Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ACTON YORK 2 1 0.47 flushes/yr
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.

## [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
1988
1989 4.1 5.0 5.5 2
1990 5.3 7.0 7.5 3
1991 22 36 7.1 7 5.8 5.8 5.8 1
2005 6.8 7.5 8.3 7
2006 5.2 6.1 7.0 5
2007 7.0 7.5 8.2 6
2008 6.4 7.2 8.1 6
2009 6.1 7.3 9.5 6
2010 4.9 6.9 7.8 4
2011 5.6 6.8 7.6 6
2014 6.4 7.6 8.9 5
2015 6.8 8.2 9.1 5
2016 6.3 7.7 8.6 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
22 36 7.1 7 4.1 7 9.5 4.7 Inf 1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1988-09-17
1989-08-06
1989-08-19
1989-09-05
1989-09-30
1990-08-14
1990-09-04
1991-09-04
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19 9.1 26 8.1 26 8.2 21 8.8 16 9.6 24 8.5
1 26 8.1 26 8.2 21 8.8 16 9.6 25 8.2 24 8.5 22 8.7
2 26 8.1 25 8.2 21 8.8 16 9.6 24 8.2 23 8.4 22 8.7
3 19 9.0 26 8.2 24 8.3 21 8.8 16 9.6 24 8.2 23 8.5 22 8.7
4 25 8.1 24 8.3 20 9.0 16 9.6 24 8.2 23 8.5 22 8.6
5 19 9.0 24 8.4 24 8.6 20 9.0 16 9.6 24 8.2 23 8.4 22 8.6
6 22 8.8 22 8.7 20 9.0 16 9.6 24 8.2 22 8.5 22 8.6
7 19 8.8 17 8.0 18 7.5 20 8.8 16 9.6 24 8.2 22 8.4 22 8.5
8 19 8.8 14 6.2 15 5.8 20 8.1 16 9.6 21 8.2 19 6.9 22 8.1
9 19 8.9 12 2.9 14 2.4 15 2.4 16 9.6 18 6.7 15 4.3 18 2.4
10 16 3.2 12 1.6 12 0.8 12 0.5 16 9.6 15 4.2 13 1.8 16 0.4
11 13 0.1 11 0.6 11 0.2 10 0.2 16 9.6 12 1.5 12 0.8
12 11 0.1 16 9.6 12 0.4
13 16 9.6 10 0.4

Recent temperature and dissolved oxygen profile plots

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