Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
PORTER OXFORD 4 1 0.48 flushes/yr 533 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
32 m
(105 ft) 		14 m
(46 ft) 		89 ha
(220 ac) 		12,376,490 m3
(10,034 ac-ft) 		9 km2
(3.4 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 2018 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
1992 7.5 8.2 8.8 5
1993 8.1 9.0 9.8 6
1994 7.6 8.3 9.2 6
1995 7.8 8.5 9.0 5
1996 6.6 7.6 8.4 4
1997 8.6 8.8 9.2 4
1998 7.0 24 5 6.3 7.1 7.9 4 2.4 2.4 2.4
1999 4.6 7.2 8.5 6
2000 7.0 27 6 7.5 7.5 7.5 1 1.2 1.2 1.2
2001 6.5 25 7.1 6 9.1 9.1 9.1 1 2.0 2.0 2.0
2006 5 5.7 6.6 7.3 5
2007 4 6.6 8.0 9.0 4
2008 12 6.0 25 6.8 4 7.5 7.7 8.2 3
2009 3 6.0 7.0 7.5 4
2010 8.2 8.8 9.3 3
2011 7.4 7.7 7.8 3
2013 9 7.1 25 7.1 3 6.8 7.8 9.6 4 1.3 1.3 1.3

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
10 6.7 25 7 5 4 4.6 7.9 9.8 4 1.2 1.7 2.4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1998-08-20
2000-08-23
2001-08-30
2013-08-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 22.9 7.5 21.9 8.9 23.3 8.4 25.8 8.2
1 22.9 7.5 21.9 9.0 23.1 8.5 23.8 8.3
2 22.9 7.5 21.8 9.0 22.9 8.5 23.6 8.3
3 22.8 7.5 21.5 9.0 22.9 8.5 23.5 8.3
4 22.8 7.5 21.3 9.0 22.8 8.4 23.2 8.3
5 20.2 8.3 21.1 8.9 22.5 8.6 22.7 8.4
6 14.6 9.8 19.4 10.0 18.4 12.6 19.2 10.7
7 12.0 9.7 14.4 12.6 13.3 13.6 14.0 12.9
8 10.0 9.2 11.4 12.7 10.5 13.6 10.1 13.2
9 8.9 8.6 9.4 12.1 8.5 12.9 8.7 12.8
10 8.0 8.3 7.9 11.0 7.2 12.0 7.8 12.4
11 7.0 8.0 7.3 10.9 6.2 11.1 7.1 11.9
12 6.9 7.9 6.9 10.8 5.8 10.5 6.5 11.5
13 6.5 7.9 6.6 10.7 5.5 9.9 6.0 11.1
14 6.3 7.9 6.4 10.6 5.2 9.8 5.8 10.8
15 6.1 7.9 6.3 10.5 5.0 9.5 5.7 10.6
16 6.0 7.9 4.7 9.4
17 5.9 7.8 4.6 9.3 5.6 10.5
18 5.8 7.9 4.5 9.3
19 5.5 7.7 4.4 9.3 5.4 10.4
20 5.5 7.8 5.7 10.2 4.3 9.4
21 5.4 7.6 5.3 10.1
22 5.3 7.5
23 5.3 7.4 5.1 10.0
24 5.2 7.1
25 5.2 7.0 5.5 9.4 4.2 7.6 5.0 10.0
26 5.2 6.4
27 5.1 6.1 5.0 7.8
28 5.1 6.0
29 5.1 5.9 4.8 8.7
30 5.1 5.7 4.2 5.6

Most recent temperature and dissolved oxygen profile plots

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