Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
GREENVILLE PISCATAQUIS 41 1 1 flushes/yr 1122 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
32 m
(106 ft) 		9 m
(29 ft) 		558 ha
(1,378 ac) 		49,400,000 m3
(40,049 ac-ft) 		15 km2
(5.7 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
1976 8.0 28
2003 6.8 9.6 11.2 5
2004 10 9.5 29 7.3 3 6.6 8.3 9.8 4 1.8 1.8 1.8
2005 5.8 7.1 8.3 5
2006 5 5.8 6.8 7.7 5
2007 5.0 7.2 9.1 5
2008 9 7.3 25 7.1 5 5.3 7.0 8.3 5
2009 5.8 7.5 8.9 3
2011 3 7.5 7.5 7.5 1 1.7 1.7 1.7
2012 7.0 7.4 8.1 5
2013 6.2 7.4 8.2 7
2014 5.0 7.3 8.9 8
2015 6.9 7.6 8.7 2
2016 10 10.0 26 7.3 4 5.1 7.7 9.4 8 1.1 1.1 1.1
2017 8.2 8.5 8.9 4
2018 5.1 8.1 9.1 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
9.7 8.7 27 7.2 3.5 4.3 5 7.7 11 4.8 1.1 1.5 1.8

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2004-08-16
2011-09-01
2016-08-10
Depth (m) TEMP DO TEMP DO TEMP DO
0 21.5 8.7 20.6 8.5 22.1 8.5
1 21.5 8.7 20.3 8.5 22.1 8.5
2 21.5 8.8 19.8 8.6 22.0 8.5
3 21.5 8.8 19.6 8.5 22.0 8.5
4 21.5 8.8 19.6 8.5 21.9 8.5
5 21.3 8.8 19.5 8.5 21.9 8.4
6 21.1 8.8 19.5 8.5 21.9 8.4
7 21.1 8.8 19.5 8.5 21.8 8.4
8 20.9 8.7 16.8 7.9 16.7 8.3
9 17.2 7.4 12.4 7.8 14.6 8.3
10 14.8 6.9 9.9 7.6 12.9 8.3
11 13.4 7.0 9.0 7.7 11.7 8.2
12 12.4 6.9 8.5 7.8 10.6 8.2
13 11.5 6.9 7.9 8.1 9.9 8.1
14 10.7 6.8 7.6 8.2 9.4 8.1
15 10.2 6.6 7.3 8.3 9.0 7.9
16 9.8 6.7
17 8.9 6.9 6.9 8.4 8.6 8.0
18 8.5 6.8
19 8.3 6.7 6.6 8.4 8.3 7.8
20 8.1 6.8
21 8.0 6.9 6.4 8.3 8.2 7.7
22 7.9 6.9
23 7.8 6.6 6.4 8.3 8.0 7.6
24
25 6.2 8.1 7.9 7.6
26
27 6.1 7.9
28
29 6.1 7.6
30 7.6 7.0

Most recent temperature and dissolved oxygen profile plots

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