Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PORTER OXFORD 4 1 3.1 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(43 ft) 		6 m
(19 ft) 		23 ha
(57 ac) 		1,302,932 m3
(1,056 ac-ft) 		6 km2
(2.1 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
1993 3.7 6.0 7.0 4
1994 5.4 5.9 6.0 5
1995 5.5 6.4 8.1 5
1996 6.0 6.6 7.4 4
1997 5.1 6.3 7.1 5
1998 10.5 40 11 16 3.4 4.5 5.7 6 9.1 9.1 9.1
1999 5.7 6.6 7.8 5
2000 5.7 6.0 6.4 5
2001 7.3 52 7.0 22 5.7 6.8 8.4 5 6.4 6.4 6.4
2002 5.0 6.3 6.9 5
2003 6.0 6.5 6.7 5
2005 4.6 5.5 6.0 4
2006 22 8.6 41 7.0 7 17 5.9 6.1 6.3 1 3.5 3.5 3.5
2012 45 6.3 3.5 3.5 3.5 1
2016 9 9.0 48 7.2 6 43 8.0 8.0 8.0 1 2.5 2.5 2.5

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
16 8.8 45 6.7 12 25 3.4 6.1 8.4 4.1 2.5 5.4 9.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1998-08-20
2001-08-30
2006-08-14
2012-08-02
2016-09-06
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.5 8.9 23.8 9.1 23.1 7.4 25.9 8.1 23.2 8.6
1 23.6 8.9 23.5 9.3 22.1 7.4 25.8 8.4 23.1 8.6
2 22.8 9.0 23.3 9.2 22.0 7.3 25.4 8.4 23.1 8.5
3 20.8 8.5 23.1 9.3 21.9 7.2 23.2 7.0 23.1 8.5
4 16.0 5.5 22.9 9.3 17.7 5.9 18.5 7.4 23.0 8.5
5 13.1 4.1 18.0 12.6 13.5 5.3 14.6 7.0 23.0 8.5
6 10.6 4.2 11.9 11.6 10.8 5.2 12.2 7.6 18.0 12.3
7 8.6 2.5 9.4 8.1 8.9 5.8 10.2 5.4 13.4 9.8
8 7.7 1.2 7.7 3.8 7.6 3.8 8.9 2.6 11.0 6.5
9 7.0 0.3 6.9 0.8 6.8 2.0 8.2 0.1 9.1 1.5
10 6.8 0.2 6.4 0.3 6.4 0.2 7.7 0.1 8.0 1.0
11 6.8 0.2 6.3 0.2 6.3 0.1 7.6 0.1 7.4 0.8
12 6.8 0.2 6.2 0.2 6.2 0.1 7.4 0.1 7.2 0.8

Recent temperature and dissolved oxygen profile plots

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