Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
ACTON YORK 2 1 0.47 flushes/yr 522 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		6 m
(21 ft) 		340 ha
(840 ac) 		22,169,177 m3
(17,973 ac-ft) 		15 km2
(5.9 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
1980 8.2 8.2 8.2 1
1985 5.5 5.5 5.5 1
1988
1989 4.1 4.9 5.3 2
1990 5.3 7.6 8.8 3
1991 21.0 35 7.2 6.0 5.6 5.6 5.6 1
1994 5.1 6.2 7.2 5
1995 4.8 6.5 7.5 4
1997 14.0 50 6.8 8.0 4.6 5.9 7.5 5
1998 15.0 20 6.8 5.0 5.9 7.0 6
1999 15.0 7.1 9.1 5.3 6.2 7.4 5
2000 15.0 22 6.9 11.0 5.7 5.8 5.9 3
2001 15.0 34 6.8 8.8 4.8 6.0 7.9 5
2002 18.3 39 7.0 10.0 5.6 6.2 6.8 3
2003 18.3 42 6.8 4.6 7.0 7.8 3
2004 6 9.5 52 7.0 9.2 7.5 7.5 7.5 1 3.8 3.8 3.8
2005 5 7.6 53 7.2 5.0 7 6.5 7.4 8.1 7 2.8 2.8 2.8
2006 5.1 6.2 7.1 5
2007 6 7.5 47 7.2 9.0 12 6.6 7.6 8.3 6 2.0 2.0 2.0
2008 6.4 7.3 7.9 5
2009 6.0 7.0 8.6 6
2010 5.7 7.1 7.8 4
2011 5.6 6.7 7.6 5
2012 5.3 6.6 7.8 7
2013 7 7.8 54 7.2 5.0 10 6.4 6.8 7.2 5 2.2 2.2 2.2
2014 6.6 7.6 8.9 5
2015 5.0 7 6.9 8.2 9.4 6 3.7 3.7 3.7
2016 6.6 7.8 8.7 6
2017 5.5 7.0 8.2 7
2018 6.2 7.8 9.2 5

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
6 14 41 7 7.8 9 4.1 6.8 9.4 4.4 2 2.9 3.8

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-01
2015-08-22
2015-09-06
2016-08-14
2016-08-28
2017-08-25
2018-08-12
2018-08-26
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 8.1 26 7.6 25 7.8 25 7.8 25 7.7 23 8.0 25.8 7.7 24.2 7.9
1 24 8.1 26 7.6 25 7.9 25 7.8 25 7.7 23 8.0 25.9 7.3 24.2 7.9
2 23 8.1 26 7.6 25 7.8 25 7.9 25 7.8 23 8.0 25.9 7.3 24.0 7.9
3 23 8.2 26 7.6 24 7.8 25 7.8 25 7.7 23 8.0 25.9 7.2 23.8 7.9
4 23 8.1 26 7.7 24 7.8 25 7.8 25 7.7 23 8.0 25.9 7.2 23.7 7.9
5 23 8.1 26 7.7 24 7.8 25 7.7 24 7.6 23 8.0 25.9 7.2 23.6 7.9
6 23 8.1 26 7.7 24 7.8 25 7.6 24 7.5 23 7.9 25.9 7.2 23.6 7.9
7 22 8.0 23 7.9 24 7.8 24 7.5 24 7.1 23 8.0 19.9 9.5 22.3 8.3
8 21 7.4 19 8.8 20 8.9 21 7.8 24 7.2 16 7.5 15.7 9.7 17.1 9.3
9 16 6.8 15 8.3 15 6.7 18 5.7 18 4.3 14 4.4 12.7 7.7 13.3 7.6
10 13 3.4 13 4.3 13 2.8 16 2.2 16 1.1 13 1.5 11.4 5.2 11.8 4.6
11 12 0.5 11 1.8 12 0.2 15 0.2 15 0.3 12 1.0 10.3 1.5 10.7 1.4
12 11 0.1 10 0.0 10 0.1 13 0.1 14 0.1 11 0.2 9.5 0.3 9.8 0.4

Most recent temperature and dissolved oxygen profile plots

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