Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ACTON YORK 2 1 1.7 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
3 m
(10 ft) 		2 m
(6 ft) 		35 ha
(86 ac) 		661,972 m3
(537 ac-ft) 		2 km2
(0.6 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
1979 1.4 1.4 1.4
1997 12 61 7.2 12 2.7 2.7 2.7 1 1
2002 2.7 2.9 3.2 6 8
2005 16.0 10 86 7.3 12 3.0 3.0 3.0 1 1 4.8 4.8 4.8
2006 3.0 3.1 3.2 3 5
2009 13 3.1 3.1 3.1 1 1 2.5 2.5 2.5
2015 7 2.8 2.9 3.0 5 8
2016 10 2.7 2.9 3.1 3 6
2017 9.5 13 139 7.2 12 3.1 3.1 3.1 1 1 2.7 2.7 2.7

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
13 12 95 7.2 12 8.5 2.7 3 3.2 2.6 1.4 2.8 4.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1997-08-27
2005-08-17
2009-08-18
2017-09-11
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 23 7.7 26 7.2 27 7.9 20 8.9
1 23 7.5 26 7.2 27 7.9 20 8.9
2 22 7.9 25 7.3 27 8.0 20 8.9
3 25 7.4 24 4.7 20 8.7

Recent temperature and dissolved oxygen profile plots

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