Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
DEXTER PENOBSCOT 32 1 0.39 flushes/yr 433 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
26 m
(86 ft) 		9 m
(31 ft) 		417 ha
(1,030 ac) 		39,117,152 m3
(31,713 ac-ft) 		26 km2
(9.8 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
1975 3.7 4.4 5.3 6
1976 34 86 9 8 13 3.0 4.6 5.9 6 2.2 2.7 3.2
1983 4.0 4.0 4.0 1
1984 4.5 4.5 4.5 1
1991 4.0 4.8 5.5 5
1992 5.0 5.3 6.0 4
1993 4.5 5.3 6.5 5
1994 3.0 5.0 6.0 6
1995 4.0 5.0 6.5 5
1997 3.2 3.4 3.6 4

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
34 86 9 8 13 3 4.6 6.5 4.3 2.2 2.7 3.2

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1975-09-06
1975-09-13
1976-08-02
1976-08-08
1976-08-14
1976-08-21
1976-08-24
1976-09-06
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18 9.5 16 9.5 21 9.2 20 8.0 24 9.9 25 9.6 24 8.4 18 9.0
1 18 9.6 16 9.4 21 8.7 20 8.0 23 8.9 24 9.7 23 8.1 18 8.8
2 18 9.5 16 9.3 20 8.6 20 8.0 23 8.8 23 10.1 21 4.8 18 8.7
3 18 9.5 16 9.2 20 8.6 20 8.0 21 8.6 22 10.5 18 8.7
4
5 18 9.6 16 9.4 20 8.4 20 7.9 20 7.9 21 10.2 18 8.7
6 18 9.7 16 9.0 20 8.2 20 7.5 20 7.2 21 9.3 18 8.0
7 18 6.5 16 8.3 19 4.5 20 4.8
8 18 4.0 19 3.6

Most recent temperature and dissolved oxygen profile plots

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