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 2.0 2 6.2
1978 4.7 5.2 6.2 7.0 5 4 1.0 1.4 1.7
1984 4.8 5.5 6.0 6
1985 5.0 5.8 6.5 5
1989 8.2 8.2 8.2 1 1.7 1.7 1.7

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
10 3.3 2 6.2 4.8 6.4 8.2 4.2 1 1.5 1.7

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L

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Most recent temperature and dissolved oxygen profile plots

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