2.3 2.3
2004 5.5 6.7 7.2 7.8 5
2005 4.0 7.0 8.1 9.4 6
2006 5.0 7.0 56 7.0 5.0 5.0 10 7.5 8.2 8.9 4 3.8 3.8 3.8
2007 7.0 6.9 8.1 9.1 6
2008 7.8 9.1 10.3 4
2009 5.0 6.8 7.4 7.9 5
2010 4.0 7.0 7.7 8.2 5
2011 5.0 5.0 7.5 8.1 8.5 4 2.2 2.2 2.2
2012 48 6.4 4.0 6.5 7.5 8.6 5
2013 6.0 6.1 7.2 7.8 6
2014 3.0 7.5 8.4 9.3 4
2015 3.0 8.0 49 7.2 5.0 3.0 9 5.1 8.5 9.8 4 2.0 2.0 2.0
2016 5.0 7.8 8.8 9.9 5
2017 5.0 7.4 8.2 9.1 6

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
3.8 8.7 42 6.7 4.8 4.7 11 4 8.4 12 5.8 0.7 2.4 3.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-31
2016-08-11
2016-08-22
2016-09-09
2016-09-16
2017-08-19
2017-09-12
2017-09-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.6 25 8.8 24 8.8 24 8.6 22 8.8 23 8.5 21 8.9 23 8.7
1 25 8.6 24 9.0 24 8.8 24 8.6 22 8.8 23 8.6 20 9.0 22 8.9
2 25 8.6 24 9.1 24 8.7 23 8.7 22 8.8 23 8.6 20 9.0 21 9.0
3 25 8.6 24 9.0 24 9.0 23 8.6 22 8.8 23 8.6 20 9.1 21 9.1
4 25 8.6 24 9.0 24 8.8 23 8.6 22 8.9 23 8.6 20 8.7 21 9.1
5 24 8.6 24 8.9 24 8.8 23 8.5 22 8.7 23 8.5 20 9.1 20 9.1
6 24 8.6 24 8.9 24 8.9 23 8.5 22 8.8 23 8.3 20 9.1 20 9.1
7 24 8.4 24 8.9 24 9.0 23 8.4 22 8.7 22 8.5 20 9.1 20 9.0
8 24 8.4 24 8.8 24 8.8 23 8.4 22 8.7 20 9.5 20 9.0 20 8.7
9 21 8.4 24 9.9 24 9.0 23 8.3 22 8.7 16 10.3 19 9.0 20 8.4
10 19 8.4 19 10.2 20 9.1 19 7.5 16 7.4 13 9.1 17 7.2 18 7.2
11 17 8.1 17 9.8 17 9.2 15 6.9 15 6.3 12 7.0 14 6.6 16 5.9
12 14 7.2 15 8.8 15 8.3 14 4.5 14 5.0 12 6.0 12 4.4 13 4.1
13 13 6.1 14 7.8 14 6.9 13 3.6 13 3.0 12 5.0 11 2.3 12 2.6
14 12 4.5 14 6.9 14 6.1 13 2.8 13 2.6 11 4.1 11 1.6 12 1.4
15 12 2.9 14 6.4 14 5.4 13 2.5 13 2.5 11 3.4 11 0.8 11 0.4
16 12 0.4 13 6.0 13 4.5 13 2.3 11 2.9 11 0.6 11 0.1
17 12 0.3 13 5.2 13 3.9 11 2.6 11 0.4 11 0.1
18 12 0.2 13 4.4 13 3.3

Recent temperature and dissolved oxygen profile plots

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