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 6.3
1984 4.5 4.5 4.5 1
1989 7.3 8.7 10.0 6
1990 8.5 30 7.1 3 8.7 8.7 8.7 1

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
8.5 30 7.1 3 6.3 4.5 7.3 10 2.7 Inf 1

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
1990-09-11
Depth (m) TEMP DO TEMP DO
0 18 8.9
1 18 8.8 18 8.8
2 18 8.8
3 18 8.8
4 18 8.8
5 19 8.8 18 8.8
6 18 8.8
7 18 9.0 18 8.8
8 18 8.8
9 17 8.8 18 8.6
10 17 8.4
11 17 8.2
12 14 8.2 16 8.2
13 14 8.0
14 13 7.7
15 13 7.5
16 12 8.8 13 0.8

Most recent temperature and dissolved oxygen profile plots

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