Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PARSONSFIELD YORK 4 1 0.4 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
10 m
(33 ft) 		6 m
(19 ft) 		105 ha
(259 ac) 		6,209,592 m3
(5,034 ac-ft) 		3 km2
(1.3 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
1983 9.0 10 4.30 6.7 8.8 6 5.6 5.6 5.6
1984 5.50 6.4 7.3 6
1985 3.70 6.8 8.8 6
1986 9.0 26 7 4.60 6.2 7.6 6
1987 3.00 6.0 7.6 6
1988 4.10 6.6 7.9 5
1989 6.10 7.3 8.1 4
1990 6.70 7.3 8.8 5
1991 19.0 32 7.3 11 4.10 6.8 8.2 5
1992 6.50 7.1 7.9 5
1993 5.50 7.0 8.0 4
1994 4.50 6.0 6.5 4
1995 5.20 6.2 7.6 2
1996 5.80 6.3 7.0 3
1997 2.90 6.9 9.3 6
1998 6.20 7.2 7.8 3
1999 8.1 41 8 12 6.05 7.0 8.6 4 2.4 2.4 2.4
2000 6.80 7.4 8.1 3
2001 7.1 7 17 6.40 7.3 8.2 3 2.8 2.8 2.8
2002 7.40 7.8 8.0 3
2003 6.41 7.1 7.7 4
2004 5 10.3 43 7.2 7 26 5.20 7.6 8.4 4 2.8 2.8 2.8
2005 6.20 6.7 7.1 3
2006 5.40 6.4 7.3 3
2007 5 7.3 39 7.3 8 32 6.45 7.2 8.0 2 2.5 2.5 2.5
2009 5.70 6.8 7.6 3
2010 3.70 6.0 7.3 3
2011 3.60 4.6 5.6 3
2012 4 7.5 35 7.3 6 6.35 6.5 6.7 3
2013 4 7.6 34 7.1 7 6.81 7.2 8.1 3 2.1 2.1 2.1
2014 6.80 7.6 8.6 3
2015 6.62 7.4 8.1 5
2016 6.05 7.6 8.2 2
2017 3 10.0 26 7.6 25 56 0.81 2.8 4.9 5 15.0 23.8 30.0

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
4.2 9.8 34 7.3 10 6 29 0.8 6.7 9.3 4 2.1 6 30

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1991-09-04
1999-08-25
2001-08-27
2004-08-16
2007-08-16
2013-08-14
2017-09-05
2017-09-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 9.0 24 9.0 24 9.1 24 8.3 24 9.2 23 8.8 21 9.5 24 11.8
1 22 8.8 24 9.1 24 9.1 24 8.3 24 9.2 23 8.7 20 9.5 24 11.9
2 22 8.9 23 9.1 24 9.1 24 8.4 24 9.3 23 8.7 20 9.5 21 11.2
3 22 8.9 23 9.1 24 9.2 24 8.3 24 9.3 23 8.7 20 9.3 20 8.9
4 22 8.8 23 9.1 24 9.2 24 8.3 24 9.2 23 8.7 20 9.1 20 7.1
5 22 8.8 23 9.1 24 9.1 24 8.3 24 9.2 23 8.7 20 8.9 19 5.2
6 22 8.8 23 9.1 24 9.1 23 8.3 22 12.0 23 8.5 19 7.8 18 3.5
7 22 8.6 22 8.3 20 11.9 22 10.2 18 11.7 22 8.5 16 2.1 16 0.6
8 21 5.1 19 4.3 16 6.3 18 10.6 14 7.2 23 8.6 13 0.7 14 0.6
9 18 0.4 17 0.8 14 0.6 16 2.0 12 1.3 12 0.6 12 0.5
10 17 0.2 15 0.6 12 0.5 11 0.5

Recent temperature and dissolved oxygen profile plots

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