Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LYMAN YORK 2 1 0.31 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(43 ft)
6 m
(21 ft)
80 ha
(198 ac)
5,035,084 m3
(4,082 ac-ft)
2 km2
(0.7 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
1980 5.0 5.4 6.0 3
1981 6.4 7.0 7.7 5
1982 5.0 43 5 8 5.5 6.6 8.5 6 2.7 2.7 2.7
1985 5.0 5.9 6.5 7
1986 7.0 31 6.7 6.7 6.7 1 4.4 4.4 4.4
1987 5.5 6.0 6.5 4
1989 7 5.5 6.0 7.0 7
1990 7 5.5 6.2 7.3 7
1992 7.0 7.5 8.5 6
1993 6.0 6.8 8.0 5
1994 6.0 6.5 7.0 4
1995 6.0 6.2 6.8 5
1997 6.5 6.8 7.0 7
1998 7.5 58 4 13 5.8 6.7 8.3 8 2.9 2.9 2.9
1999 7.0 52 5 8 6.1 6.9 7.5 7 2.2 2.2 2.2
2000 6.5 7.3 8.0 6
2001 5.0 59 7.1 5 11 6.5 7.1 8.1 7 1.3 1.3 1.3
2002 6.2 6.9 7.5 5
2003 6.5 7.0 7.5 7
2004 2 9.5 82 7.0 5 22 6.5 7.4 9.2 8 2.1 2.1 2.1
2005 3 6.2 88 7.0 9 6 6.0 7.3 8.1 7 2.4 2.4 2.4
2006 6.8 7.9 8.2 6
2007 6.4 7.2 8.0 5
2008 7.0 7.4 8.1 5
2009 4 6.4 7.3 8.1 5
2010 6 6.0 6.3 6.8 5
2011 6.0 6.3 6.8 5
2012 6.0 6.5 6.8 7
2016 5 9.0 83 7.2 5 22 6.0 6.6 8.6 8 2.4 2.4 2.4
2017 1 10.0 87 7.2 5 24 9.3 9.3 9.3 1 2.2 2.2 2.2

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
2.8 7.4 65 7.1 5.7 5 14 5 6.8 9.3 5.6 1.3 2.5 4.4

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1986-08-18
1998-08-21
1999-08-26
2001-08-20
2004-08-17
2005-08-16
2016-08-25
2017-09-06
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 8.2 24 8.1 24 8.6 25 8.1 25 8.6 26 7.8 26 8.4 22 8.9
1 23 8.2 24 8.2 24 8.6 25 8.1 24 8.6 26 7.8 26 8.4 22 8.8
2 23 8.2 24 8.1 24 8.6 25 7.8 24 8.7 26 7.8 26 8.5 21 8.8
3 23 8.2 24 8.2 24 8.6 25 7.8 24 8.6 26 7.9 25 8.5 21 8.8
4 23 8.2 24 8.2 24 8.5 25 7.8 24 8.7 25 7.8 25 8.4 21 8.8
5 23 8.1 24 8.2 23 8.5 25 7.8 23 8.7 25 7.8 25 8.3 21 8.8
6 23 7.8 24 8.1 23 8.5 24 8.1 23 8.7 22 10.2 25 8.3 21 8.7
7 20 8.2 20 7.9 23 8.4 23 9.6 23 8.7 17 9.9 24 8.4 20 8.7
8 18 7.8 17 5.9 22 8.4 18 11.6 18 10.3 15 7.9 20 9.1 20 8.9
9 14 4.2 15 1.4 18 6.6 15 9.0 16 8.2 14 5.4 16 5.3 15 7.0
10 12 0.4 14 0.2 15 0.7 13 6.2 13 4.2 13 3.2 14 2.2 13 4.1
11 11 0.2 12 0.1 14 0.2 12 1.0 12 0.9 12 1.9 13 0.6 12 0.9
12 12 0.1 11 0.6 11 0.6 12 0.5 13 0.5 11 0.7

Recent temperature and dissolved oxygen profile plots

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