Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BROWNFIELD OXFORD 4 1 2.4 flushes/yr 363 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(20 ft)
3 m
(9 ft)
33 ha
(82 ac)
936,496 m3
(759 ac-ft)
3 km2
(1.3 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
1977 3.5 4.1 4.5 3
1978 12 3.5 4.3 5.3 6 3.0 3.0 3.0
1979 3.5 4.2 5.3 5
1980 3.4 4.2 4.6 3
1982 7.0 45 10 4.0 4.2 4.5 4 1.7 1.8 1.9
1983 3.0 3.8 4.5 7
1984 3.5 3.9 4.2 7
1985 4.7 34 10 3.6 4.1 5.0 6 1.5 2.9 4.9
1986 5.0 5.8 6.2 5
1987 4.5 5.2 6.0 3
1988 3.5 4.8 6.0 7 1
1990 4.2 4.6 5.0 6
1991 3.5 4.8 6.0 6
1992 4.1 4.7 5.5 6
1993 4.6 5.1 5.5 6
1994 3.5 3.8 4.1 6
1995 5.0 5.3 5.6 3
1996 3.7 4.0 4.6 6
1997 8.0 44 7.1 10 4.2 4.3 4.3 1 3.0 3.0 3.0
2009 5.0 6.0 7.0 3
2010 8 4.0 5.2 7.0 8 16 2.1 2.1 2.1
2011 4.0 4.5 5.3 5 3
2012 4.1 4.6 5.3 6
2013 4.4 4.8 5.3 5 4
2014 5.0 5.5 6.0 4 4
2015 6 10.0 50 7.2 7 4.7 5.2 5.6 4 8 3.7 3.7 3.7
2016 4.1 4.9 5.3 6 7
2017 4.0 4.5 5.0 4 3
2018 3.1 3.8 5.1 2 3

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 7.4 43 7.2 9.5 3 4.6 7 4.9 1.5 2.8 4.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

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Most recent temperature and dissolved oxygen profile plots

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