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
1978 3.8 4.1 4.3 2
1979 3.0 3.9 5.2 3
1980 3.9 4.4 5.7 3
1981 4.0 4.6 5.1 2
1982 3.0 4.1 5.0 3
1983 3.8 4.6 5.3 3
1984 3.4 3.8 4.6 2
2009 3.9 4.0 4.2 3
2010 4.2 4.5 4.9 5
2011 3.2 4.2 4.8 5
2012 4.5 4.8 5.3 6
2013 12.1 4.0 4.8 5.5 6
2014 7.2 4.6 4.9 5.4 4
2015 4.4 4.7 4.9 5
2016 2.3 4.4 5.4 6
2017 21.0 3.8 4.9 5.3 5
2018 8.5 4.3 5.0 5.5 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
14 7.2 2.3 4.5 5.7 4.1 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
2016-08-03
2016-08-20
2016-09-12
2017-08-27
2017-09-11
2018-08-11
2018-08-27
2018-09-10
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 28 7.9 28 7.9 27 8.0 26 8.1 26.3 8.0 25 8.2 26 8.2 26 8.2
1 28 7.8 28 7.8 26 7.8 26 8.0 26.2 7.9 25 8.2 26 8.2 26 8.3
2 27 7.4 27 7.4 25 7.3 26 8.0 26.2 7.9 25 8.1 25 8.0 26 8.2
3 27 7.3 27 7.1 24 7.0 26 7.9 25.9 7.7 23 7.9 25 7.8 25 8.0
4 26 7.0 26 6.7 24 6.6 26 7.7 24.4 7.1 23 7.8 25 7.8 25 7.9
5 22 6.4 19 4.1 20 6.2 25 7.2 13.1 4.7 16 4.1 24 7.7 16 3.7
6 17 6.0 18 4.0 17 0.2 24 7.1 10.0 4.3 16 4.0 23 7.5 16 3.6
7 17 0.8 17 0.6 20 1.3 1.4 1.5 15 0.7 22 1.2 15 0.8

Most recent temperature and dissolved oxygen profile plots

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