Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
WILTON FRANKLIN 19 1 2.58 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
27 m
(88 ft)
8 m
(27 ft)
194 ha
(479 ac)
16,000,000 m3
(12,971 ac-ft)
66 km2
(26 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
1974 9.6 2.4 4.2 5.9 6 1.3 2.8 4.0
1975 7.5 21 6.8 3.8 4.8 5.9 8 0.8 3.2 5.2
1976 7.5 12 2.7 4.4 5.5 7 1.4 3.1 6.2
1977 7 5.0 5.0 5.0 1
1980 3.0 5.0 6.5 4
1981 8.5 32 7.0 12 6.3 6.3 6.3 1 3.3 3.3 3.3
1982 5.0 5.2 5.2 4
1983 4.4 5.0 5.4 5
1984 5.0 7.0 14 5.4 5.4 5.4 1 5.4 5.4 5.4
1985 4.2 5.1 5.7 5
1986 4.3 5.3 6.5 5
1987 8.0 30 9.0 17 4.5 5.3 6.1 4
1988 4.8 6.0 7.1 5
1989 2.6 4.6 5.5 5
1990 3.8 5.4 7.0 6
1991 7.0 36 7.1 7.0 4.7 5.6 6.7 5
1992 4.5 6.0 7.4 5
1993 4.7 5.6 7.2 5
1994 4.0 5.1 6.8 6
1995 4.1 5.7 6.6 6
1996 3.5 4.6 5.5 6
1997 5.0 40 7.1 8.0 3.4 5.2 5.8 6 13.0 13.0 13.0
1998 2.5 4.6 5.8 6
1999 6.0 42 11.0 14 4.8 6.1 7.4 5 3.7 3.7 3.7
2000 6.0 40 9.0 4.5 5.3 6.1 5 6.3 6.3 6.3
2001 4.8 5.6 6.7 6
2002 4.9 6.5 8.2 4
2003 4.5 5.9 7.5 6
2004 4.5 5.9 6.8 5
2005 10 6.1 37 7.1 9.0 4.0 5.4 6.4 5
2006 3.6 5.2 6.6 6
2007 5.0 6.2 7.4 6
2008 3.5 4.8 5.7 4
2009 8.0 3.2 4.8 6.1 6 6.9 6.9 6.9
2010 4.5 5.7 7.3 5
2011 6.0 2.5 4.7 6.2 5 3.6 3.6 3.6
2012 2.6 4.6 6.0 4
2013 3.6 4.2 4.7 4
2014 3.0 4.1 4.6 4
2015 4.0 4.4 5.4 6.7 5 6.0 6.0 6.0
2016 8.0 5.0 4.0 5.3 6.8 6 6.9 6.9 6.9
2017 8 9.0 46 6.6 8.0 4.0 5.0 6.0 5 4.2 4.2 4.2

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
9 6.8 36 6.9 7.7 7.6 13 2.4 5.2 8.2 5 0.8 5.3 13

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-10
2015-08-18
2015-09-08
2016-08-11
2016-08-12
2016-08-30
2017-08-22
2017-09-02
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.7 8.5 26.3 8.0 25.1 8.0 23.9 8.5 24.8 8.5 22.8 8.5 23.0 8.7 18.9 8.5
1 23.4 8.5 25.3 7.9 24.9 8.0 23.7 8.5 24.7 8.4 22.9 8.5 23.0 8.7 18.7 8.5
2 23.0 8.5 24.4 8.2 24.4 8.1 23.7 8.4 24.4 8.5 22.8 8.6 22.7 8.6 18.4 8.5
3 22.9 8.5 23.6 8.3 24.2 8.1 23.6 8.4 24.3 8.5 22.7 8.5 22.4 8.6 18.4 8.5
4 22.7 8.5 23.2 8.4 24.2 8.1 23.5 8.4 24.1 8.4 22.7 8.4 22.3 8.5 18.3 8.4
5 22.5 8.4 22.4 8.4 23.7 8.0 23.4 8.4 23.5 8.5 22.6 8.4 22.0 8.3 18.3 8.4
6 20.4 8.4 21.0 7.9 22.6 7.5 23.1 8.4 22.7 8.5 22.6 8.4 21.1 7.7 18.3 8.4
7 16.5 4.8 16.4 4.6 17.1 4.4 19.1 8.5 17.6 7.8 20.9 6.7 15.0 4.9 18.2 8.4
8 12.7 5.3 13.8 4.4 14.6 3.0 15.6 6.3 14.9 6.1 18.1 5.0 12.2 5.0 13.6 5.3
9 11.7 5.8 12.1 5.0 12.2 3.9 13.9 5.5 13.5 5.4 15.0 4.2 10.5 5.6 11.1 5.3
10 10.8 6.2 10.7 5.9 10.6 5.0 12.5 5.8 12.7 5.6 12.9 4.7 9.2 6.2 9.4 6.0
11 10.2 6.4 9.7 6.4 9.7 5.6 11.3 6.1 11.8 6.2 10.9 5.6 8.5 6.5 8.4 6.5
12 9.5 6.6 9.1 6.8 8.9 5.9 10.7 6.3 11.2 6.3 10.5 5.7 7.9 6.6 7.9 6.7
13 8.9 6.8 8.3 6.9 8.4 6.2 10.0 6.3 10.6 6.6 9.7 5.4 7.5 6.5 7.3 6.4
14 7.8 6.9 7.6 6.9 7.5 6.4 9.5 6.1 10.1 6.7 9.4 5.3 7.2 6.2 7.0 5.8
15 7.5 6.8 7.2 6.8 7.0 6.1 9.3 6.0 9.4 6.4 9.2 5.0 7.1 5.9 6.9 5.5
16 7.2 6.6
17 6.9 6.4 6.7 6.2 6.6 5.0 8.8 4.9 8.8 5.1 8.8 3.4 6.9 5.8 6.7 5.2
18 6.8 6.2
19 6.6 6.0 6.5 5.3 6.5 4.3 8.7 3.8 8.7 3.9 8.7 2.8 6.7 5.0 6.6 4.4
20 6.6 5.8
21 6.5 5.7 6.4 4.9 6.5 4.0 8.6 3.4 8.6 3.2 8.6 2.2 6.6 4.4 6.5 3.7
22 6.5 5.5
23 6.5 1.0 6.4 3.7 8.5 3.1 8.5 2.9 8.6 2.1 6.5 4.3 6.5 3.5
24
25 6.5 1.0 8.5 2.7 8.5 1.7 8.5 1.6 6.5 4.0
26 6.5 3.5

Recent temperature and dissolved oxygen profile plots

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