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 11 9.6 29 4.8 5.2 8.1 8.9 10.5 4 1.3 2.1 2.9
2004 16 9.4 32 7.2 6.0 4.0 7.2 8.1 8.9 2 1.4 1.4 1.5
2015 19 9.0 26 7.1 4.0 8.9 9.2 9.6 1 3.6 3.6 3.6

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
15 9.3 29 7.1 4.9 4.6 7.2 8.8 10 2.3 1.3 2.4 3.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2003-08-26
2004-08-16
2015-09-01
Depth (m) TEMP DO TEMP DO TEMP DO
0 19.5 8.5 20.6 8.9 21.5 8.5
1 19.5 8.4 20.6 8.9 21.5 8.6
2 19.5 8.5 20.6 8.8 21.5 8.6
3 19.5 8.4 20.6 8.9 21.3 8.5
4 19.5 8.4 20.5 8.8 21.3 8.5
5 19.5 8.4 20.4 8.8 21.3 8.5
6 19.5 8.4 20.4 8.8 21.3 8.4
7 19.5 8.5 20.3 8.8 21.3 8.4
8 19.5 8.4 20.3 8.8 21.2 8.4
9 16.6 8.7 20.3 8.8 21.1 8.4
10 14.1 9.1 20.2 8.8 21.1 8.4
11 13.0 9.3 20.1 8.8 21.1 8.4
12 11.8 9.6 20.0 8.8 20.7 8.1
13 10.6 10.0 18.6 8.8 18.9 7.8
14 10.0 10.2 17.2 8.6 15.6 8.3
15 9.3 10.4 15.6 8.8 13.8 8.5
16 8.7 10.5 14.1 9.1
17 8.5 10.6 13.1 9.1 11.8 8.9
18 8.4 10.7 12.5 9.6
19 8.2 10.7 12.0 9.7 10.0 9.2
20 8.1 10.7 11.1 10.1
21 10.9 10.0 9.7 9.2
22 10.7 10.0
23 10.5 10.1 9.3 9.3
24 10.2 10.1
25 7.4 10.9 9.7 10.3 8.9 9.6
26
27
28
29
30 7.1 10.9 8.9 10.8 8.3 9.6
31
32
33
34
35 6.9 11.0 8.4 11.0 7.9 9.7
36
37
38
39
40 6.8 10.9 8.2 10.7 7.8 9.6
41
42
43
44
45 7.7 9.5

Recent temperature and dissolved oxygen profile plots

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