Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BLANCHARD PLT PISCATAQUIS 31 1 0.3 flushes/yr 704 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
38 m
(125 ft) 		15 m
(48 ft) 		99 ha
(245 ac) 		14,464,436 m3
(11,726 ac-ft) 		5 km2
(2.1 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
1986 7.9 7.9 7.9 1
1989 17 8 7.0 7.0 7.0 1 3.1 3.1 3.1
1990 2.7 2.7 2.7
1991 12.0 25 6.7 9 6.0 7.6 8.5 6 3.4 3.4 3.4
1992 7.5 8.5 9.5 6
1993 6.5 6 7.5 9.2 10.0 4 1.6 1.6 1.6
1994 7.0 6 10 7.5 8.8 10.0 6 2.3 2.3 2.3
1995 7.5 8.1 10.0 4
1996 33.4 12 7 5 6.1 6.7 7.0 3 5.2 5.2 5.2
1998 4.7 6.7 8.3 5
1999 6.1 7.4 8.6 5
2000 7.0 20 9 4.8 6.6 7.5 4 8.5 8.5 8.5
2001 7.5 7.7 7.9 2
2002 7.2 7.6 8.5 4 1
2003 6.1 6.9 7.5 5
2007 5.8 6.2 7.1 4
2008 14 5.3 21 6.9 6 5.0 6.1 6.7 4
2009 5.3 5.9 6.6 6
2010 5.5 6.6 7.7 5
2011 4.0 5.3 6.5 5
2012 4.6 5.4 6.3 6
2013 14 5.8 19 7.0 7 5.0 5.7 7.2 3 1.9 1.9 1.9
2014 5.3 6.0 6.4 5
2015 5.3 6.6 7.5 4
2016 6.1 6.6 7.1 2
2017 6.1 6.8 7.5 3
2018 14 8.5 24 7.0 9 6.2 6.9 7.9 3 6.0 6.0 6.0

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
14 11 20 6.9 7.6 6 7.5 4 7 10 4.1 1.6 3.9 8.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1991-08-21
1993-08-27
1994-08-16
1996-08-21
1996-08-28
2000-08-21
2013-08-20
2018-08-23
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20.2 8.7 24.0 8.5 21.2 8.6 22.1 8.7 23.1 8.6 20.3 9.0 21.6 8.4 23.2 8.5
1 20.2 8.7 23.1 8.5 21.2 8.7 22.1 8.7 22.9 8.7 21.4 8.4 23.2 8.5
2 20.2 8.7 23.0 8.5 21.1 8.6 22.1 8.8 20.0 9.0 21.3 8.4 23.3 8.5
3 20.2 8.7 23.0 8.5 21.1 8.6 21.7 8.7 21.9 8.7 21.2 8.5 23.3 8.5
4 20.2 8.7 22.8 8.5 21.1 8.6 21.3 8.7 21.4 8.7 19.8 9.0 20.8 8.5 23.2 8.5
5 20.2 8.7 22.1 8.5 21.1 8.6 18.4 9.0 20.3 8.9 18.4 9.4 23.2 8.4
6 19.0 8.9 21.3 8.5 18.0 11.9 14.5 8.7 15.0 8.7 19.1 9.4 15.3 11.2 23.0 8.6
7 16.2 10.2 16.6 11.2 13.3 12.8 11.0 8.8 12.0 8.5 9.6 10.1 16.8 12.2
8 13.7 11.6 13.0 11.7 10.2 12.6 9.0 9.1 9.7 8.8 10.0 10.0 7.9 9.4 13.4 12.4
9 10.3 11.0 10.8 11.3 8.8 12.2 7.8 8.8 8.0 8.6 6.8 9.2 10.6 10.3
10 8.3 10.8 9.1 11.0 7.5 10.8 7.2 8.5 7.4 8.3 7.1 8.8 5.9 9.2 9.2 10.0
11 7.0 10.4 7.8 10.0 6.9 9.8 6.8 8.3 7.0 8.2 5.4 9.0 7.6 8.5
12 6.5 10.2 7.0 9.6 6.5 9.7 6.5 8.2 6.8 8.2 6.0 8.2 5.1 8.7 6.8 8.0
13 6.0 10.1 6.7 8.9 6.2 9.7 6.2 8.0 6.1 8.2 5.0 8.7 6.3 7.7
14 6.0 9.8 6.5 8.8 6.0 9.6 6.0 8.1 5.4 8.2 4.9 8.7 6.1 7.5
15 5.8 9.8 6.2 8.7 6.0 9.5 6.0 8.0 5.9 7.9 4.7 8.7 5.9 7.4
16 5.7 7.7 5.0 8.2
17 5.5 9.5 5.9 8.0 5.5 7.7 4.4 8.4 5.6 6.6
18 5.5 7.7 5.0 8.2
19 5.1 9.1 5.5 7.8 5.3 7.5 4.3 8.1 5.4 6.6
20 5.5 8.5 5.6 7.8 5.2 7.5 4.8 8.0
21 5.1 8.8 5.3 7.3 5.2 7.5 4.3 7.8 5.2 6.4
22 4.5 7.4
23 5.0 8.5 5.2 7.1 4.2 7.4 5.1 6.3
24 4.5 7.2
25 5.0 8.3 5.1 6.9 5.2 8.0 5.3 7.4 5.0 7.0 4.2 6.8 5.0 6.0
26 4.5 6.6
27 5.0 8.2 5.1 6.6
28 5.0 6.8 4.5 6.3
29 5.0 8.0 5.1 6.4
30 5.0 7.7 5.1 6.1 5.2 7.1 5.2 7.1 5.0 6.6 4.5 5.8 4.2 6.4 5.0 5.5
31
32
33
34
35 4.9 7.2 5.0 5.2 5.1 6.0 5.1 6.3 5.0 5.1 4.5 4.5 4.2 1.0 4.9 4.2
36
37
38
39
40 5.1 5.0 4.9 3.6

Most recent temperature and dissolved oxygen profile plots

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