Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
DEDHAM HANCOCK 23 1 7.18 flushes/yr 273 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(21 ft) 		2 m
(8 ft) 		16 ha
(40 ac) 		402,858 m3
(327 ac-ft) 		4 km2
(1.4 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
1990 9.5 33 6.9 7.2 11 4.7 5.5 6.6 5 1 0.5 2.2 3.3
1996 9.0 36 8.0 6 6.3 6.3 6.3 1 2.7 2.7 2.7
2018 19 12.0 57 7.3 5.0 36 6.0 6.1 6.2 2 2.0 2.5 3.0

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
19 10 42 7 6.7 18 4.7 6 6.6 2.7 0.5 2.5 3.3

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1990-08-16
1996-08-20
2018-08-21
Depth (m) TEMP DO TEMP DO TEMP DO
0 26 8.5 23 8.2 25 8.4
1 25 8.6 23 8.2 25 8.4
2 24 8.5 22 8.1 24 8.3
3 24 8.4 21 7.9 24 8.2
4 18 12.5 17 6.7 23 8.5
5 14 7.9 14 6.0 18 12.9
6 12 0.5 11 1.1 15 1.7

Most recent temperature and dissolved oxygen profile plots

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