Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
ACTON YORK 2 1 1.26 flushes/yr 481 ft
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
2018 6.1 6.5 7.0 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 3.1 3.2 3.2 3.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-09-12
2014-08-25
2015-08-19
2015-08-25
2016-08-25
2017-08-24
2017-09-14
2018-08-20
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21.7 9.4 25.1 11.3 27.8 8.6 25.7 8.0 25.5 8.5 24.3 8.1 26.2 8.5 25.2 8.3
1 21.5 9.3 24.0 11.5 26.2 8.3 25.6 8.0 25.1 8.3 24.3 8.1 26.1 8.1 25.1 8.2
2 21.4 9.3 23.4 11.5 26.3 8.2 25.6 8.0 24.8 8.3 23.9 8.1 25.7 8.2 25.1 8.1
3 21.3 9.2 22.8 11.5 25.6 8.4 25.6 7.9 24.7 8.4 23.8 8.2 21.9 8.2 25.1 8.1
4 21.3 9.2 22.4 11.4 24.3 8.6 25.3 7.7 24.5 8.4 23.4 8.1 21.6 8.5 24.8 8.0
5 21.3 9.0 22.0 11.3 22.8 9.2 23.0 5.9 24.4 8.3 22.8 8.0 21.3 8.4 22.0 10.1
6 21.2 8.8 20.8 10.5 17.6 10.1 17.0 4.4 23.9 8.1 16.7 6.1 20.6 8.4 15.9 10.1
7 20.8 6.5 15.4 10.5 12.9 8.5 13.1 2.3 17.8 6.9 12.8 4.9 19.2 8.3 11.3 7.9
8 18.2 5.9 11.8 8.2 10.2 7.5 10.3 0.8 14.6 6.9 11.2 4.4 18.5 8.3 9.0 6.9
9 14.0 5.9 9.7 7.8 8.6 6.5 9.2 0.5 12.0 5.0 8.8 4.4 17.9 8.3 7.7 5.9
10 10.3 5.6 8.8 7.3 7.8 6.4 10.1 4.9 8.2 4.4 16.8 8.5 7.0 4.6
11 9.1 5.5 8.3 7.2 7.2 5.6 9.7 4.9 7.2 4.7 15.4 8.6 6.6 4.7
12 8.6 5.2 7.6 7.0 7.0 5.1 8.7 4.9 6.7 4.7 14.5 8.1 6.2 5.0
13 7.1 5.2 7.1 7.2 6.6 5.0 7.7 4.8 6.4 4.6 13.7 7.9 5.9 5.3
14 6.2 5.1 6.9 5.9 6.4 4.6 7.3 4.7 6.2 4.3 12.5 7.9 5.7 5.1
15 5.9 3.0 6.7 3.6 6.3 3.0 7.1 3.9 6.1 4.1 11.7 7.9 5.6 4.0
16 5.8 1.9 6.7 2.2 6.3 0.8 6.9 2.9 6.0 3.9 10.9 7.8 5.6 3.9
17 5.6 1.1 6.6 0.9 6.2 0.8 6.8 1.9 5.9 2.7 10.0 7.7 5.6 2.9
18 5.6 1.2 6.5 0.9 6.2 0.2 6.7 0.6 5.8 1.1 9.4 7.1 5.6 1.5
19 5.2 0.9 6.5 0.8 6.2 0.1 6.7 0.4 5.9 1.4 8.8 6.9 5.6 0.9
20 5.1 0.5 6.5 0.6 6.2 0.1 5.8 0.3 8.7 6.8 5.6 0.9
21 5.1 0.4 6.5 0.6 5.8 0.3 8.7 6.8 5.6 0.1
22 5.2 0.1 6.6 0.6 5.8 0.2 8.1 5.5 5.6 0.0
23 5.1 0.1 5.8 0.1 8.1 5.0
24 5.1 0.1 5.8 0.1 8.1 2.1
25 7.8 1.0
26 7.8 1.0

Most recent temperature and dissolved oxygen profile plots

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