Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
NAPLES CUMBERLAND 4 1 10.81 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		5 m
(16 ft) 		297 ha
(734 ac) 		14,501,664 m3
(11,757 ac-ft) 		9 km2
(3.4 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
1976 9.0 6.7 7.3 7.6 3 0.9 1.5 2.3
1977 8.0 50 9.0 13.2 4.7 6.2 7.6 2 1.9 1.9 1.9
1978 12.0 6.5 6.5 6.5 2
1979 5.5 6.0 6.5 2
1980 6.0 8.0 8.0 8.0 1
1981 6.0 35 9.0 7.2 7.2 7.2 1 2.1 2.1 2.1
1984 5.0 5.7 6.5 5
1985 5.0 34 4.0 5.5 6.9 8.7 7
1986 5.5 6.8 8.5 6
1987 5.5 6.3 7.0 6
1988 10.0 9.9 4.0 5.8 6.3 7.0 5
1989 5.0 5.4 6.0 2
1990 8.9 6.7 6.1 4.0 6.0 7.5 4
1991 6.8 6.2 7.6 3.7 6.0 7.2 6 1.9 2.8 6.0
1992 6.6 5.3 7.1 8.5 5
1993 11.0 7.0 7.5 5.0 6.3 7.3 5 2.7 2.7 2.7
1994 10.0 6.8 6.0 10.6 4.5 5.5 6.9 4
1995 10.0 7.0 5.5 8.7 6.9 7.6 8.2 5
1996 9.5 6.8 6.8 5.2 6.0 6.9 6 1.6 2.2 2.9
1997 6.7 4.8 5.8 7.6 6 2.4 2.9 3.4
1998 8.0 6.6 5.0 7.3 4.6 5.6 6.3 5 1.7 1.7 1.7
1999 7.6 6.5 8.0 7.1 5.6 6.8 8.0 5 1 1.6 2.0 2.3
2000 12.5 6.8 56 6.5 6.8 12.5 5.5 6.6 8.2 6 2.5 3.0 4.4
2001 11.8 9.5 58 6.8 6.5 10.0 11.0 5.8 7.3 8.3 5 1.8 2.2 2.7
2002 8.9 8.6 63 6.8 6.3 15.0 6.3 7.6 9.0 6 1.0 2.2 3.1
2003 11.8 8.2 53 6.8 6.0 11.5 5.7 7.8 8.6 5 1.0 1.9 2.6
2004 19.3 8.2 43 6.7 5.6 9.5 5.4 6.4 7.3 5 1.4 2.6 4.1
2005 15.9 8.3 43 6.7 6.3 8.0 8.3 4.5 6.2 8.0 6 1.7 2.7 5.4
2006 16.7 7.6 39 6.8 7.0 11.0 5.5 6.2 7.6 5 2.3 2.7 3.2
2007 12.5 7.0 37 6.7 6.4 11.0 5.3 6.2 7.5 5 1.8 2.5 3.5
2008 10.7 8.4 38 6.5 5.4 8.7 6.0 6.9 7.8 5 1.8 2.7 3.5
2009 12.3 9.1 35 6.7 8.4 8.4 5.2 6.3 7.1 6 1.2 2.6 3.9
2010 9.3 10.1 34 6.7 6.8 12.0 5.0 6.8 7.4 6 1.6 2.5 4.1
2011 15.1 8.2 34 6.7 7.7 9.3 5.1 6.4 7.6 6 1.6 2.4 3.9
2012 13.9 7.4 38 6.8 6.1 13.0 5.3 6.6 8.0 8 2.0 2.5 3.3
2013 15.2 7.9 40 6.7 6.2 10.5 5.1 6.4 7.5 6 1.1 2.9 3.8
2014 25.8 8.0 47 6.6 5.9 11.3 5.0 6.2 7.0 7 2.5 3.7 8.2
2015 23.3 8.6 50 6.8 5.1 11.0 6.0 7.2 7.7 7 2.4 2.7 3.0
2016 23.2 8.5 50 6.8 5.3 15.0 6.2 7.2 7.9 5 1.4 2.0 3.1
2017 22.9 8.2 50 6.6 6.2 8.3 5.7 6.4 7.6 5 1.7 2.6 3.6

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
16 8.5 44 6.7 6.5 10 9 3.7 6.5 9 4.9 0.9 2.5 8.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-01
2015-09-16
2016-08-09
2016-08-30
2016-09-13
2017-08-01
2017-08-15
2017-09-12
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 7.8 24 8.2 26 8.0 25 8.0 23 8.1 25 8.3 24 8.2 21 7.9
1 25 7.7 24 8.2 25 8.0 25 8.0 23 8.0 25 8.3 24 8.2 20 7.8
2 25 7.7 23 8.1 25 7.9 24 7.9 23 8.0 25 8.3 24 8.2 20 7.8
3 25 7.7 23 8.1 25 7.9 24 7.9 23 7.9 24 8.3 24 8.2 20 7.8
4 25 7.7 23 8.1 25 7.8 24 7.8 23 7.9 24 8.1 24 8.1 20 7.7
5 25 7.7 23 8.1 25 7.7 24 7.8 23 7.9 22 7.0 24 8.1 20 7.7
6 24 5.8 23 8.1 24 7.6 24 7.7 23 7.8 18 5.5 21 5.3 20 7.7
7 22 3.2 23 7.8 21 3.3 24 7.6 23 7.5 15 3.0 17 2.6 20 7.6
8 19 0.1 20 0.1 19 1.3 23 5.4 22 7.5 14 1.9 14 0.8 19 7.1
9 18 0.1 18 0.1 18 0.4 20 0.5 22 6.5 13 1.6 14 0.8 16 0.9
10 17 0.1 17 0.1 17 0.3 18 0.3 18 0.6 13 1.5 13 0.5 14 0.1
11 16 0.1 17 0.1 17 0.3 17 0.3 17 0.4 13 1.4 13 0.3 13 0.1
12 16 0.1 16 0.1 16 0.3 16 0.4 13 1.1 13 0.3 13 0.1
13 16 0.1 13 1.1 13 0.2 13 0.1

Recent temperature and dissolved oxygen profile plots

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