Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
SANFORD YORK 2 2 55.72 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
9 m
(30 ft) 		3 m
(9 ft) 		67 ha
(165 ac) 		2,503,694 m3
(2,030 ac-ft) 		23 km2
(8.8 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
1977 14 1.1 1.1 1.1 1 41.6 41.6 41.6
1978 17 100 0.4 1.2 1.8 7 6.2 42.0 90.1
1979 12 86 0.4 1.3 3.0 9 0.2 30.1 69.9
1980 14 107 0.3 1.1 2.1 8 17.0 17.0 17.0
1982 15 71 1.5 2.3 2.6 7 4.6 11.1 20.6
1983 11 50 1.8 2.4 3.3 6 4.1 15.2 28.4
1984 14 52 1.3 2.1 3.3 6 3.0 16.6 39.3
1985 15 78 1.8 2.5 3.0 5 8.2 19.8 28.8
1990 13 84 7.0 23 2.0 2.7 3.1 4 7.7 11.3 18.9
1991 12 67 6.8 33 1.7 2.3 2.7 4 1.9 7.2 11.5
1992 2.0 2.5 3.6 4
1994 1.3 1.7 2.0 3
1995 1.9 2.5 3.2 5
1996 2.0 2.2 2.7 5
1997 16 112 7.1 17 2.1 2.9 3.7 6 9.5 9.5 9.5
1998 15 113 26 28 1.3 2.0 2.8 6 15.0 15.0 15.0
1999 2.3 3.1 3.9 5
2000 2.8 3.3 3.6 5
2001 2.0 2.7 3.4 4
2002 30 18 128 14 12 2.3 2.9 3.4 5 8.7 9.0 9.3
2003 3.2 3.4 3.6 4
2004 47 17 114 7.2 19 40 2.7 2.7 2.8 1 15.0 15.0 15.0
2005 37 16 144 7.2 18 20 37 2.1 3.3 3.9 5 12.0 12.0 12.0
2006 52 13 129 7.1 20 20 2.8 3.4 4.4 6 4.5 4.5 4.5
2007 20 2.6 3.5 5.4 5
2008 18 2.4 3.4 4.0 3
2009 20 2.1 3.2 4.1 6
2010 16 2.6 3.1 3.6 5
2011 26 16 128 7.3 16 2.8 3.2 4.1 7
2012 14 3.0 3.6 4.3 7
2013 15 2.8 3.3 4.1 7
2014 15 3.1 3.5 4.0 8
2015 15 3.2 3.9 4.7 7
2016 26 16 151 7.1 15 14 21 3.3 4.1 4.6 9 5.0 5.0 5.0
2017 29 18 176 7.1 15 14 3.0 3.7 4.5 7 4.4 4.4 4.4

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
35 15 105 7.1 19 17 28 0.3 2.7 5.4 5.5 0.2 16 90

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2006-08-24
2016-08-25
2017-08-14
2017-08-25
2017-09-02
2017-09-12
2017-09-15
2017-09-28
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 7.6 25 8.2 25 7.5 24 7.7 21 6.9 22 8.6 23 8.5 24 8.6
1 23 7.5 25 8.1 24 7.6 24 7.6 20 6.9 22 8.6 23 8.5 24 8.6
2 23 7.4 25 7.8 24 7.5 24 7.5 20 6.8 22 8.6 20 7.8 24 8.6
3 22 6.0 24 7.4 24 7.4 24 7.4 20 6.8 21 8.7 20 6.7 21 8.6
4 22 5.5 24 6.3 23 3.2 22 3.2 20 6.8 20 8.2 19 5.9 20 6.6
5 22 5.1 24 5.1 22 1.5 22 1.9 20 6.8 19 7.8 19 4.9 20 4.1
6 22 4.9 22 0.6 22 0.2 21 1.4 20 6.8 19 5.8 19 4.7 19 2.3
7 21 4.6 21 0.5 21 0.0 21 1.3 20 6.7 19 5.2 19 4.9 19 1.5
8 21 4.1 20 0.4 21 0.0 21 0.8 20 6.7 19 4.9 19 4.2 19 0.8
9 19 4.3

Recent temperature and dissolved oxygen profile plots

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