Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MONTICELLO AROOSTOOK 59 1 2.58 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
33 m
(108 ft) 		13 m
(42 ft) 		8 ha
(20 ac) 		1,022,245 m3
(829 ac-ft) 		4 km2
(1.4 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
1990 142 168 8.2 15 2.5 2.5 2.5 1 5.0 5.0 5.0
1991 2.4 3.9 5.0 4
1999 74 206 8 548 4.9 5.6 6.2 1 4.2 4.2 4.2
2014 9 87 142 8.3 24 1561 1.2 1.2 1.2 1 11.0 11.0 11.0
2017 2.3 4.4 6.5 4

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
9 101 172 8.3 16 1055 1.2 3.5 6.5 2.2 4.2 6.7 11

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1990-08-21
1999-08-24
2014-09-08
2017-08-02
2017-08-16
2017-09-19
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22.2 10.0 23.3 11.4 20.8 10.8 22.4 10.2 22.0 10.0 20.0 10.0
1 22.0 10.1 21.6 11.6 20.2 10.8 22.3 9.9 22.1 10.0 19.9 10.0
2 21.1 11.7 19.7 10.6 22.2 9.8 21.7 10.0 19.6 10.0
3 19.2 12.0 20.7 11.7 14.2 10.6 18.9 16.8 20.2 14.8 18.6 10.4
4 13.5 17.6 19.8 12.8 9.5 2.8 13.1 16.8 14.9 17.1 17.1 11.6
5 9.1 14.8 16.5 18.3 7.2 0.6 9.9 14.7 10.8 15.3 13.7 14.2
6 5.0 9.6 12.4 15.3 6.0 0.6 7.7 10.6 8.5 10.0 10.2 8.7
7 3.8 0.8 10.6 10.6 5.2 0.6 6.2 5.8 7.0 6.7 7.8 3.3
8 8.2 2.8 4.8 0.6 5.4 1.6 6.7 3.2 6.6 0.6
9 2.6 0.6 7.2 1.4 4.6 0.6 5.0 0.6 5.1 0.9 6.0 0.4
10 6.4 0.7 4.6 0.5 4.9 0.3 4.9 0.3 5.4 0.3
11 2.2 0.5 5.9 0.6 4.6 0.5 4.7 0.2 4.8 0.2 5.1 0.2
12 5.4 0.6 4.5 0.5 4.7 0.2 4.7 0.2 4.8 0.2
13 2.1 0.5 5.0 0.3 4.5 0.5 4.7 0.2 4.7 0.1 4.7 0.1
14 4.8 0.3 4.5 0.5 4.7 0.2 4.7 0.1 4.7 0.1
15 2.0 0.5 4.8 0.3 4.5 0.5 4.7 0.2 4.7 0.1 4.7 0.1
16 4.7 0.2 4.7 0.1 4.7 0.1
17 4.5 0.5 4.8 0.1 4.8 0.1 4.7 0.1
18 4.8 0.1 4.8 0.1 4.8 0.1
19 4.6 0.5 4.9 0.1 4.8 0.1 4.8 0.1
20 2.0 0.4 4.6 0.2 4.9 0.1 4.9 0.1 4.8 0.1
21 4.7 0.5 4.9 0.1 4.9 0.1
22 5.0 0.1 4.9 0.1 4.9 0.1
23 4.8 0.5 5.0 0.1 5.0 0.1 5.0 0.1
24 5.0 0.1 5.0 0.1 5.0 0.1
25 2.0 0.4 4.7 0.2 4.9 0.5 5.0 0.1 5.0 0.1 5.0 0.1
26 5.0 0.1
27 5.1 0.1
28
29 4.9 0.1 5.1 0.1
30 2.1 0.4 4.8 0.2 4.9 0.5 5.1 0.1 5.1 0.1

Recent temperature and dissolved oxygen profile plots

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