Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
ACTON YORK 2 1 0.84 flushes/yr 574 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		6 m
(19 ft) 		119 ha
(294 ac) 		6,756,766 m3
(5,478 ac-ft) 		9 km2
(3.5 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 13 4.5 5.8 7.0 6
1978 4.8 5.7 6.5 6
1979 13.0 37 6.0 5.5 5.9 6.5 5 2.5 2.5 2.5
1980 5.0 5.5 6.3 5
1981 5.7 6.6 7.5 5
1982 8.5 54 13.0 13 4.0 5.1 6.9 6 3.0 3.0 3.0
1983 4.7 5.7 6.5 5
1984 4.0 4.8 5.5 5
1985 6.0 6.8 8.1 3
1986 8.0 34 4.0 15 5.1 6.7 7.7 5
1987 5.0 5.6 5.8 2
1988 4.2 5.3 6.5 6
1989 4.0 5.1 6.5 5
1990 4.2 5.4 6.2 5
1991 7.5 42 7.0 7.0 4.8 5.5 6.8 6
1992 4.5 5.3 6.2 6
1993 8.0 5.5 13 5.6 6.2 7.7 6 1.5 2.4 3.4
1995 4.5 5.3 6.0 4
1997 5.2 6.1 6.8 4
1998 3.7 5.0 7.2 7
1999 9.0 52 11.0 25 4.5 6.0 7.6 7 4.2 4.2 4.2
2000 3.6 5.2 6.5 6
2001 4.7 5.4 6.5 6
2002 4.5 6.0 7.1 6
2003 4.7 6.4 8.4 4
2004 15 11.0 62 7.1 8.0 5.8 6.8 8.1 5 5.2 5.2 5.2
2005 5.5 6.5 7.1 5
2006 7 4.4 5.9 6.9 5
2007 6.2 7.3 8.1 4
2008 19 8.4 61 7.2 7.0 11 5.7 6.9 8.1 5 3.2 3.2 3.2
2009 9.0 13 5.8 6.4 6.8 3 2 3.2 3.2 3.2
2010 6.0 11 5.4 6.2 7.0 5 2.0 2.0 2.0
2011 5.6 6.6 7.4 4
2012 6.0 6.4 6.8 6
2013 5.5 6.6 7.7 5
2014 6.4 7.3 7.7 5
2015 9 12.0 78 7.2 4.0 10 6.5 6.8 7.4 3 4.8 4.8 4.8
2016 9 11.5 79 7.4 9.0 14 6.1 6.9 8.1 2 2.1 2.1 2.1
2017 10 11.5 91 7.2 9.0 6 5.6 6.6 7.5 5 2.1 2.1 2.1
2018 5 6.4 7.3 8.4 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
12 9.9 59 7.2 7.6 6 14 3.6 6.1 8.4 5 1.5 3.2 5.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-17
2017-08-10
2017-08-23
2017-09-07
2017-09-12
2018-08-06
2018-08-20
2018-09-04
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.3 25.8 8.2 22.5 7.6 19.9 8.0 20.5 8.6 27.9 8.9 24.9 8.2 26.5 7.5
1 25 8.3 24.8 8.2 22.5 7.7 19.9 8.0 20.2 8.6 27.8 8.9 24.9 8.2 26.2 7.5
2 25 8.2 24.0 8.3 22.4 7.7 19.9 8.0 19.9 8.7 27.2 9.0 24.9 8.2 25.5 7.5
3 25 8.2 23.8 8.3 22.4 7.7 19.9 8.0 19.8 8.6 26.9 9.0 24.8 8.2 25.1 7.6
4 25 8.2 23.4 8.3 22.3 7.6 19.9 8.0 19.7 8.5 26.3 9.0 24.8 8.2 24.6 7.6
5 25 8.2 21.6 8.8 21.8 7.4 19.8 8.0 19.5 8.5 23.6 10.1 23.8 8.4 23.8 7.8
6 23 7.6 15.4 5.0 19.2 5.7 19.8 8.0 19.3 8.4 19.5 13.6 19.8 11.2 21.4 9.2
7 19 6.9 13.7 3.9 14.8 3.2 16.8 4.0 17.3 4.4 14.0 4.5 14.4 11.4 16.5 10.3
8 16 6.2 11.9 2.4 12.3 1.8 15.3 2.0 13.6 2.5 11.1 10.7 11.2 8.7 12.1 7.6
9 13 0.6 11.0 1.4 11.0 0.5 11.4 0.3 10.7 0.8 9.7 8.6 9.5 5.4 10.4 4.0
10 13 0.5 10.1 0.4 10.2 0.1 10.5 0.1 10.2 0.4 8.4 3.8 8.7 2.6 9.1 1.6
11 12 0.4 9.7 0.1 9.8 0.1 10.0 0.1 10.0 0.2 8.0 2.1 8.3 1.2 8.7 0.8
12 11 0.4 9.7 0.1 9.7 0.1 9.7 0.0 7.9 1.6 8.0 0.7 8.4 0.2
13 11 0.4 9.6 0.1 7.8 1.4 8.2 0.2
14 11 0.4 9.5 0.1 7.7 1.0

Most recent temperature and dissolved oxygen profile plots

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