Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
WILLIMANTIC PISCATAQUIS 42 1 0.68 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
25 m
(83 ft) 		8 m
(25 ft) 		131 ha
(324 ac) 		9,820,947 m3
(7,962 ac-ft) 		6 km2
(2.3 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
1983 8 5 9 5.8 7.1 8.6 5 1.6 1.6 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
8 5 9 5.8 7.1 8.6 5 1.6 1.6 1.6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1983-08-15
Depth (m) TEMP DO
0 23.0 8.0
1
2 22.0 8.1
3
4 22.0 8.3
5
6 20.0 8.6
7 16.0 10.3
8 11.5 10.0
9
10 8.5 8.6
11
12 7.5 8.5
13
14 7.0 7.4
15
16 6.5 6.7
17
18 6.5 6.3
19
20 6.0 6.3
21
22 6.0 6.0
23
24 6.0 6.0

Recent temperature and dissolved oxygen profile plots

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