Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
VIENNA KENNEBEC 20 1 1.6 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
24 m
(80 ft) 		8 m
(25 ft) 		156 ha
(385 ac) 		11,861,943 m3
(9,617 ac-ft) 		15 km2
(5.7 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 8.2 4.0 4.5 5.3 6 2.2 3.2 4.6
1979 7 3.3 4.4 5.7 6
1980 11.5 40 9.0 12 3.2 4.5 5.5 7 3.5 3.5 3.5
1981 7.0 17 3.1 3.7 4.3 6 1.6 3.5 5.9
1982 3.4 4.4 5.4 6
1983 12.0 7.0 7 3.3 4.8 6.4 4 1.7 1.7 1.7
1984 2.5 4.2 5.7 5
1985 3.6 4.2 4.9 2
1986 3.4 4.0 5.2 5
1987 3.1 4.3 5.3 7
1988 3.0 4.5 5.5 6
1989 2.1 3.5 4.7 6
1990 3.1 3.7 4.3 5
1991 13.5 44 7.3 8.0 3.0 4.3 5.8 6
1992 3.7 4.8 5.7 6
1993 15.5 52 7.2 6.0 3.8 5.0 5.8 6 4.6 4.6 4.6
1994 8.0 14 4.3 4.8 5.5 6 1.0 3.7 5.2
1995 10.8 8.5 16 3.5 4.7 6.3 6
1996 9.3 9 13.1 16 2.9 3.8 4.9 6 0.1 2.9 5.9
1997 2.9 4.1 4.8 3
1998 8.0 3.8 4.0 4.1 2
1999 7.3 4.7 5.5 6.7 3
2000 11.7 4.0 4.3 4.9 3 2.0 2.7 4.2
2001 10.0 51 7.4 8.7 13 4.5 5.3 5.9 3 1.1 3.3 7.7
2002 10.0 4.6 5.0 5.3 2 1.8 1.8 1.8
2004 40.0 8.7 5.0 5.7 6.4 5 1.0 1.0 1.0
2006 20 12.6 53 7.4
2007 12 12.1 54 7.4 6.0 6.0 6.2 6.4 1 1.8 1.8 1.8
2010 11.2 4.9 5.4 6.0 4 1.2 5.3 14.0
2011 11.0 5.0 5.0 5.1 1 2.0 2.0 2.0
2012 52 6.5 13.0 4.0 4.3 4.5 3 5.7 5.9 6.1
2013 29 13.8 56 7.3 9.0 18 3.8 3.9 4.0 1 2.9 2.9 2.9
2014 4.0 4.4 4.8 3
2015 12.0 4.8 5.2 5.7 3 1.2 2.7 5.0
2016 4.6 5.3 6.5 5
2017 12 4.6 5.6 7.2 4

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
20 14 46 7.1 9.3 9.2 14 2.1 4.6 7.2 4.4 0.1 3.1 14

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-08-29
2014-08-24
2014-09-28
2015-08-31
2016-08-10
2016-09-26
2017-08-27
2017-09-24
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.6 8.6 23.2 8.8 19.1 9.2 24.5 8.2 24.9 7.7 19.8 8.1 22.8 9.6 21.7 8.4
1 23.6 8.5 22.6 9.1 17.8 9.4 24.4 8.1 24.9 7.7 19.3 8.1 22.7 9.3 20.7 8.9
2 23.6 8.5 21.0 9.2 16.8 9.1 24.1 8.1 24.7 7.7 19.1 8.1 22.3 9.6 20.4 8.9
3 21.2 10.4 18.6 6.7 16.3 8.5 23.9 7.9 24.7 7.7 19.0 8.1 22.1 9.5 20.2 8.9
4 17.8 5.7 16.3 4.5 15.9 8.0 23.2 8.7 24.7 7.7 18.9 8.1 21.7 9.2 19.8 8.5
5 14.2 3.5 13.3 3.7 13.8 3.1 15.2 8.0 18.6 9.3 18.8 8.0 13.2 8.1 16.2 6.7
6 10.7 3.4 8.7 4.5 9.5 2.2 10.6 6.4 13.6 7.4 18.1 7.3 9.2 6.2 10.7 4.2
7 9.4 4.1 7.5 5.0 7.8 2.8 8.4 5.4 11.0 6.3 11.0 3.0 4.9 7.7 7.4 2.7
8 8.1 4.2 7.3 4.9 7.1 3.1 7.3 4.7 9.1 5.4 8.9 2.6 4.1 6.9 7.2 2.5
9 7.4 4.1 6.6 4.9 6.8 3.1 6.9 4.6 7.9 5.2 8.1 2.4 4.1 6.5 6.8 2.4
10 7.2 4.3 6.4 5.0 6.6 3.1 6.8 4.7 7.5 5.2 7.7 2.7 4.1 6.2 6.5 2.6
11 7.1 4.3 6.2 4.7 6.4 3.1 6.7 4.6 7.2 5.1 7.3 2.4 5.6 3.6 6.3 2.7
12 6.9 4.6 5.9 4.5 6.1 2.8 6.4 4.6 6.8 5.0 6.8 2.4 5.6 3.8 6.0 2.4
13 6.8 4.6 5.6 4.1 5.8 2.5 6.1 4.4 6.5 4.9 6.5 2.5 5.6 3.5 5.8 2.1
14 6.6 4.5 5.3 4.0 5.6 2.3 6.2 4.3 6.6 4.8 6.4 2.4 5.5 3.4 5.5 1.8
15 6.2 4.2 5.3 3.7 5.5 1.5 5.7 4.1 6.1 4.3 6.2 2.1 5.4 3.1 5.4 1.4
16
17 5.8 3.5 6.0 3.1
18 5.7 2.8
19 5.6 1.8 6.0 3.0
20 5.1 0.1 5.3 1.0 5.5 0.2 5.9 0.8 5.2 0.2 5.2 1.5
21 5.6 0.4 5.9 0.2
22
23 5.6 0.3
24
25 5.1 0.1 5.3 0.5 5.5 0.1 5.9 0.1 5.9 0.7 5.2 0.1 5.3 1.0

Recent temperature and dissolved oxygen profile plots

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