Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
GREENVILLE PISCATAQUIS 41 1 0.32 flushes/yr 1029 ft
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 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
1972 10.0 10 6.3 5.0
1984 6.0 6 7.0 5.0 5.6 6.2 2 2.9 2.9 2.9
2003 11 8.5 30 5 3.2 8.5 9.6 10.7 2 1.3 1.4 1.6
2015 17 9.0 28 7.2 3 9.0 9.0 9.0 1 1.9 1.9 1.9

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
14 8.4 23 7.2 4.7 6.3 5.1 5 8.1 11 1.7 1.3 2.1 2.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1972-08-09
1984-08-22
2003-08-26
2015-09-01
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 20 8.5 20.9 8.7 22 8.8
1 19 9 21 8.5 20.5 8.7 21 8.8
2 20 8.6 20.3 8.7 21 8.8
3 19 9 20 8.6 20.2 8.7 21 8.8
4 20 8.5 20.1 8.7 21 8.8
5 20 8.5 20.1 8.7 21 8.7
6 20 8.5 20.0 8.7 20 8.7
7 20 8.5 19.9 8.7 20 8.7
8 20 8.5 19.8 8.7 20 8.7
9 20 8.5 19.0 8.7 20 8.6
10 20 8.4 18.2 8.8 20 8.6
11 20 8.3 17.1 8.9 20 8.5
12 17 7.7 15.8 9.1 18 7.8
13 16 7.8 12.3 9.4 17 7.8
14 16 7.7 10.9 9.6 16 7.6
15 14 7.6 10.1 9.7 15 7.6
16 14 7.6 10.0 9.8
17 14 7.6 10.0 9.8 15 7.5
18 9.9 9.8
19 9.9 9.7 13 7.5
20 9.9 9.8
21 9.9 9.7 13 7.5
22 9.9 9.7
23 9.9 9.7

Most recent temperature and dissolved oxygen profile plots

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