Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
SQUAPAN TWP AROOSTOOK 64 1 0.6 flushes/yr 602 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
18 m
(58 ft) 		6 m
(20 ft) 		2,227 ha
(5,503 ac) 		136,035,045 m3
(110,285 ac-ft) 		143 km2
(55 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 2018 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
1987 18 2.7 3.3 4.1 5
2001 14 38 7.0 2 4 6.1 6.1 6.1 1 2.8 2.8 2.8
2016 24 15 39 7.3 8 6.1 6.1 6.1 1 2.8 2.8 2.8

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 14 38 7.1 9.3 4 2.7 5.2 6.1 2.3 2.8 2.8 2.8

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1987-08-17
1987-08-24
2001-08-27
2016-08-23
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.3 19 7.8 20 8.0 22 8.4
1 20 8.0 22 8.3
2 21 8.4 20 7.9 20 8.0 21 8.3
3 20 8.0 21 8.2
4 20 8.4 20 7.8 20 7.9 21 8.1
5 20 7.9 21 8.1
6 20 8.3 20 7.9 20 7.9 21 8.1
7 20 7.6 21 8.1
8 19 8.0 20 8.0 20 6.7 21 8.1
9 20 3.6 21 7.5
10 19 8.5 20 7.9 18 3.8 20 5.1
11 18 3.0 19 3.6
12 19 7.5 20 7.9 17 2.6 18 3.2
13 17 2.4 18 2.9
14 18 7.7 20 8.0 18 2.6
15 0 7.8 18 2.4
16
17 17 2.0

Most recent temperature and dissolved oxygen profile plots

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