Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ACTON YORK 2 1 0.47 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		6 m
(21 ft) 		340 ha
(840 ac) 		22,169,177 m3
(17,973 ac-ft) 		15 km2
(5.9 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 9.0 47 9 7.7 7.2 7.9 8.6 2 3.5 3.5 3.5
1982 9.0 44 9 6.5 6.6 6.8 2 2.0 2.0 2.0
1983 55 14 9.0 5 5.5 6.8 8.2 6 1.9 3.4 7.3
1984 8.0 4.2 6.3 8.2 8
1985 4.2 6.2 8.8 8
1986 8.0 25 4 7 5.0 6.4 9.1 9
1987 5.1 6.2 8.1 5
1988 18 4.0 5.3 6.7 7
1989 4.2 5.1 6.5 8
1990 6.8 4.7 5.6 8.0 9
1991 22.5 37 7.0 8 4.5 6.0 7.5 9
1992 12.0 40 7.2 7 11 5.5 6.7 7.8 6 1.0 2.2 3.3
1993 5.0 6.2 7.8 6
1994 4.1 5.1 6.5 4
1995 4.9 6.2 7.1 4
1998 9.5 41 9 8 5.1 5.8 6.4 1 2.7 2.7 2.7
2005 6.2 7.3 7.8 5
2006 5.4 6.1 6.9 5
2007 6.7 7.3 8.1 6
2008 10 7.0 49 7.0 7.0 6.3 6.9 8.0 6
2009 5.5 6.8 9.5 6
2010 6.6 7.1 7.8 4
2011 5.4 6.4 7.6 6
2013 8 7.9 54 7.2 5 7 7.2 7.2 7.2 1 2.3 2.3 2.3
2014 6.3 7.4 8.4 5
2015 6.6 7.9 9.1 6
2016 4.5 6.4 7.6 8.7 5
2017 6 9.0 83 7.1 6 5.0 9 7.3 7.3 7.3 1 2.6 2.6 2.6

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 10 48 7 8.8 6.4 8 7.7 4 6.6 9.5 5.4 1 2.7 7.3

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1992-08-20
1992-08-28
1992-09-11
1992-09-26
1998-08-13
2013-08-15
2015-08-24
2017-09-12
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20.2 9.1 24 9.7 21 11.5 18 8.2 26 8.1 23 8.3 26 7.7 21 8.7
1 20.2 9.0 24 9.7 21 11.5 18 8.2 25 8.1 23 8.2 26 7.8 21 8.7
2 20.2 9.0 24 9.5 21 11.3 18 8.1 25 8.2 23 8.2 26 7.7 20 8.8
3 20.2 9.0 24 9.6 20 11.5 18 8.0 24 8.1 23 8.3 25 7.7 20 8.8
4 20.1 9.0 22 9.6 20 11.4 18 7.9 24 8.1 23 8.4 25 7.7 20 8.8
5 20.1 9.0 22 9.6 20 10.6 18 7.8 24 7.9 23 8.3 25 7.7 20 8.9
6 20.1 9.0 21 9.4 20 10.7 18 7.9 22 6.7 22 8.3 25 7.7 20 8.8
7 20.1 9.0 21 9.1 20 10.6 18 7.9 18 4.0 21 7.1 23 7.9 20 8.7
8 20.0 9.0 19 6.8 19 8.5 18 7.9 16 2.6 17 4.9 20 8.4 19 8.4
9 12.0 5.6 16 3.4 17 3.4 18 7.9 15 1.6 15 2.3 16 7.2 17 4.1
10 11.0 3.4 15 0.5 16 0.5 18 0.6 14 0.1 13 0.2 14 3.7 13 2.8
11 10.1 1.0 12 0.9 12 1.9
12 9.6 0.4 11 0.3 11 0.4

Recent temperature and dissolved oxygen profile plots

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