Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PENOBSCOT HANCOCK 15 1 5.44 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(21 ft) 		3 m
(11 ft) 		81 ha
(200 ac) 		2,721,329 m3
(2,206 ac-ft) 		24 km2
(9.1 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
1980 5 45 13 5.2 5.2 5.2 1 3.7 3.7 3.7
1992 3.7 3.9 4.0 4
2008 4.0 4.0 4.0 1
2009 18 23 2.9 2.9 3.0 1 8.7 8.7 8.7

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
5 45 16 23 2.9 4 5.2 1.8 3.7 6.2 8.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1980-09-04
2009-08-26
Depth (m) TEMP DO TEMP DO
0 24 8.2 26 7.1
1 23 7.8 25 7.5
2 23 8.0 24 7.0
3 23 8.0 24 5.5
4 23 7.9 20 0.5
5 22 5.6 16 0.4
6 21 2.8 15 0.3

Recent temperature and dissolved oxygen profile plots

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