Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
LEEDS ANDROSCOGGIN 12 1 1.55 flushes/yr 269 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(38 ft) 		4 m
(14 ft) 		1,615 ha
(3,992 ac) 		69,982,395 m3
(56,736 ac-ft) 		47 km2
(18 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
1992 3.3 4.4 5.3 6
1993 3.5 4.4 6.0 7
1994 3.3 4.3 5.1 6
2009 3.9 3.9 4.0 2
2010 4.4 4.6 4.9 3
2011 3.4 4.6 5.4 5
2012 4.6 4.9 5.3 5
2013 12 4.0 4.7 5.1 6
2014 7.6 4.4 4.8 5.3 4
2015 4.4 4.8 5.1 5
2016 2.2 4.5 5.2 5
2017 37 4.6 4.9 5.1 5
2018 4.3 4.9 5.3 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
25 7.6 2.2 4.6 6 4.8 Inf 1

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-04
2015-08-03
2015-08-28
2016-08-03
2016-08-20
2016-09-12
2017-08-09
2018-08-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.5 27 8.4 27 8.5 27 8.0 28 7.8 20 7.9 26 8.1 25 8.2
1 21 8.5 27 8.4 27 8.6 27 7.9 28 7.5 26 7.8 26 8.0 25 8.2
2 21 8.1 27 8.4 27 8.5 27 7.8 28 7.3 26 7.8 26 8.0 25 8.1
3 20 8.1 27 8.3 27 8.4 26 7.1 26 7.3 25 7.6 26 7.7 25 8.0
4 20 8.0 27 8.3 26 8.4 26 6.6 26 6.8 24 7.1 25 7.6 24 7.9
5 18 7.9 27 7.9 26 8.3 22 5.9 19 4.3 24 6.2 21 7.3 24 7.7
6 19 7.7 23 7.3 26 8.1 17 5.1 19 4.2 20 5.1 18 5.1 22 7.1
7 19 7.2 22 4.6 26 7.9 17 0.2 18 0.3 17 0.1 17 1.1 20 1.5
8 19 3.3 21 4.2 26 7.8
9 18 0.9 20 3.9 23 7.1
10 20 3.4 20 0.3
11 19 0.2

Most recent temperature and dissolved oxygen profile plots

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