Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
CHELSEA KENNEBEC 13 1 9.11 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
NA m
(NA ft) 		NA m
(NA ft) 		38 ha
(93 ac) 		2,790,000 m3
(2,262 ac-ft) 		22 km2
(8.7 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
1989 1.6 2.5 3.5 5
1990 1.9 2.5 3.2 7
1991 1.7 2.7 3.5 9
1992 2.4 3.0 3.7 8
1993 1.8 2.4 3.1 7
1994 2.0 2.8 3.5 7
1995 2.0 2.7 3.9 7 1
1996 2.3 2.7 3.5 5
1997 2.1 3.1 4.0 8 1
1998 8.0 38 19 1.8 2.8 4.1 10 2 12.0 12.0 12.0
1999 2.3 3.1 3.9 7 1
2001 7.0 50 6.9 20 2.1 2.9 3.7 6 4.2 4.2 4.2
2002 39 9.8 44 10 1.8 2.8 3.9 8 5.9 6.2 6.6
2003 2.1 3.0 4.2 6 1
2004 1.9 2.8 3.3 5
2005 2.6 3.3 4.2 6 3
2006 58 7.2 45 6.8 16 2.0 2.7 3.4 7
2007 2.3 3.0 4.0 6 1
2008 2.8 3.2 3.7 5
2009 2.1 2.8 4.0 6 1
2010 2.3 3.0 3.5 5
2011 43 7.2 43 6.9 14 2.2 2.8 3.4 5
2012 2.2 2.5 3.2 4
2013 2.5 2.7 2.8 3
2014 2.1 2.6 3.2 6
2015 2.4 3.4 4.2 7 1
2016 24 8.0 54 6.9 16 2.3 3.2 4.1 6 6 8.3 8.3 8.4
2017 2.7 3.3 4.0 6 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
41 7.9 46 6.9 16 15 1.6 2.9 4.2 6.3 4.2 7.7 12

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1998-08-20
2001-08-30
2002-08-29
2016-08-30
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 25 7.4 24 8.0 22 7.0 25 8.1
1 22 7.5 22 7.7 22 6.8 24 8.0
2 22 6.3 21 7.5 22 6.5 24 7.9
3 21 6.6 21 7.4 22 6.4 23 7.4
4 21 3.3 23 7.3

Recent temperature and dissolved oxygen profile plots

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