Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LOBSTER TWP PISCATAQUIS 49 1 0.62 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
32 m
(106 ft) 		8 m
(27 ft) 		1,316 ha
(3,253 ac) 		109,652,000 m3
(88,896 ac-ft) 		103 km2
(40 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
1989 14 37 10 5.2 5.2 5.2 1 3.6 3.6 3.6
1991 3.0 3.6 4.2 4
2001 9 33 7.3 6 5.8 5.8 5.8 1 3.0 3.0 3.0
2010 5 4.2 5.3 5.8 2 2.3 2.3 2.3
2012 5.2 5.2 5.2 1
2016 24 13 33 7.3 8 5.3 5.3 5.3 1 3.0 3.0 3.0

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
24 12 34 7.3 7.2 3 5 5.8 1.7 2.3 3 3.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1989-09-13
2001-08-16
2010-08-30
2016-08-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 19 9.8 23.0 8.6 21.7 8.0 21.5 8.5
1 18 9.6 22.9 8.6 21.6 8.1 21.4 8.5
2 22.8 8.6 21.4 8.1 21.3 8.5
3 19 9.6 22.6 8.6 21.3 8.1 21.3 8.4
4 22.3 8.5 21.1 8.2 21.3 8.3
5 19 9.6 22.1 8.4 20.3 8.5 21.3 8.4
6 21.4 8.1 20.2 8.4 21.2 8.4
7 18 8.6 21.1 8.1 20.2 8.4 21.1 8.1
8 17.9 5.5 20.1 8.3 20.7 8.0
9 17 8.4 16.1 4.9 20.0 8.2 20.7 7.9
10 14.8 4.7 19.9 8.0 20.5 7.8
11 16 7.7 12.5 4.8 18.4 6.8 20.1 7.6
12 10.8 5.3 13.7 4.5 19.3 6.3
13 11 4.8 9.9 5.6 12.2 4.6 13.9 4.6
14 9.0 6.1 11.6 5.1 13.7 4.2
15 10 4.7 8.8 6.1 11.3 5.3 11.4 4.6
16
17 7.9 6.8 10.6 5.6 10.5 4.5
18
19 7.2 6.9 10.0 5.6 10.5 4.4
20 8 5.3
21 7.0 6.8 9.7 5.4 8.7 5.9
22
23 7.0 6.9 9.5 5.1 8.5 5.8
24
25 7 5.1 6.8 6.6 9.4 4.8 8.4 4.5
26
27 6.8 6.3 9.1 3.6
28
29 6.8 6.0
30 7 3.4 6.4 5.6 8.3 4.0

Recent temperature and dissolved oxygen profile plots

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