Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ACTON YORK 2 1 1.26 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
30 m
(98 ft) 		7 m
(22 ft) 		260 ha
(642 ac) 		20,679,595 m3
(16,765 ac-ft) 		21 km2
(8.3 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 5.0 5.7 6.4 4
1977 5.6 6.8 7.5 4
1978 7.0 7.4 7.6 3
1979 7.0 7.3 7.8 4
1980 6.1 7.1 7.9 5
1981 6.4 7.2 7.9 5
1982 4.7 5.9 7.6 6
1983 6.1 7.2 9.1 5
1984 4.8 6.4 7.6 4
1992 15 51 7.1 8.5 13 4.1 5.1 5.5 4 2.2 3.4 4.8
2006 5.0 6.2 7.4 6
2007 5.3 6.3 6.9 4
2008 5.9 6.5 7.0 4
2009 6.0 6.6 7.0 5
2010 6.5 6.8 7.2 3
2011 5.5 6.6 7.2 3
2012 5.1 5.7 6.6 4
2013 7.2 7.3 7.4 2
2014 6.4 6.6 6.9 2
2015 7.0 7.8 8.6 2
2016 6.2 7.1 8.0 2
2017 5.1 5.7 6.4 2

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
15 51 7.1 8.5 13 4.1 6.6 9.1 3.8 2.2 3.4 4.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-09-12
2014-08-25
2014-09-23
2015-08-19
2015-09-25
2016-09-21
2017-08-24
2017-09-14
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21.5 9.6 25.0 11.2 18.6 8.3 27.7 8.0 20.8 9.3 22.7 8.9 24.8 8.6 22.6 8.5
1 21.5 9.6 23.3 11.2 18.6 8.3 27.5 8.0 20.8 9.3 22.7 9.0 24.8 8.7 21.3 8.6
2 21.5 9.6 22.6 11.2 18.6 8.3 26.8 8.1 20.7 9.3 22.3 9.4 24.6 8.7 21.0 8.7
3 21.2 9.6 21.9 11.3 18.1 8.3 26.3 8.1 20.7 9.3 22.0 9.5 24.0 8.7 20.3 8.7
4 20.7 9.4 19.8 11.4 18.1 8.3 23.1 9.5 20.6 9.3 21.4 9.2 22.1 8.7 19.5 8.6
5 16.9 9.1 19.0 12.1 17.9 8.0 19.5 11.3 19.5 9.5 20.6 7.5 18.2 7.1 17.9 5.5
6 12.4 9.0 15.9 12.2 16.8 8.1 14.4 11.4 14.7 11.9 17.5 7.7 13.2 6.3 14.4 4.7
7 9.7 9.9 9.2 11.9 11.8 8.1 9.0 9.9 11.2 5.2 13.5 6.6 9.2 3.3 10.4 3.0
8 9.0 9.9 8.7 10.3 9.2 2.0 8.4 0.9 9.3 1.5 11.6 6.8 7.9 1.5 8.2 2.9
9 8.1 2.0 8.3 8.3 8.1 1.1 6.8 0.1 7.7 0.9 10.4 0.9 6.7 1.0 7.1 2.9
10 7.3 0.5 7.0 8.0 7.2 1.0 6.9 0.1 7.1 0.2 10.3 0.6 6.2 1.3 6.5 2.0
11 7.1 0.2 6.7 0.8 7.1 0.9 10.3 0.6 6.3 0.2 6.8 1.9
12 7.2 0.2 6.9 0.4 7.4 0.9 9.4 0.4 6.5 0.2 6.6 1.7
13 7.2 0.1 7.7 0.3 7.4 0.1 8.5 0.4 6.6 0.2 6.8 0.9
14 7.2 0.1 7.0 0.3 7.5 0.1 8.6 0.3 6.4 0.2 6.8 0.6
15 7.2 0.1 7.0 0.1 7.5 0.1 8.6 0.3 6.5 0.1 6.8 0.2
16 7.0 0.1 6.5 0.1
17 6.5 0.1

Recent temperature and dissolved oxygen profile plots

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