Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ABBOT PISCATAQUIS 31 1 0.62 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(56 ft) 		6 m
(21 ft) 		164 ha
(405 ac) 		10,584,410 m3
(8,581 ac-ft) 		10 km2
(3.7 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

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
1981 4.5 5.8 6.5 6
1982 7.0 25 11.0 8.0 5.4 5.8 6.5 6 2.5 2.5 2.5
1993 7.5 5.0 8.1 8.1 8.1 1
1996 33.2 12 6.0 7.5 6.1 6.2 6.3 1 3.7 3.7 3.7
1998 5.7 5.9 6.2 4
2001 4.3 23 7.0 5.0 9.5 6.3 6.3 6.3 1 1.8 1.8 1.8
2009 6 4.8 5.3 5.7 4
2010 7.5 5.2 5.9 6.8 6 2.9 2.9 2.9
2012 4.9 5.3 6.2 5
2013 4 5.4 6.6 7.4 4
2014 6 6.2 6.7 7.5 4
2015 11 7.0 20 6.9 5.0 5 6.0 7.0 8.1 6 2.8 2.8 2.8
2016 6 4.8 5.5 6.2 5
2017 4 5.5 6.4 8.0 6

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
11 12 20 7 6.6 5.2 8.3 4.5 6.2 8.1 4.2 1.8 2.7 3.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1982-08-26
1993-08-27
1996-08-21
1996-08-28
2001-08-17
2010-08-11
2015-08-13
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18.5 8.7 24 8.5 22 8.9 24 8.7 25 8.1 23 8.6 23 8.6
1 18.8 8.6 23 8.5 22 8.9 22 8.9 24 8.1 23 8.6 23 8.6
2 18.8 8.7 23 8.5 22 8.9 22 8.9 24 8.1 23 8.6 23 8.6
3 18.6 8.7 23 8.5 22 8.8 22 8.8 23 8.1 22 8.6 23 8.5
4 18.6 8.6 22 8.3 22 8.7 22 8.8 23 8.1 22 8.6 23 8.5
5 18.3 8.6 22 8.3 21 8.2 21 8.2 23 8.0 22 8.4 22 8.5
6 18.2 8.6 22 8.1 19 5.8 20 6.6 22 7.8 21 7.8 22 7.9
7 18.0 8.5 21 7.0 16 4.0 13 4.0 17 6.9 19 5.3 19 6.2
8 14.5 5.1 18 3.2 14 2.5 14 1.8 14 5.2 15 2.5 16 4.0
9 12.0 3.6 15 0.3 13 2.1 13 1.4 12 3.6 14 1.7 13 3.0
10 10.8 2.8 15 0.1 12 2.0 12 1.2 11 3.1 13 1.4 12 2.6
11 10.2 2.6 14 0.1 12 1.9 12 1.2 11 2.8 13 1.4 12 2.5
12 10.0 2.6 14 0.1 12 1.9 12 1.2 11 2.7 13 1.4 12 2.5
13 9.8 2.3 14 0.1 12 1.8 12 1.2 10 2.5 13 1.3 11 2.4
14 9.8 2.2 13 0.1 12 1.8 12 1.1 10 2.3 13 1.3 11 2.3
15 9.8 1.9 13 0.1 12 1.7 12 1.0 10 2.3 12 1.3 11 2.1
16 12 1.6 12 0.9
17 12 1.5

Recent temperature and dissolved oxygen profile plots

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