Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ACTON YORK 2 2 17.92 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
30 m
(98 ft) 		7 m
(22 ft) 		89 ha
(220 ac) 		2,232,724 m3
(1,810 ac-ft) 		23 km2
(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
1992 16.0 51 7.1 9.8 11 3.5 3.8 4.3 4 3.3 4.5 6.5
1997 9.9 50 6.9 6.0 12 5.3 6.0 6.6 1 3.3 3.3 3.3
1999 6 4.4 4.6 4.8 1
2000 11.6 55 7.9 12 5.1 5.7 6.4 5 2.9 3.3 3.7
2001 10.0 8.9 4.2 5.6 6.8 7 2.1 3.4 6.0
2002 14 13.0 67 8.3 12 7.8 4.7 5.5 7.0 6 2.6 6.1 9.6
2003 9 11.0 66 5.0 13 6.2 6.2 6.2 1 3.2 3.2 3.2
2004 26 11.0 67 7.0 9.0 12 5.4 5.5 5.5 1 4.1 4.1 4.1
2006 5.0 6.3 6.8 4
2007 4.9 5.7 7.4 3
2008 4.4 5.2 5.9 4
2009 8 4.9 5.6 6.3 4
2010 5 6.6 6.6 6.7 2
2011 5.4 5.6 6.1 4
2012 5.0 5.2 5.4 4
2013 5.5 5.8 6.0 3
2014 6.0 6.4 6.8 2
2015 7.0 7.0 7.1 2
2016 7.0 7.0 7.0 1
2017 6.5 6.5 6.5 1

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
16 12 59 7 8 6.3 12 8.3 3.5 5.8 7.4 3 2.1 4 9.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-08-20
2013-09-12
2014-08-25
2014-09-23
2015-08-11
2015-09-16
2016-08-25
2017-08-24
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.9 9.5 21.6 9.9 24.4 10.7 18.0 7.9 24.7 8.0 23.5 8.2 25.3 8.0 24.6 7.5
1 25.9 9.3 21.4 9.9 23.5 11.3 18.0 7.9 24.7 8.0 23.4 8.1 25.3 7.9 24.6 7.5
2 25.7 9.3 21.4 9.9 22.8 11.4 18.0 7.9 24.6 8.0 22.3 8.2 25.2 7.8 24.5 7.4
3 25.6 9.0 21.4 9.7 22.4 11.3 18.0 7.8 24.4 7.4 22.2 8.2 25.0 7.8 24.4 7.1
4 25.4 8.0 21.0 9.8 21.9 11.0 18.0 7.8 23.8 7.2 22.1 8.0 24.5 7.7 23.3 7.1
5 24.1 7.9 21.1 8.3 21.5 9.9 18.0 7.8 18.5 6.9 21.9 8.0 24.2 7.5 22.6 4.6
6 21.1 7.9 19.9 7.0 17.5 3.3 18.0 7.8 12.0 2.3 20.4 5.8 23.8 6.5 19.2 2.5
7 15.9 7.7 18.5 5.5 12.6 1.0 16.7 5.1 9.4 1.9 13.4 1.4 11.7 2.9 10.9 0.5
8 11.9 3.0 14.4 1.9 10.5 0.9 11.6 1.1 7.8 1.5 10.4 0.1 9.8 1.9 9.1 0.2
9 9.9 1.2 10.3 0.5 9.2 0.9 9.8 0.9 7.8 0.5 9.0 0.0 9.7 0.9 7.5 0.2
10 9.4 0.5 7.9 0.5 8.7 0.8 9.0 0.9 7.7 0.5 8.4 0.0 7.8 0.1
11 7.7 0.1 7.3 0.5 8.5 0.8 8.7 0.2 7.4 0.6 8.4 0.0 7.8 0.1
12 7.7 0.1 7.7 0.5 8.7 0.4 8.6 0.0 7.4 0.5
13 7.7 0.1 7.7 0.2 8.8 0.4 8.6 0.0 7.4 0.5
14 7.7 0.1 8.8 0.1
15 7.7 0.1 8.8 0.1
16 8.8 0.1

Recent temperature and dissolved oxygen profile plots

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