Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
WATERBORO YORK 2 1 0.59 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
23 m
(74 ft) 		7 m
(22 ft) 		182 ha
(450 ac) 		12,368,135 m3
(10,027 ac-ft) 		12 km2
(4.7 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
1977 5 6.1 6.1 6.1 1
1978 9.7 38 15 6.5 7.5 8.5 2 1.5 1.5 1.5
1980 5.0 6.7 8.2 5
1981 11.5 39 8 19 5.6 7.1 9.0 6 1.9 1.9 1.9
1982 5.8 6.4 7.3 7
1983 5.9 6.5 7.3 7
1984 6.0 4.4 6.1 7.0 6 2.5 2.5 2.5
1985 6.1 6.6 7.3 5
1986 6.1 6.4 7.0 7
1987 10.0 42 7 53 5.8 6.7 8.5 7
1988 4.6 5.1 5.5 3
1989 5.2 6.1 6.7 6
1992 11.5 34 7.9 5 6.4 7.7 9.1 5 0.9 0.9 0.9
1993 7.5 8.1 8.8 5
1994 5.5 7.1 8.0 6
1995 5.0 7.4 9.7 6
1996 11.0 4 58 5.0 7.5 9.9 8 1.5 1.5 1.5
1997 5.4 8.0 10.3 6
1998 11.0 62 6 18 5.8 7.2 8.9 8 2.5 2.5 2.5
1999 4.9 7.9 10.2 8
2000 13 24 5.4 7.3 8.7 6 3.2 3.2 3.2
2001 6.0 7.7 9.1 5
2002 8 14.2 76 6 16 7.1 7.7 8.8 4 1.7 1.7 1.7
2003 5.5 7.7 9.3 5
2004 6.7 8.2 10.1 7
2005 5.0 7.4 8.9 5
2006 5.6 5.9 7.9 9.9 9
2007 6.1 7.9 10.4 7
2008 12 8.8 75 6.9 3 4.0 15 6.5 7.7 10.2 7 2.8 2.8 2.8
2009 5.4 5.8 8.4 11.9 7
2010 4.9 6.2 8.1 9.8 6
2011 5 5.9 22 6.0 8.1 9.6 7 2.1 2.1 2.1
2012 3.7 6.3 7.9 10.6 4
2013 4.2 7.1 8.9 10.8 6
2014 7.0 9.2 10.6 5
2015 5 11.0 83 7.3 4 4.5 13 8.3 9.9 11.1 6 1.3 1.3 1.3
2016 5.3 8.0 9.9 10.8 6
2017 5.0 5.6 8.5 10.9 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
8.3 10 56 7.2 6.1 4.8 24 15 4.4 7.5 12 5.8 0.9 2 3.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-30
2016-08-15
2016-08-28
2016-09-10
2017-08-12
2017-08-27
2017-09-09
2017-09-16
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.2 7.8 26.2 7.6 26 7.9 24.1 8.1 24.5 8.4 23.5 8.1 20.8 8.8 23.0 9.1
1 25.1 7.8 26.2 7.6 26 7.9 23.9 8.1 24.5 8.3 23.4 8.1 20.8 8.7 22.2 9.2
2 25.1 7.8 26.1 7.6 26 7.9 23.8 8.1 24.5 8.3 23.3 8.1 20.7 8.8 21.9 9.2
3 25.0 7.8 26.1 7.6 26 7.9 23.8 8.1 24.4 8.3 23.3 8.1 20.7 8.8 21.2 9.2
4 24.9 7.8 26.1 7.6 25 7.9 23.7 8.1 24.4 8.3 23.3 8.1 20.6 8.8 20.9 9.3
5 24.9 7.8 25.8 7.6 25 7.9 23.6 8.1 24.1 8.3 23.3 8.1 20.5 8.8 20.8 9.3
6 24.4 8.0 23.4 8.1 24 7.9 23.5 8.0 19.9 11.4 22.7 8.6 20.4 8.7 20.6 9.2
7 19.4 11.9 19.7 9.2 23.2 7.9 16.4 12.4 16.6 12.4 18.8 9.8 19.6 9.3
8 15.3 13.4 15.9 10.0 17.5 10.2 12.3 13.5 13.0 12.7 14.0 12.9 14.4 13.2
9 12.3 13.9 13.7 11.2 14.4 11.4 9.7 14.1 10.5 13.2 10.3 13.4 10.5 14.2
10 10.2 13.8 11.8 12.1 12.4 12.4 8.4 11.8 8.5 9.4 8.7 9.1 8.7 9.3
11 8.8 9.4 10.1 12.9 10.7 12.5 7.4 9.4 7.6 7.7 7.5 7.8 8.1 7.9
12 7.4 6.6 9.4 12.3 9.7 12.0 6.6 7.6 7.0 7.5 6.9 7.6 7.5 7.3
13 7.1 5.9 8.5 8.0 8.3 5.6 6.1 7.7 6.5 7.2 6.5 7.6 7.0 7.9
14 6.6 4.8 7.9 6.9 7.8 4.7 5.7 7.7 6.0 7.3 6.1 7.3 6.4 6.4
15 6.1 4.0 7.5 5.3 7.5 4.2 5.5 7.5 5.8 5.9 5.8 7.0 5.9 5.1
16 5.7 3.2 7.1 2.5 7.4 3.5 5.4 6.6 5.5 6.3 5.6 5.0 5.7 4.4
17 5.4 0.5 7.0 0.6 7.1 1.0 5.3 5.0 5.4 4.0 5.4 2.1 5.5 1.0
18 5.2 0.2 6.8 0.2 6.9 0.4 5.2 1.4 5.3 0.6 5.3 0.5 5.4 0.5
19 5.1 0.1 6.7 0.1 6.8 0.2 5.1 0.3 5.2 0.4 5.2 0.5 5.3 0.5
20 5.0 0.1 6.6 0.1 6.6 0.2 5.1 0.3 5.1 0.4 5.2 0.5 5.2 0.4

Recent temperature and dissolved oxygen profile plots

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