Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
GREENVILLE PISCATAQUIS 41 1 0.32 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
73 m
(240 ft) 		17 m
(55 ft) 		30,863 ha
(76,264 ac) 		5,193,000,000 m3
(4,210,034 ac-ft) 		1,032 km2
(398 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
2003 6.8 9.5 32 3.4 4.0 8.2 9.9 11.2 5 1.1 1.6 2.5
2004 14.5 8.5 32 7.2 5.5 3.2 8.3 9.1 9.8 2 1.1 1.5 1.9
2015 18.0 9.0 28 7.2 4.0 10.4 10.4 10.4 1 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
13 9 31 7.2 4.3 3.6 8.2 9.8 11 2.7 1.1 1.5 2.5

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2003-08-26
2003-09-26
2004-08-16
2015-09-01
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 18.9 8.6 16.4 9.2 20.6 8.9 22.3 8.7
1 18.9 8.8 16.4 9.4 20.5 8.9 21.5 8.7
2 18.9 8.8 16.4 9.4 20.4 8.9 21.1 8.7
3 18.9 8.8 16.4 9.4 20.4 8.9 20.8 8.7
4 18.9 8.8 16.4 9.4 20.3 8.9 20.7 8.6
5 18.9 8.8 16.4 9.4 20.2 8.9 20.6 8.6
6 18.9 8.8 16.4 9.2 20.1 8.9 20.5 8.6
7 18.9 8.8 16.4 9.1 20.0 8.9 20.4 8.6
8 18.9 8.8 16.4 8.9 20.0 8.9 20.4 8.5
9 18.9 8.8 16.4 8.7 20.0 8.9 20.4 8.5
10 18.9 8.8 16.4 8.6 19.9 8.9 20.2 8.5
11 17.9 9.2 16.4 8.4 19.2 8.8 18.8 8.0
12 16.7 9.0 16.1 8.3 18.1 8.8 17.4 8.0
13 13.8 9.2 15.5 8.2 17.2 8.7 16.2 7.9
14 12.0 9.4 14.9 8.1 16.0 8.7 15.2 8.1
15 11.5 9.5 14.8 8.0 15.0 8.9 14.7 8.3
16 11.2 9.6 13.5 8.0 14.4 8.9
17 12.6 8.0 14.1 8.9 13.7 8.4
18 10.2 9.8 12.2 8.0 13.8 9.0
19 12.1 7.9 13.7 9.0 13.3 8.4
20 10.0 9.9 12.0 7.8 13.6 9.0
21 11.8 7.8 13.5 9.1 12.7 8.4
22 11.2 7.8 13.4 9.1
23 13.4 9.1 12.4 8.5
24 13.2 9.1
25 9.2 10.1 10.5 7.9 13.1 9.2 11.9 8.6
26
27
28
29
30 8.9 10.1 9.8 7.9 12.6 9.4 11.3 8.8
31
32
33
34
35 8.7 10.2 9.1 7.9 11.0 9.8 10.0 8.8
36
37
38
39
40 8.1 10.0 8.7 7.7 10.3 9.8 9.2 8.6
41
42
43
44
45 8.0 9.8 8.4 7.8 9.4 9.5 9.0 8.3

Recent temperature and dissolved oxygen profile plots

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