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
1975 5.4 5.5 6.6 8.4 4 1.4 1.7 2.0
1976 6.8 3.0 6.2 8.0 8 6 1.1 1.5 2.2
1977 4.8 4.0 4.5 3.4 5.7 6.7 8 1 1.2 1.8 3.9
1978 9.5 3.5 5.9 7.0 5 3 1.0 1.4 2.1
2003 9 9.2 32 7.0 7.5 7.5 7.6 2 1 1.4 1.5 1.6

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
9 9.2 32 6.2 6.3 4.5 3 6.4 8.4 5.4 1 1.6 3.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2003-08-26
Depth (m) TEMP DO
0 21 8.7
1 20 8.7
2 20 8.7
3 20 8.6
4 20 8.6
5 20 8.6
6 19 8.8
7 20 8.8

Recent temperature and dissolved oxygen profile plots

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