Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
EAGLE LAKE AROOSTOOK 67 1 3.2 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
43 m
(140 ft) 		14 m
(45 ft) 		2,258 ha
(5,580 ac) 		308,000,000 m3
(249,700 ac-ft) 		233 km2
(90 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
1974 9.3 2.8 4.3 5.6 6 1.4 2.9 4.6
1975 19 38 7.9 3.7 4.5 5.5 6 1.5 2.8 4.1
1976 9.8 7.2 3.5 4.1 4.9 6 1.3 2.5 3.8
1977 20 68 3.5 3.5 3.6 2
1989 5.0 9.2 4.6 4.6 4.6 1 1.0 1.0 1.0
1995 4.2 5.1 6.3 4
1996 20 59 13.0 8.0 4.2 4.2 4.2 1 3.2 3.2 3.2
1998 4.6 5.0 5.6 4
1999 3.8 4.6 6.0 6
2000 3.6 4.2 4.8 5
2001 24 62 7.6 6.0 3.8 4.9 6.4 3 2.3 2.3 2.3

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
21 57 7.6 8.4 8.6 7.6 9.2 2.8 4.5 6.4 4 1 2.4 4.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1975-09-09
1996-08-12
2001-08-29
Depth (m) TEMP DO TEMP DO TEMP DO
0 16.4 10.0 20.8 7.9 20.0 8.3
1 21.8 7.9 20.0 8.3
2 16.4 9.8 21.6 7.9 20.0 8.4
3 21.0 7.8 20.0 8.4
4 16.4 9.6 20.8 7.8 20.0 8.4
5 19.0 7.0 20.0 8.4
6 16.4 9.6 19.0 6.6 19.9 8.3
7 18.1 6.5 19.9 8.3
8 18.0 6.5 17.8 6.5
9 16.4 9.6 18.0 6.4 14.9 6.3
10 14.0 8.7 17.0 6.4 14.0 6.2
11 16.6 6.4 12.3 6.5
12 14.0 8.0 14.9 6.4 11.1 6.7
13 12.2 6.8 9.6 7.2
14 7.5 7.8 11.0 6.9 8.6 7.3
15 9.9 7.1 8.2 7.6
16 7.5 7.5 8.8 7.6 7.9 7.6
17 8.1 7.7
18 7.2 7.0 8.0 7.7 6.9 7.8
19 8.0 7.8
20 7.0 7.0 7.4 7.8 6.3 7.6
21 7.3 7.8
22 6.8 7.2 7.1 7.7
23 7.0 7.7
24 6.4 7.2 7.0 7.6
25 7.0 7.6 5.9 7.6
26 6.4 7.0 7.0 7.5
27 7.0 7.5
28 6.2 7.0 7.0 7.5
29 7.0 7.7
30 5.9 6.8 6.9 7.5 5.3 7.1
31
32
33
34
35 5.8 6.5 6.5 7.1
36
37
38
39
40 6.5 6.8

Recent temperature and dissolved oxygen profile plots

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