Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
AUGUSTA KENNEBEC 13 1 0.81 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
15 m
(49 ft) 		5 m
(18 ft) 		260 ha
(642 ac) 		13,909,671 m3
(11,277 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 14 4.60 5.4 6.8 7 1.9 3.2 4.7
1977 10.0 47 11 14 13 3.20 4.1 5.0 2 3.3 7.2 11.2
1978 8.0 64 17 15 24 0.60 3.4 6.0 7 2.8 8.0 36.7
1979 13.7 37 21 120 45 1.10 3.4 4.7 7 1.2 10.7 34.5
1980 13.6 52 22 52 2.40 3.5 4.7 8 5.9 8.7 13.9
1981 9.0 60 32 3.50 4.5 6.0 6 3.5 4.4 5.6
1982 8.0 55 4.00 5.1 6.4 5 3.2 3.2 3.3
1983 4.50 5.7 7.2 5
1984 3.00 5.1 7.0 6
1985 3.50 5.3 7.3 4
1986 9.0 53 14 100 1.10 3.8 6.1 5
1987 9.0 39 62 0.90 3.6 5.0 7 6.1 15.3 29.0
1988 42 2.60 4.6 6.5 7 2.9 6.4 10.5
1989 21 3.50 5.4 7.7 5 4.0 6.9 10.1
1990 10.5 50 7.0 29 5.00 5.8 8.5 6 3.5 4.8 6.4
1991 19 107 46 4.50 5.3 6.3 6 3.5 6.8 11.5
1992 12 18 4.00 5.2 7.0 7 1.8 1.8 1.8
1993 4.00 5.2 6.1 6
1998 12.0 50 16 56 3.80 4.2 4.6 4 8.8 8.8 8.8
1999 32 0.55 4.7 7.5 7 9.3 9.3 9.3
2000 12.0 55 19 59 1.60 2.9 4.1 6 10.0 13.5 17.0
2001 11.0 54 7.3 14 26 1.62 3.2 5.0 4 5.0 7.0 9.1
2002 19.0 13.0 57 10 47 3.50 4.7 5.5 4 5.1 5.1 5.1
2003 4.0 13.0 58 16 35 28 1.45 3.5 6.2 10 3.0 13.1 27.0
2004 6.9 14.4 66 21 69 1.25 2.5 5.2 7 2.2 24.5 38.9
2005 9.5 62 7.3 18 160 3.90 3.9 3.9 1 12.0 12.0 12.0
2007 13 230 3.12 4.4 5.7 5 3.5 3.5 3.5
2008 20 270 1.43 1.4 1.4 1 28.0 28.0 28.0
2009 23 79 3.00 3.7 4.3 2 25.0 25.0 25.0
2010 18 1.92 1.9 1.9 1 19.0 20.0 21.0
2015 2.0 12.0 60 7.1 20 216 1.43 3.2 5.5 6 18.0 18.0 18.0
2016 12.0 70 7.2 15 178 4.56 4.6 4.6 1 7.2 7.2 7.2
2017 6.0 12.0 80 7.3 17 3.60 4.0 4.9 4 8.3 8.3 8.3

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
7.6 11 56 7.2 17 15 113 37 0.6 4.2 8.5 5.1 1.2 10 39

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-02
2015-08-23
2015-09-07
2015-09-24
2016-09-09
2017-08-27
2017-08-30
2017-09-16
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.4 8.7 25 9.6 24 9.8 22 8.1 24 9.0 23 7.9 22 8.7
1 25.3 8.8 25 9.6 24 9.8 22 8.1 24 9.1 23 7.8 22 8.7 21 9.0
2 25.1 8.9 25 9.6 24 9.8 22 8.0 24 9.1 23 7.7 22 8.5 21 9.0
3 24.9 8.9 25 9.6 24 9.8 21 7.8 24 9.0 23 8.0 22 8.5 20 9.0
4 23.8 8.6 25 9.5 24 9.6 21 7.8 23 9.0 22 8.5 20 8.9
5 22.9 7.8 24 6.5 23 5.6 21 7.7 23 7.4 23 7.8 22 8.5 20 8.9
6 22.1 5.5 22 1.7 22 1.1 21 7.4 23 7.4 23 6.3 22 8.4 20 8.5
7 19.9 0.6 20 0.0 21 0.0 20 4.8 22 5.6 19 0.1 20 0.6 19 5.3
8 16.9 0.0 17 0.0 19 0.0 18 0.6 21 1.0 16 0.1 17 0.3 18 2.6
9 15.5 0.0 14 0.0 14 0.0 15 0.5 18 0.5 13 0.1 14 0.3 17 0.8
10 12.1 0.0 13 0.0 13 0.0 14 0.4 16 0.3 12 0.1 13 0.2 13 0.1
11 11.2 0.0 11 0.0 12 0.0 12 0.4 15 0.3 12 0.1 12 0.2 12 0.1
12 10.6 0.0 11 0.0 11 0.0 12 0.4 14 0.3 11 0.1 12 0.2 11 0.1
13 10.3 0.0 10 0.0 11 0.0 11 0.4 13 0.2 11 0.1 11 0.2 11 0.1
14 9.9 0.0 10 0.0 10 0.0 11 0.4 13 0.2 11 0.0 11 0.2 11 0.1
15 9.9 0.0 10 0.0 10 0.0 10 0.3 13 0.2 11 0.0 11 0.1

Recent temperature and dissolved oxygen profile plots

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