Processing math: 100%

Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
SUMNER OXFORD 11 1 0.4 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
4 m
(14 ft) 		3 m
(9 ft) 		325 ha
(803 ac) 		8,480,136 m3
(6,875 ac-ft) 		4 km2
(1.5 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 (μS/cm), pH: pH (standard units)

TP = Total Phosphorus (μg/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 (μg/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
1979 10 12 2.4 2.9 3.5 4 4.7 4.7 4.7
1980 2.7 3.1 3.7 5 5
1981 6 38 18 2.7 3.3 3.8 5 5 6.8 6.8 6.8
1982 2.1 3.0 3.4 5 2
1983 2.7 3.4 5.5 5
1984 5 14 2.7 3.2 4.0 5 3 4.7 4.7 4.7
1985 3.0 3.1 3.4 4 2
1986 2.4 2.9 3.4 5 1
1987 7 26 34 3.4 3.5 4.5 5 1
1988 2.7 3.3 3.7 5 2
1989 2.7 3.1 3.7 5 1
1990 2.7 3.1 4.0 5 4
1991 6 28 6.8 15 2.5 3.0 3.5 5 1 4.1 4.1 4.1
1992 2.7 3.0 3.4 5 1
2017 21 10 57 7.0 13 4.0 4.0 4.0 1 2 6.8 6.8 6.8

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
21 7.3 37 6.9 19 12 2.1 3.2 5.5 4.6 4.1 5.4 6.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1981-09-21
1984-08-21
1987-09-03
1991-08-27
2017-08-28
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 18 9.4 24 8.1 19 9.2 22 8.6 22 8.8
1 18 9.4 24 7.6 19 9.2 22 8.5 22 8.9
2 18 9.4 24 7.8 19 9.2 22 8.4 21 8.9
3 17 9.2 23 7.7 19 9.2 22 8.4 21 8.6
4 23 6.1 19 9.2 21 5.4 21 8.4

Recent temperature and dissolved oxygen profile plots

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