Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
EAGLE LAKE TWP PISCATAQUIS 55 1 0.78 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
37 m
(122 ft)
9 m
(30 ft)
3,002 ha
(7,417 ac)
272,431,527 m3
(220,864 ac-ft)
255 km2
(98 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
1978 4.0 4.0 4.0 1
1979 14 3.9 3.9 3.9 1
1982 32 8.0 2 6.0 6.0 6.0 1 2.2 2.3 2.4
1987 4.0 4.6 5.5 3
1988 5.0 5.3 6.0 4
1989 17 42 7.5 3.5 4.5 5.5 2 1.7 2.1 2.5
1990 4.2 4.9 5.5 4
1991 4.6 5.1 5.8 5
1992 4.3 5.3 5.9 5
1993 4.6 5.1 5.6 6
1994 4.5 5.0 5.5 3
1995 4.8 5.5 5.8 4
1996 4.2 5.2 5.6 6
1997 4.5 4.9 5.8 6
1998 4.0 5.0 5.9 6
1999 16 42 6.0 4.0 5.2 6.5 6 2.7 2.7 2.7
2000 4.3 4.8 5.6 5
2001 4.6 6.0 7.4 5
2003 4.3 4.7 5.2 5
2004 36 16 44 7.4 5.0 4.4 5.1 5.9 4 2.7 2.7 2.7
2005 4.2 5.1 5.8 5
2006 4.4 4.6 5.2 6
2007 4.3 5.0 5.8 6
2008 4.0 4.7 5.4 6
2009 4.4 5.0 5.7 6
2010 4.2 4.6 5.1 6
2011 41 15 37 7.4 5 3.8 4.3 4.6 6
2012 4.0 4.9 5.4 5
2013 4.2 4.8 6.0 3
2015 4.4 4.9 5.8 5
2016 3.8 4.7 5.3 6
2017 3.7 4.8 5.4 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
38 16 40 7.4 6.6 5 2 3.5 4.9 7.4 4.6 1.7 2.5 2.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1982-08-16
1989-08-18
1999-08-13
2004-08-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 19.0 9.0 22.8 8.7 20.8 9.0 20.3 7.8
1 22.4 8.7 19.8 8.7 20.3 7.9
2 19.0 9.0 19.5 8.4 20.3 7.8
3 22.0 8.7 19.3 8.4 20.3 7.8
4 18.5 9.0 19.2 8.3 20.3 7.8
5 21.5 8.5 18.9 8.3 20.3 7.8
6 18.2 8.9 18.7 8.3 20.3 7.9
7 20.0 7.3 18.7 8.3 20.2 7.8
8 18.0 8.8 18.5 8.0 18.6 6.8
9 16.0 6.7 18.4 7.9 17.9 6.8
10 16.5 8.0 18.2 7.8 17.3 6.9
11 12.5 7.1 15.7 7.8 16.8 6.9
12 10.0 8.2 12.1 7.3 15.5 7.1
13 11.0 7.6 9.8 7.7 13.5 7.4
14 8.0 8.5 9.4 7.8 12.8 7.8
15 9.0 8.0 11.8 7.9
16 7.0 8.7
17 9.6 8.3
18 6.0 8.9
19
20 5.5 8.8 7.0 8.6 8.3 8.5
21
22 5.5 8.8
23
24 5.3 8.7
25 6.0 8.6 7.5 8.2
26 5.2 8.5
27
28
29
30 6.0 8.0 7.2 7.8
31
32
33
34
35 5.9 7.0

Recent temperature and dissolved oxygen profile plots

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