Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ELLSWORTH HANCOCK 23 1 0.41 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
38 m
(124 ft) 		10 m
(32 ft) 		1,094 ha
(2,702 ac) 		108,000,000 m3
(87,557 ac-ft) 		61 km2
(23 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
2007 4.0 6.0 7.1 8.8 5
2008 3.3 6.3 6.8 7.2 3 3
2009 7.7 7.8 7.8 2
2010 3.2 7.4 7.8 8.0 2 2
2011 4.0 5.2 7.2 8.2 5
2012 7.6 7.7 7.9 2
2013 6.6 6.9 7.0 5
2014 7.3 7.7 8.0 3 1
2015 7.4 7.8 8.2 2
2016 7.0 7.6 8.2 5 4
2017 6.7 7.2 7.8 3 2

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
3.6 5.2 7.4 8.8 3.4 Inf 1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-08-20
2013-09-17
2014-08-12
2014-09-04
2015-09-18
2016-08-23
2016-09-16
2017-08-22
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 8.4 19 7.8 29 8.4 23 8.3 23 8.4 23 8.3 21 8.7 24 8.4
1 23 8.4 19 7.9 25 8.4 23 8.3 22 8.4 23 8.3 21 8.7 24 8.4
2 23 8.4 19 7.8 24 8.5 23 8.3 22 8.4 23 8.3 21 8.7 23 8.3
3 22 8.4 19 7.9 23 8.5 22 8.4 22 8.4 23 8.3 21 8.7 23 8.2
4 22 8.3 19 7.9 24 8.4 22 8.3 22 8.3 23 8.2 21 8.7 23 7.7
5 22 8.1 19 8.0 23 8.2 22 8.0 22 8.3 23 8.2 21 8.7 22 7.6
6 21 8.1 19 7.9 23 7.9 22 7.4 22 8.1 23 8.1 21 8.7 22 7.5
7 21 6.1 18 7.8 22 4.4 21 7.4 21 7.7 22 8.0 21 8.6 22 7.2
8 17 0.1 18 7.8 16 1.1 20 1.8 21 7.2 20 1.9 20 8.2 20 3.0
9 18 7.7 16 1.0

Recent temperature and dissolved oxygen profile plots

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