Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
HUDSON PENOBSCOT 32 1 3.09 flushes/yr 144 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(18 ft)
3 m
(10 ft)
165 ha
(408 ac)
5,022,461 m3
(4,072 ac-ft)
31 km2
(12 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
2003 3.4 3.8 4.5 2
2004 3.4 4.1 5.1 4 1
2005 34 34 88 7.8 12 2.8 3.5 4.5 5
2006 3.4 4.2 4.9 5 3
2007 3.4 4.4 4.8 7 2
2008 3.8 4.1 5.2 6
2009 19 3.1 4.2 5.3 8 1 7.5 7.5 7.5
2010 3.8 4.5 4.9 6 1
2011 15 3.0 3.5 4.8 6 7.0 7.0 7.0
2012 2.9 3.6 4.7 2
2013 3.4 4.1 4.8 7
2014 3.5 4.2 4.8 8
2015 21 38 93 7.9 12 4.5 4.5 4.5 1 1 6.2 6.2 6.2
2017 31 2.3 3.3 4.0 5
2018 16 3.0 3.1 4.4 2 3

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
28 36 90 7.9 15 20 2.3 3.9 5.3 4.9 6.2 6.9 7.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2009-08-11
2011-08-24
2014-08-03
2014-08-25
2014-09-07
2015-08-18
2018-08-15
2018-09-10
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.3 24 8.4 26 6.5 25 8.6 24 8.4 29 8.8 26 7.3 22 8.2
1 24 8.5 24 8.4 24 6.6 24 8.8 24 8.0 27 8.9 26 7.1 22 8.2
2 23 7.7 23 8.5 24 6.4 24 8.6 24 7.9 26 9.0 26 6.9 22 8.2
3 22 7.4 23 8.3 23 6.2 23 7.0 24 8.0 24 7.7 26 6.1 22 8.2
4 21 4.7 23 8.3 22 2.8 21 4.0 23 5.2 24 4.9 25 5.8 22 7.9
5 20 0.6 23 8.7 22 1.6 21 1.4 23 7.6

Most recent temperature and dissolved oxygen profile plots

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