Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
STONEHAM OXFORD 10 1 2.64 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
2 m
(5 ft) 		0 m
(2 ft) 		106 ha
(262 ac) 		5,133,959 m3
(4,162 ac-ft) 		12 km2
(4.7 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
1953
1973 4.3 4.3 4.3 1
1979 3 37 5.8 5.8 5.8 1
1983 7 9.5 3.4 4.5 5.8 4 3.5 3.5 3.5
1986 10 40 4.3 4.3 4.3 1
1987 5 16 5.0 14 6.3 6.3 6.3 1 2.2 2.2 2.2

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
6.4 31 7.2 14 3.4 5 6.3 1.6 2.2 2.8 3.5

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1953-08-06
1979-08-21
1983-09-19
1986-09-11
1987-09-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 21 8.6 19.8 9.8 18 9.0 19.2 9.0
1 19.3 9.9 19.0 9.0
2 20 8.4 19.1 9.9 18 9.0 18.8 9.0
3 20 8.2 18.9 9.9 18 8.5 18.7 9.0
4 18.9 9.9 18.5 8.9
5 18.9 9.7 18 8.5 18.4 8.9
6 16.1 6 18.0 7.9 17 7.5 18.0 8.0
7 13.2 1.4 16.5 4.6
8 18 8.2 11.7 4 10.9 1.0 13 0.1 13.0 0.8
9 15 6.0 10.0 3 9.9 1.0 11 0.1 10.7 0.8
10 9.5 1.0
11 9.4 3 9 0.1 8.7 0.7
12 12 5.0 8 0.1 8.2 0.2
13 8.9 1 8.1 0.1
14 8 0.1
15 8 0.1

Recent temperature and dissolved oxygen profile plots

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