Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
OTISFIELD OXFORD 11 1 0.99 flushes/yr 531 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(25 ft) 		3 m
(10 ft) 		69 ha
(170 ac) 		2,094,336 m3
(1,698 ac-ft) 		3 km2
(1.3 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
1984 3.0 12.8 3.8 4.9 6.0 6 1 1.8 3.6 8.7
1987 5.4 6.4 7.0 6 4
1988 4.0 4.9 5.6 6.5 5
1989 9.4 4.7 5.5 6.8 5 1
1990 9.0 4.0 5.0 6.0 2
1995 9.9 7.5 22.0 4.3 6.1 6.6 5 2
1996 5.5 21 6.8 9.2 9.5 4.1 5.2 6.2 4 1.9 2.8 3.7
2004 6.0
2005 6.2 6.3 6.3 3
2006 5.0 5.6 6.3 7.0 3
2007 15 4.6 36 6.9 7.0 4.2 6.3 8.8 7 1 2.0 2.0 2.0
2008 5.0 6.1 7.1 5 1
2009 7.0 5.2 6.3 7.1 7
2010 5.4 6.5 7.3 5 3
2011 9.0 4.2 6.1 7.1 7 2
2012 11 4.8 38 6.9 6.0 5.2 6.3 7.2 7 1
2013 5.0 5.0 6.4 7.5 8 3
2014 5.3 5.3 6.5 7.2 5 4
2015 6.0 5.0 6.0 7.4 7 1
2016 6.0 4.5 5.5 6.3 3
2017 5.0 4.7 6.1 7.3 5 2
2018 8 7.0 52 6.9 11.0 6.5 5.0 5.7 6.4 4 2.0 2.0 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 5.5 37 6.9 9.4 6.1 16 3.8 5.9 8.8 5.2 1.8 2.6 8.7

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1987-08-24
1989-08-03
1989-09-07
1995-08-18
1995-09-15
1996-08-06
2007-08-22
2018-09-04
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21 8.2 24 8.2 20 9.2 26 8.6 19 9.2 27 7.8 22 8.2 26 8.1
1 21 8.2 24 8.2 19 9.2 26 8.5 19 9.1 25 8.1 22 8.3 25 8.1
2 21 8.2 24 8.1 18 9.3 26 8.5 19 9.1 24 8.1 21 8.3 25 8.0
3 21 8.2 23 7.9 18 9.3 26 8.5 19 9.1 22 8.1 21 8.4 25 7.9
4 21 8.2 23 7.6 18 9.2 25 8.5 19 9.0 22 7.8 21 8.2 25 7.8
5 21 8.2 19 4.0 18 9.1 24 7.7 19 9.0 20 5.2 21 8.3 24 7.6
6 20 8.2 14 0.2 18 8.1 21 2.9 19 9.0 18 2.3 21 8.2 23 5.6
7 16 0.2 20 7.5

Most recent temperature and dissolved oxygen profile plots

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