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Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
GREENVILLE PISCATAQUIS 41 1 1 flushes/yr
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.

## [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 (μS/cm), pH: pH (standard units)

TP = Total Phosphorus (μg/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 (μg/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
1974 9.2 12 5 5.6 5.6 5.6 1 2.6 2.6 2.6
1975 8.3 18 10 5.6 6.2 6.7 2 2.7 2.7 2.7
1976 5 5.7 5.7 5.7 1 3.2 3.2 3.2
2012 7.0 7.0 7.0 1 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
8.8 15 5 7.5 5.6 6.1 7 1.2 2.6 2.8 3.2

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1974-08-14
1975-09-10
1976-08-23
Depth (m) TEMP DO TEMP DO TEMP DO
0 22.2 8.6 15.1 9.8 21.2 8.7
1 15.1 9.7 21.2 8.8
2 22.0 8.5 15.2 9.5 21.2 8.9
3 21.5 8.9 15.2 9.4 21.0 8.9
4 15.2 9.4 21.0 8.9
5 20.0 8.9 15.2 9.2 20.0 8.9
6 18.7 8.8 15.2 9.3 18.6 8.7
7 15.2 9.3 17.8 8.4
8 12.7 8.5 15.2 9.2 15.5 8.0
9 9.0 8.7 15.0 9.2 12.1 7.5
10 14.4 8.8 9.8 7.6
11 8.0 8.8 10.0 7.4 9.0 7.2
12 7.8 8.6 9.0 6.4 8.7 7.2
13 8.5 6.4 8.0 7.2
14 7.2 8.6 7.6 6.6
15 6.8 8.6 7.2 6.5 7.6 7.0
16 7.0 6.4
17 6.7 8.6 7.0 6.3 7.2 7.0
18 6.5 8.7 6.8 6.3
19 7.0 6.8
20 6.2 8.6 6.3 6.3
21 6.2 8.6 7.0 6.7
22 6.3 6.3
23 6.0 8.4 6.9 6.3
24 6.0 8.5 6.2 6.0 6.9 6.0
25
26 6.0 8.2 6.1 5.7
27 6.0 8.3
28 6.1 5.6
29 6.0 8.1 6.0 5.3
30 6.0 8.1

Recent temperature and dissolved oxygen profile plots

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