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Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ORIENT AROOSTOOK 53 1 7.31 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(45 ft) 		5 m
(16 ft) 		393 ha
(970 ac) 		11,785,500 m3
(9,555 ac-ft) 		150 km2
(58 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2017 Secchi Disk Transparency Data"

Water Chemistry and Trophic State Parameters

Table Legend:

Color: Color (SPU), Alk: Alkalinity (mg/l CaCO3), SpCon: Specific Conductivity (μS/cm), pH: pH (standard units)

TP = Total Phosphorus (μg/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 (μg/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 3.5 3.7 4.5 6
1993 3.2 3.6 4.2 4
1994 3.2 3.7 4.2 5
1995 3.6 4.5 5.0 4
1996 2.9 3.5 4.2 5
1997 3.7 4.1 4.3 5
1999 3.3 4.2 5.1 5
2000 3.8 4.2 4.9 4
2001 3.6 4.5 5.3 4
2002 3.8 4.2 4.7 4
2003 3.1 4.2 4.8 4
2004 3.8 4.2 5.0 4
2005 3.4 3.8 4.2 4
2006 3.1 3.7 4.4 5 2
2007 2.9 3.8 4.2 5 5
2008 2.9 3.5 4.0 5 1
2009 3.3 3.7 4.3 5 2
2010 3.2 3.8 4.1 5 2
2011 3.0 3.8 4.2 4
2012 2.9 3.4 3.8 4
2013 3.2 3.7 4.0 4
2014 2.9 3.7 4.1 5 1

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
2.9 3.9 5.3 4.5 Inf 1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2006-08-24
Depth (m) TEMP DO
0 20 8.6
1 20 8.6
2 20 8.5
3 20 8.3
4 20 8.1
5 20 7.9
6 20 7.9
7 19 7.8

Recent temperature and dissolved oxygen profile plots

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