Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ACTON YORK 2 1 0.3 flushes/yr
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.

## [1] "No 2017 Secchi Disk Transparency Data"

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

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
4.7 8.6 49 7.2 6 8 6.8 6 9.6 13 4.1 0.7 1.7 3.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1976-09-20
1981-09-18
1985-09-18
1991-09-04
1999-08-23
2009-08-12
2010-08-18
2013-08-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19.1 9.0 19.8 9.2 19.0 8.9 21.3 8.6 23.8 8.3 24.4 8.1 24 8.6 22.2 8.8
1 19.1 9.0 21.3 8.6 23.2 8.3 24.1 8.2 24 8.7 22.2 8.8
2 19.1 8.9 19.8 9.1 18.7 8.9 21.3 8.6 23.0 8.4 23.9 8.3 24 8.7 22.2 8.8
3 19.0 8.9 21.2 8.5 22.8 8.4 23.7 8.3 24 8.8 22.2 8.7
4 19.0 8.8 19.8 9.2 18.5 9.0 21.2 8.7 22.6 8.4 23.6 8.3 24 8.7 22.2 8.7
5 19.0 8.8 21.2 8.6 22.5 8.4 23.4 8.3 24 8.7 22.2 8.7
6 19.0 8.8 19.8 9.2 18.5 9.0 21.2 8.6 22.4 8.4 22.7 8.3 24 8.8 22.2 8.7
7 18.9 8.7 21.2 8.7 22.4 8.3 20.7 8.4 24 8.8 22.1 8.7
8 18.4 8.6 19.8 9.3 18.1 8.9 21.2 8.6 22.3 8.3 17.5 8.5 22 9.1 22.1 8.8
9 17.9 8.4 21.2 8.6 17.2 9.8 15.8 8.7 17 9.9 15.4 11.0
10 17.3 8.3 18.0 7.7 18.0 8.9 21.2 8.6 15.1 8.5 13.5 9.0 15 9.4 12.8 10.6
11 16.0 8.0 17.8 8.8 20.5 8.4 13.4 8.4 11.1 9.1 14 8.8 11.6 11.1
12 13.1 7.1 13.2 6.0 15.2 9.5 15.0 8.2 12.7 8.2 10.3 9.2 13 8.2 10.4 11.2
13 11.9 6.2 12.5 8.1 12.4 7.9 12.0 7.2 9.6 8.8 12 8.0 9.7 10.4
14 11.0 5.7 11.0 5.2 11.1 7.1 11.0 7.5 11.5 6.9 9.3 8.5 12 6.9 9.1 9.2
15 10.6 5.4 10.3 7.1 11.1 6.8 9.0 8.4 12 6.7 8.8 9.2
16 10.2 5.3 10.0 4.6 10.5 5.5 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
18 10.0 4.6 9.5 4.5 10.0 4.6 10.5 6.4 11 6.3
19 9.1 5.6 10.3 5.9 8.2 7.9 7.7 8.1
20 9.8 4.5 9.2 4.0 10.0 5.7 11 5.8
21 8.9 5.3 10.0 5.7 8.1 7.9 7.5 7.7
22 9.5 4.0 8.8 3.8 9.5 4.1 10.0 5.6 7.4 7.3
23 9.0 5.3 10.0 5.4 8.1 7.8
24 9.4 3.9 8.8 3.7 10.0 5.2
25 8.9 5.2 9.9 4.9 8.0 7.7 10 5.5
26 9.2 3.8 8.6 3.4 9.0 3.4 9.9 4.7
27 9.9 4.4
28 9.2 3.8 8.6 3.1 9.9 4.4 10 4.9
29 9.2 3.6 9.0 2.9
30 7.9 7.1

Recent temperature and dissolved oxygen profile plots

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