Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
ARROWSIC SAGADAHOC 6 1 1.61 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
3 m
(11 ft) 		2 m
(7 ft) 		18 ha
(44 ac) 		393,842 m3
(319 ac-ft) 		1 km2
(0.3 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
1981 160 1.50 1.66 2.0 3 19.8 19.8 20
1982 3.5 159 51 1.00 1.51 2.5 6 10.9 26.2 50
1983 6.0 70 49 1.00 1.66 2.3 5 23.9 56.4 98
1984 4.0 82 53 0.90 1.27 1.8 5 38.5 62.1 136
1985 6.0 158 51 68 0.60 1.46 2.1 6 22.9 53.2 92
1986 4.0 130 76 0.50 0.99 1.4 6 27.6 45.0 62
1987 67 0.50 0.81 1.5 7 9.4 23.8 38
1988 52 2.00 2.00 2.0 1 18.6 18.6 19
1990 3.4 110 6.2 44 1.40 1.60 2.0 6 31.0 31.0 31
1991 4.0 160 6.2 43 1.30 1.74 2.2 5 35.9 35.9 36
1992 1.30 1.57 1.8 6
1993 0.80 1.41 2.2 6
1994 0.80 1.34 1.7 6
1995 0.80 1.69 2.3 6
1996 1.50 1.90 2.3 6
1997 0.90 1.79 2.5 6
1998 5.5 244 64 1.10 1.80 2.7 7 54.0 54.0 54
1999 3.0 25 51 0.60 1.58 2.3 7 89.0 89.0 89
2000 1.10 1.84 2.2 6
2001 1.30 1.71 2.9 6
2002 1.26 1.53 2.1 6
2003 40 1.29 1.81 2.4 7
2004 75 20.2 237 34 28 56 35 1.34 1.79 2.3 10 9.6 14.0 17
2005 31 0.89 1.84 2.3 11 4.7 10.8 17
2006 40 1.10 1.55 2.2 7
2007 0.97 1.48 2.0 8
2008 40 3.8 166 6.8 9 33 1.20 1.60 2.4 7 1.6 22.6 50
2009 118 30 0.93 1.56 2.1 10 3.4 27.4 74
2010 29 0.75 1.74 2.6 10 5.6 17.8 34
2011 199 24 1.30 2.02 2.8 10 12.8 13.7 14
2012 124 26 1.11 2.04 2.6 10
2013 28 1.54 2.15 2.7 10
2014 1.33 2.14 2.9 8
2015 56 6.0 202 6.8 48 42 1.40 1.87 2.5 11 7.5 17.5 33
2016 374 28 1.76 2.12 2.5 8 6.6 9.7 12
2017 564 6.4 28 22 21 2.15 2.44 2.8 9 5.2 7.9 11

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
57 5.8 204 6.4 59 33 38 54 0.5 1.7 2.9 7.1 1.6 31 136

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-02
2016-08-16
2016-09-12
2016-09-27
2017-08-08
2017-08-22
2017-09-05
2017-09-19
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 26 7.2 26 7.7 22 6.3 18 7.8 24 7.5 24 8.3 19 8.3 21 8.2
1 25 6.8 26 7.5 22 6.2 18 7.5 24 7.4 24 8.2 19 8.3 22 8.1
2 25 6.2 25 4.8 22 6.0 17 7.2 24 7.4 24 7.7 19 8.2 22 7.4
3 24 1.0 23 2.5 19 2.2 21 0.1
4
5 19 8.2

Recent temperature and dissolved oxygen profile plots

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