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 5.3 5.7 6.1 4
1977 6.2 7.1 8.4 4
1978 6.9 7.7 8.5 3
1979 6.7 7.6 8.1 4
1980 6.4 7.8 9.4 5
1981 6.4 7.4 8.8 5
1992 14 50 7.2 7.2 15 4.6 5.0 5.3 3 3.2 3.2 3.2
2006 5.0 6.1 6.8 4
2007 5.2 6.4 7.0 4
2008 5.0 5.5 6.4 3
2009 5.9 6.2 6.8 3
2010 6.7 6.9 7.1 3
2011 6.0 6.5 7.2 3
2012 5.7 6.1 6.6 3
2013 6.5 6.8 7.0 2
2014 7.1 7.1 7.1 2
2015 11 10 72 7.1 3.0 6.8 8.6 9.9 2
2016 7.8 7.8 7.8 2
2017 6.4 6.6 6.9 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
11 12 61 7.1 5.1 15 4.6 6.8 9.9 3.2 3.2 3.2 3.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-23
2015-08-19
2015-08-25
2015-09-25
2016-08-25
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 18.5 8.1 27.8 8.6 25.7 8.0 21.2 9.3 25.5 8.5 22.3 8.9 24.3 8.1 26.2 8.5
1 18.5 8.1 26.2 8.3 25.6 8.0 21.2 9.3 25.1 8.3 22.0 8.7 24.3 8.1 26.1 8.1
2 18.5 8.1 26.3 8.2 25.6 8.0 21.1 9.3 24.8 8.3 21.6 8.6 23.9 8.1 25.7 8.2
3 18.3 8.0 25.6 8.4 25.6 7.9 21.0 9.3 24.7 8.4 21.5 8.4 23.8 8.2 21.9 8.2
4 18.2 8.0 24.3 8.6 25.3 7.7 21.0 9.2 24.5 8.4 21.5 8.2 23.4 8.1 21.6 8.5
5 18.2 8.0 22.8 9.2 23.0 5.9 20.9 9.2 24.4 8.3 21.4 8.3 22.8 8.0 21.3 8.4
6 18.2 7.8 17.6 10.1 17.0 4.4 20.8 9.0 23.9 8.1 21.3 8.3 16.7 6.1 20.6 8.4
7 17.9 4.8 12.9 8.5 13.1 2.3 14.2 6.8 17.8 6.9 20.7 8.9 12.8 4.9 19.2 8.3
8 12.9 4.7 10.2 7.5 10.3 0.8 10.8 4.5 14.6 6.9 15.8 5.7 11.2 4.4 18.5 8.3
9 10.5 4.3 8.6 6.5 9.2 0.5 9.1 4.9 12.0 5.0 12.9 5.2 8.8 4.4 17.9 8.3
10 9.2 4.5 7.8 6.4 8.1 4.5 10.1 4.9 10.3 4.9 8.2 4.4 16.8 8.5
11 8.3 4.5 7.2 5.6 7.3 4.7 9.7 4.9 9.1 4.0 7.2 4.7 15.4 8.6
12 7.9 4.5 7.0 5.1 6.9 4.7 8.7 4.9 8.2 3.9 6.7 4.7 14.5 8.1
13 7.9 4.4 6.6 5.0 6.6 3.9 7.7 4.8 7.5 3.7 6.4 4.6 13.7 7.9
14 7.1 3.5 6.4 4.6 6.4 2.5 7.3 4.7 7.1 3.0 6.2 4.3 12.5 7.9
15 6.9 2.5 6.3 3.0 6.3 2.1 7.1 3.9 7.0 2.9 6.1 4.1 11.7 7.9
16 6.7 1.3 6.3 0.8 6.2 1.9 6.9 2.9 6.9 2.9 6.0 3.9 10.9 7.8
17 6.6 1.4 6.2 0.8 6.2 1.5 6.8 1.9 6.8 2.1 5.9 2.7 10.0 7.7
18 6.6 1.4 6.2 0.2 6.2 0.3 6.7 0.6 6.9 1.9 5.8 1.1 9.4 7.1
19 6.5 1.3 6.2 0.1 6.3 0.2 6.7 0.4 6.7 1.8 5.9 1.4 8.8 6.9
20 6.5 1.3 6.2 0.1 6.3 0.1 6.6 0.4 5.8 0.3 8.7 6.8
21 6.5 0.6 6.3 0.1 6.6 0.2 5.8 0.3 8.7 6.8
22 6.5 0.6 6.3 0.0 6.6 0.2 5.8 0.2 8.1 5.5
23 5.8 0.1 8.1 5.0
24 5.8 0.1 8.1 2.1
25 7.8 1.0
26 7.8 1.0

Recent temperature and dissolved oxygen profile plots

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