Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PRESQUE ISLE AROOSTOOK 65 1 NA flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
3 m
(9 ft) 		1 m
(4 ft) 		36 ha
(90 ac) 		NA m3
(NA ac-ft) 		NA km2
(NA 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 (\(\mu\)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 19 1.5 1.7 1.8 4 1 6.0 6.0 6.0
1977 78 94 20 19 1.0 1.5 2.0 4 1 3.9 5.5 7.2
1978 50 109 1.2 1.5 1.8 4 5.6 10.4 13.4
1979 50 117 1.2 1.6 2.0 4 1
1980 52 103 1.5 1.9 2.2 5 2
1981 1.5 1.9 2.4 4 4.0 6.4 13.5
1982 2.5 2.5 2.5 1 1
1983 47 107 1.6 2.2 2.6 6 3 2.9 7.7 34.9
1984 1.2 2.1 2.8 4 4.2 6.0 7.5
1985 40 35 4.1 17.3 42.1
1990 1.9 2.4 2.7 4 4
1998 56 138 17 1.8 2.2 2.6 5 1 4.7 4.7 4.7
1999 1.4 2.3 3.1 6 4
2000 24 1.4 2.2 2.9 6 1 8.4 8.4 8.4
2001 71 158 8.2 16 2.1 2.8 3.0 7 5 3.5 6.8 8.6
2002 2.4 2.8 3.0 5 2
2003 10 74 164 13 12 12 2.4 2.8 3.0 6 7 3.7 4.7 6.0
2004 16 12 2.2 2.4 2.6 3 6.3 6.3 6.3
2005 10 68 162 8.4 16 2.1 2.1 2.1 1 8.8 8.8 8.8
2010 2.2 2.6 2.7 6 15
2011 18 2.1 2.6 2.8 8 18 14.0 14.0 14.0
2012 2.5 2.7 2.9 6 17
2013 2.7 2.9 3.1 5 8
2014 5 68 114 8.2 16 2.3 2.3 2.3 1 7.9 7.9 7.9

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
8.3 62 127 8.2 20 19 12 1 2.3 3.1 4.6 2.9 8.1 42

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2001-08-20
2001-08-23
2001-09-10
2003-08-25
2004-08-04
2005-08-18
2011-08-25
2014-09-08
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.0 23 8.7 22 10 19 8.6 25 9.4 21 8.8 20 9.1 21 9.0
1 22 7.9 22 8.8 22 10 19 8.6 25 9.4 21 8.4 20 9.1 21 9.0
2 22 7.9 22 9.0 22 11 18 9.5 24 10.2 21 8.8 20 9.1 20 9.8
3 22 9.1 20 7.7

Recent temperature and dissolved oxygen profile plots

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