Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
NAPLES CUMBERLAND 4 1 0.14 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(57 ft) 		10 m
(33 ft) 		122 ha
(301 ac) 		12,468,135 m3
(10,108 ac-ft) 		2 km2
(0.8 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 11.8 31 6.0 8.0 4.80 4.80 4.8
1979 7.0 18
1980 8.0 10.3 12 6 0.70 0.87 1.3
1981 8.0 10.1 12 7
1982 5.0 9.9 12 7
1983 7.5 9.9 12 8
1984 7.5 9.8 12 7
1985 8.0 10.7 13 7
1986 1 7 7.3 9.6 11 6
1987 8.5 10.6 12 7
1988 7.0 7.3 6.4 9.6 13 7
1989 8.0 9.4 11 6
1990 7.3 6.6 7.1 9.4 12 7
1991 7.2 14 7.1 9.8 12 6 1.00 1.70 2.4
1992 9.0 10.4 11 6
1993 11.0 6.7 6.0 9.5 10.6 12 5 1
1994 8.0 6.9 4.5 9.0 6.4 10.2 12 5
1995 8.4 6.9 2.5 10.2 7.4 10.2 13 6
1996 9.5 6.7 6.0 7.3 11.0 15 6 0.50 0.60 0.7
1997 5.7 9.8 12.9 15 7 0.62 0.97 1.2
1998 6.1 6.5 6.0 4.4 9.1 11.4 13 7 1.14 1.14 1.1
1999 4.9 6.6 6.0 6.0 8.2 9.9 11 6 1.38 2.91 6.7
2000 6.0 5.7 45 6.6 4.3 13.0 8.3 10.8 12 9 0.90 1.33 1.6
2001 5.6 7.9 48 6.9 5.1 15.2 6.4 9.6 11 5 1.00 1.17 1.5
2002 4.1 6.8 45 6.8 6.0 10.0 7.8 10.6 12 11 1.00 1.20 1.4
2003 18.8 6.6 40 6.6 6.2 11.8 7.1 9.4 12 7 1.00 1.29 1.9
2004 4.8 6.5 34 6.8 6.1 11.3 5.1 9.4 12 8 0.80 1.42 2.1
2005 8.1 7.8 37 6.8 4.9 10.7 6.9 9.6 12 7 1.00 1.47 1.8
2006 5.5 7.0 38 6.8 6.3 18.0 7.2 9.6 11 6 1.00 2.02 2.9
2007 5.3 6.6 34 6.8 6.3 17.0 8.0 9.8 11 7 0.70 2.04 3.5
2008 3.1 8.0 33 6.7 4.5 11.7 7.0 9.2 11 6 1.30 2.05 2.7
2009 3.4 7.7 32 6.8 4.7 13.0 7.0 9.9 11 7 1.40 1.94 2.8
2010 5.6 10.1 34 6.8 5.2 7.7 6.8 9.6 11 8 1.00 1.64 3.4
2011 8.4 8.7 34 6.7 5.3 7.7 7.0 9.6 13 7 1.00 1.72 2.5
2012 4.8 6.2 36 6.8 5.7 12.0 7.4 9.8 11 7 1.00 2.28 3.6
2013 5.4 6.5 36 6.7 5.1 8.7 8.4 9.4 10 6 1.00 1.58 1.9
2014 13.6 6.9 44 6.7 4.8 8.0 7.4 9.1 11 7 0.50 2.23 3.8
2015 10.2 7.6 43 6.7 4.1 9.3 7.6 9.6 11 7 1.40 2.74 6.5
2016 13.6 7.8 43 6.8 4.8 10.7 6.6 9.6 12 5 3 0.90 1.52 2.5
2017 13.3 8.2 45 6.8 5.6 8.3 7.6 9.3 11 8 1.30 1.72 2.5

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
7.8 7.6 38 6.7 5.3 1 11 10 5 10 15 6.8 0.5 1.8 6.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-01
2015-09-15
2016-08-01
2016-08-16
2016-09-06
2017-08-02
2017-08-17
2017-09-08
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.1 7.9 24.0 8.7 25.7 8.2 25 8.3 23 8.6 25.3 8.3 23.6 8.5 20.6 8.9
1 25.1 7.9 23.6 8.7 25.7 8.2 25 8.3 23 8.6 24.8 8.4 23.6 8.5 20.5 8.9
2 25.0 7.9 23.6 8.7 25.7 8.2 25 8.3 23 8.5 24.6 8.4 23.6 8.5 20.4 8.9
3 25.0 7.9 23.5 8.7 25.7 8.2 25 8.2 23 8.5 24.5 8.4 23.7 8.5 20.4 8.9
4 25.0 7.9 23.4 8.7 25.6 8.2 25 8.2 23 8.5 24.4 8.4 23.6 8.5 20.4 8.9
5 25.0 7.9 23.4 8.7 25.6 8.2 25 8.2 23 8.5 24.2 8.4 23.6 8.4 20.4 8.9
6 24.9 7.8 23.4 8.7 25.6 8.2 25 8.2 23 8.5 23.8 8.5 23.6 8.4 20.3 8.8
7 24.6 7.9 23.3 8.6 23.0 9.3 24 8.1 23 8.4 20.1 11.3 23.6 8.4 20.3 8.8
8 21.5 10.0 23.3 8.6 19.1 10.5 21 9.6 23 8.4 16.5 12.4 18.4 11.6 20.3 8.8
9 16.9 12.4 18.7 12.9 16.6 11.2 17 10.8 21 9.6 13.9 13.0 15.2 12.2 17.7 11.3
10 13.9 13.1 14.5 13.9 13.8 11.5 15 11.2 16 11.1 11.7 13.0 12.1 12.4 14.4 12.1
11 12.0 13.2 12.6 13.4 12.1 11.1 14 11.2 13 10.8 9.9 11.6 10.9 11.8 12.3 12.2
12 10.5 10.4 11.1 11.7 10.8 8.9 12 10.9 12 9.2 9.1 9.4 9.9 9.1 10.5 9.5
13 9.5 5.0 10.0 5.8 10.4 7.2 11 9.0 12 7.0 8.6 6.5 9.0 5.4 9.7 5.1
14 9.2 2.4 9.5 3.0 10.2 6.1 11 7.4 11 4.0 8.4 5.0 8.6 3.4 9.0 2.3
15 8.9 0.4 9.1 0.5 9.9 4.3 10 4.5 10 0.8 8.2 3.7 8.3 2.3 8.6 0.8
16 8.6 0.1 8.8 0.2 9.7 2.0 10 0.7 10 0.5 7.9 1.3 8.1 0.9 8.5 0.5
17 8.4 0.1 7.8 0.1 8.0 0.3 8.2 0.3

Recent temperature and dissolved oxygen profile plots

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