Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEER ISLE HANCOCK 15 1 1.65 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(20 ft) 		4 m
(13 ft) 		10 ha
(25 ac) 		402,235 m3
(326 ac-ft) 		1 km2
(0.4 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 30 5.4 5.4 5.4 1 6.8 6.8 6.8
1984
1991 16.0 52 6.7 15 2.2 2.9 4.4 7 15.0 15.0 15.0
1992 2.8 4.0 6.9 6
1993 3.3 3.8 4.5 5
1994 3.1 3.8 4.5 5
1995 2.6 3.5 4.7 6
1997 3.4 3.9 5.3 4
1998 4.0 4.8 5.8 7
1999 8.0 64 10 4.3 5.4 6.2 2 4.6 4.6 4.6
2012 3.8 3.8 3.8 1
2013 7 8.5 80 7.1 7 19 4.5 4.8 5.1 5 3.4 3.4 3.4
2015 3.5 3.5 3.5 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
7 11 65 6.9 16 19 2.2 4.1 6.9 4.2 3.4 7.5 15

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1997-08-20
1997-09-02
1997-09-21
1998-08-16
1998-09-03
1998-09-28
1999-08-25
2013-08-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 8.5 23 7.0
1 24 8.2 24 7.8 19 8.1 24 8.4 23 7.2
2 22 7.8 20 7.9 19 7.8 24 8.0 24 8.2 18 8.2 23 8.4 23 7.3
3 22 7.8 20 7.9 19 7.4 24 8.0 23 8.0 18 8.4 23 8.2 23 6.8
4 22 7.6 20 8.4 18 7.2 24 8.0 23 8.0 18 8.0 22 7.8 23 7.2
5 20 1.4 21 9.5 18 7.6 23 7.2 23 7.6 18 7.6 22 7.1 22 1.5
6 16 0.0 18 6.2 18 1.0 20 0.8 18 7.6 18 0.1

Recent temperature and dissolved oxygen profile plots

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