Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
SWANVILLE WALDO 22 1 1.15 flushes/yr 284 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(25 ft) 		3 m
(11 ft) 		62 ha
(153 ac) 		2,079,188 m3
(1,686 ac-ft) 		4 km2
(1.4 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
2000 5.2 6.0 6.4 7
2001 5.0 25 6.9 6 7 5.9 6.6 7.5 8 3.2 3.2 3.2
2002 5.2 5.9 6.8 7
2003 5.2 6.3 7.4 8
2004 5.0 5.8 6.5 7
2005 5.2 5.8 6.5 9
2006 15 4.5 21 6.8 8 5.0 5.6 6.8 8 3.9 3.9 3.9
2007 5.2 5.8 6.5 8
2008 4.3 5.2 6.2 8
2009 4.8 5.5 6.6 8
2010 4.3 6.0 7.2 8
2011 12 4.1 20 6.8 8 6 9 4.2 5.0 6.0 8 3.7 3.7 3.7
2012 4.4 5.2 6.6 9
2013 4.2 5.2 6.9 8
2014 4.5 5.6 6.3 9
2016 5.0 5.7 6.2 4
2017 5.7 6.2 6.4 7
2018 12 6.0 25 6.8 16 4.7 5.5 6.3 7 3.0 3.0 3.0

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
13 4.9 23 6.8 9.6 6 8 4.2 5.7 7.5 7.7 3 3.5 3.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2001-08-27
2006-08-21
2011-08-15
2018-09-05
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.1 22 8.6 26 7.6 25 8.3
1 22 8.0 22 8.4 24 7.5 25 8.3
2 22 8.0 22 8.4 24 7.6 25 8.3
3 22 8.0 22 8.3 24 7.5 24 8.1
4 22 7.9 22 8.3 23 6.8 24 7.9
5 22 7.9 20 5.0 21 3.2 23 5.6
6 22 7.5 16 0.4 15 0.5 17 0.8
7 16 1.5 13 0.2 13 0.3
8 11 0.2

Most recent temperature and dissolved oxygen profile plots

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