Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
SOUTH BERWICK YORK 1 1 12.64 flushes/yr 110 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
5 m
(16 ft) 		3 m
(10 ft) 		3 ha
(7 ac) 		92,627 m3
(75 ac-ft) 		2 km2
(0.9 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
1991 15.0 39 6.2 23 2.0 2.2 2.9 6 9.2 9.2 9.2
1992 2.0 2.3 2.6 4
1993 2.5 2.5 2.7 2
1994 4.5 12 14 2.3 2.5 2.8 6 6.2 6.2 6.2
1995 24 2.2 2.6 3.0 6
1996 45.0 50 15 11 22 2.2 2.5 2.9 6 4.2 5.8 7.5
1997 2.1 2.5 3.1 6
1998 1.4 2.2 2.9 7
1999 2.2 2.6 3.1 6
2000 2.4 2.8 3.0 6
2001 2.1 2.5 3.0 6
2002 82 9.5 99 17 16 2.0 2.6 3.0 5 8.0 8.0 8.0
2003 2.1 2.7 3.2 5
2004 1.7 2.5 3.2 5
2005 2.1 2.5 3.0 3
2006 1.8 2.1 3.0 5
2007 71 6.6 91 6.7 36 1.6 2.0 2.8 5
2008 1.9 2.4 2.8 4
2009 2.2 2.5 2.8 5
2010 2.2 2.9 3.8 7
2011 2.3 2.8 3.4 5
2012 55 9.1 100 6.9 14 2.4 2.8 3.6 6
2013 2.1 2.4 3.2 7
2014 2.9 3.1 3.6 7
2015 2.5 3.2 3.5 7
2016 2.8 3.1 3.6 5
2017 2.4 2.8 3.2 6
2018 92 10.5 137 6.4 17 59 1.9 2.6 3.1 6 4.0 4.0 4.0

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
75 14 86 6.5 18 20 28 1.4 2.6 3.8 5.5 4 6.6 9.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1991-08-28
1994-08-08
1995-08-16
1996-08-01
1996-08-23
2002-08-27
2018-08-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 7.8 27 7.1 27 6.8 26 7.2 25 7.8 23 4.5 28 5.9
1 22 6.1 25 6.9 26 6.8 24 6.6 25 7.9 22 2.6 24 2.2
2 20 1.9 24 6.3 25 4.4 21 3.2 22 0.7 20 0.1 21 0.7
3 17 0.2 20 0.2 20 0.2 16 0.5 15 0.2 15 0.1 18 0.5
4 13 0.1 14 0.1 12 0.2 12 0.1 12 0.1 11 0.5

Most recent temperature and dissolved oxygen profile plots

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