Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
ACTON YORK 2 1 0.3 flushes/yr 574 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
31 m
(102 ft) 		11 m
(36 ft) 		675 ha
(1,667 ac) 		74,000,000 m3
(59,993 ac-ft) 		33 km2
(13 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
1974 9.7 31 5 10.7 10.7 10.7 1 1.5 1.5 1.5
1975 7.0 34 9 7.7 9.3 10.9 2 1.3 1.3 1.3
1976 8.8 38 12 7.8 8.8 9.7 2 1.4 1.4 1.4
1978 10.0 10.0 10.0 4
1981 10.0 39 7 8.0 6.8 8.0 8.6 3 3.6 3.6 3.6
1983 7.0 7.8 8.5 4
1984 7.5 9.1 10.0 4
1985 7.0 40 3 6.5 9.0 10.1 11.0 4
1987 9.0 9.8 11.5 5
1988 8.5 9.6 10.5 4
1991 10.0 51 7.2 4 6.0 7.9 11.3 6
1998 6.2 6.6 8.2 3
1999 7.0 58 3 10.7 10.7 10.7 1 2.2 2.2 2.2
2004 11.0 11.2 11.4 2
2005 6 7.4 68 7.2 10 7.5 9.3 11.2 6
2006 7.7 8.6 9.6 5
2007 6.1 9.7 11.2 6
2009 7 9.3 10.4 12.4 6 8 1.3 1.3 1.3
2010 10 9.4 10.4 12.1 7 1.5 1.5 1.5
2011 10.1 11.5 13.3 5
2013 7 8.1 63 7.2 3 8.2 9.8 10.8 5 1.4 1.4 1.4
2014 8.9 9.7 10.5 5
2016 1 11.0 70 7.3 5 6.0 11.2 11.6 12.8 5 0.7 0.7 0.7
2018 4 9.0 76 7.3 8 11.4 11.4 11.4 1 2.0 2.0 2.0

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
4.5 8.6 52 7.2 6.2 8 6.8 6 9.7 13 4 0.7 1.7 3.6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1991-09-04
1999-08-23
2009-08-12
2010-08-18
2013-08-15
2018-09-05
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21.3 8.6 23.8 8.3 24.4 8.1 24 8.6 22.2 8.8 26.3 8.5
1 21.3 8.6 23.2 8.3 24.1 8.2 24 8.7 22.2 8.8 26.2 8.5
2 21.3 8.6 23.0 8.4 23.9 8.3 24 8.7 22.2 8.8 25.8 8.5
3 21.2 8.5 22.8 8.4 23.7 8.3 24 8.8 22.2 8.7 25.5 8.5
4 21.2 8.7 22.6 8.4 23.6 8.3 24 8.7 22.2 8.7 25.1 8.6
5 21.2 8.6 22.5 8.4 23.4 8.3 24 8.7 22.2 8.7 24.7 8.6
6 21.2 8.6 22.4 8.4 22.7 8.3 24 8.8 22.2 8.7 24.4 8.6
7 21.2 8.7 22.4 8.3 20.7 8.4 24 8.8 22.1 8.7 24.0 8.6
8 21.2 8.6 22.3 8.3 17.5 8.5 22 9.1 22.1 8.8 21.5 9.8
9 21.2 8.6 17.2 9.8 15.8 8.7 17 9.9 15.4 11.0 17.1 11.7
10 21.2 8.6 15.1 8.5 13.5 9.0 15 9.4 12.8 10.6 13.6 11.1
11 20.5 8.4 13.4 8.4 11.1 9.1 14 8.8 11.6 11.1 12.2 10.7
12 15.0 8.2 12.7 8.2 10.3 9.2 13 8.2 10.4 11.2 10.5 10.1
13 12.4 7.9 12.0 7.2 9.6 8.8 12 8.0 9.7 10.4 9.9 9.9
14 11.0 7.5 11.5 6.9 9.3 8.5 12 6.9 9.1 9.2 9.4 8.6
15 10.3 7.1 11.1 6.8 9.0 8.4 12 6.7 8.8 9.2 9.1 8.0
16 11.0 6.7 8.2 8.6
17 9.9 6.4 10.9 6.6 8.5 7.9 8.0 8.4 8.5 7.3
18 10.5 6.4 11 6.3
19 9.1 5.6 10.3 5.9 8.2 7.9 7.7 8.1 8.1 6.8
20 10.0 5.7 11 5.8
21 8.9 5.3 10.0 5.7 8.1 7.9 7.5 7.7 8.0 6.4
22 10.0 5.6 7.4 7.3
23 9.0 5.3 10.0 5.4 8.1 7.8 7.7 5.9
24 10.0 5.2
25 8.9 5.2 9.9 4.9 8.0 7.7 10 5.5 7.7 5.5
26 9.9 4.7
27 9.9 4.4
28 9.9 4.4 10 4.9
29 7.6 5.3
30 7.9 7.1 7.5 4.5

Most recent temperature and dissolved oxygen profile plots

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