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
5 m
(15 ft) 		2 m
(7 ft) 		160 ha
(395 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
1979 65 205 0.30 0.35 0.40 2
1981 50 1.10 1.26 1.50 4 13 20 26
1983 51 1.30 1.30 1.30 1 16 22 34
1998 75 182 30 1.20 1.33 1.50 1 24 24 24
1999 1.25 1.70 2.10 5
2000 25 0.70 1.65 2.35 6 11 11 11
2001 86 209 8.1 42 0.85 1.15 1.42 4 12 19 31
2003 14 105 237 56 0.95 0.95 0.95 1 39 39 39
2005 13 100 240 8.2 42 1.25 1.30 1.35 1 29 29 29
2009 31 70 1.32 1.32 1.33 1 27 27 27

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
14 86 215 8.2 37 54 70 0.3 1.2 2.4 2.6 11 24 39

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2000-08-29
2000-09-27
2001-08-20
2001-08-23
2001-09-10
2003-08-25
2005-08-18
2009-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21 10.1 14 9.8 22 8.0 23 9.6 24 9.5 19 8.1 22 8.2 25 8.3
1 20 9.8 14 10.2 22 8.1 22 9.2 23 9.6 19 8.2 22 8.2 25 8.4
2 20 6.8 14 9.4 22 8.1 22 8.8 23 9.6 19 8.2 22 8.2 24 7.5
3 20 4.9 22 8.0 19 8.1 22 8.2 22 0.2
4 20 4.4 22 7.7 22 7.3 21 0.1

Recent temperature and dissolved oxygen profile plots

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