Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
E MIDDLESEX CANAL GR PISCATAQUIS 41 1 5.41 flushes/yr 1045 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
5 m
(16 ft)
2 m
(5 ft)
415 ha
(1,025 ac)
6,096,428 m3
(4,942 ac-ft)
39 km2
(15 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 2018 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 1.5 1.7 2.5 5
1988 1.5 1.6 1.8 3
1989 22 1.5 1.5 1.5 1
1990 9.5 39 7.1 37 1.6 1.6 1.6 1 13.6 13.6 13.6
1998 14.0 39 22 1.5 1.6 1.9 5 6.9 6.9 6.9
1999 1.4 1.6 1.7 6
2000 11.5 36 19 1.6 1.8 2.1 5 7.1 7.1 7.1
2001 1.7 2.0 2.3 5
2002 1.2 1.7 2.2 5
2003 1.6 1.9 2.4 5
2004 1.1 1.5 1.7 6
2005 24 10.6 36 7.0 18 1.7 1.8 2.6 5
2006 1.3 1.6 2.5 5
2007 1.6 1.8 2.2 6
2008 1.6 1.9 2.2 5
2009 14 1.5 1.8 2.3 6

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
24 11 38 7.1 26 18 1.1 1.7 2.6 4.6 6.9 9.2 14

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1989-09-06
1990-09-11
1998-08-19
2000-08-16
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 17 9.3 20 8.4 21 8.9
1 16 8.8 17 9.4 20 8.3 21 9.0
2 16 7.2 17 9.4 20 7.9 21 8.8
3 16 6.0 21 8.8
4 21 8.6

Most recent temperature and dissolved oxygen profile plots

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