Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
T06 R11 WELS PISCATAQUIS 50 1 4.63 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
26 m
(86 ft) 		8 m
(25 ft) 		915 ha
(2,260 ac) 		70,724,912 m3
(57,338 ac-ft) 		104 km2
(40 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2017 Secchi Disk Transparency Data"

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
1987 3.0 4.4 5.0 3
1988 3.0 4.0 4.5 4
1989 9.6 19 6 3.0 4.1 5.1 6 5.3 5.3 5.3
1990 3.6 4.4 5.9 6
1991 3.5 4.4 5.8 6
1992 3.0 4.2 5.1 6
1993 4.0 4.6 5.0 6
1994 4.2 4.6 5.2 5
1995 4.1 4.7 5.6 5
1996 3.9 4.3 4.7 6
1997 3.7 4.4 4.9 6
1998 4.0 4.6 5.4 5
1999 10.0 33 5 3.9 4.6 5.9 6 2.7 2.7 2.7
2000 3.8 4.4 4.9 5
2001 3.2 4.2 4.6 6
2004 3.6 4.5 5.1 5
2005 4.3 5.0 5.7 6
2006 37 9.6 30 7.1 5 4.8 4.8 4.8 1 2.7 2.7 2.7
2007 4.4 4.7 5.2 6
2008 4.1 4.5 5.3 6
2009 4.1 4.5 5.3 5

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
37 9.7 27 7.1 5.3 3 4.5 5.9 5.2 2.7 3.6 5.3

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1989-09-12
1999-08-13
2006-08-17
Depth (m) TEMP DO TEMP DO TEMP DO
0 19 9.8 21 9.1 20 8.8
1 19 9.6 20 9.1 20 8.8
2 20 9.1 20 8.8
3 19 9.4 20 9.1 20 8.7
4 20 9.0 20 8.7
5 17 8.7 20 8.9 20 8.7
6 19 8.7 20 8.7
7 16 8.6 19 8.6 20 8.7
8 18 7.9 17 6.3
9 16 8.1 14 6.4 13 6.0
10 13 6.4 12 6.0
11 14 6.3 12 6.4 12 6.1
12 11 6.4 11 5.9
13 12 5.2 11 6.3 11 5.9
14 11 6.4 11 5.9
15 11 4.7 11 6.3 11 5.9
16 10 6.3 11 5.9
17 11 4.4 10 6.3
18 10 6.2 10 5.8
19 10 4.2 10 6.2
20 10 6.1 10 5.7
21 10 4.1
22
23 10 4.0 10 5.7
24 10 3.5 10 5.3

Recent temperature and dissolved oxygen profile plots

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