Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
PARKMAN PISCATAQUIS 31 1 20.48 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(25 ft) 		2 m
(5 ft) 		67 ha
(165 ac) 		987,533 m3
(801 ac-ft) 		21 km2
(8 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

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
2009 4.1 4.9 5.9 3
2010 9 5.0 5.2 5.5 3 1.6 1.6 1.6
2011 4.4 4.6 4.9 2
2012 4.8 5.2 5.7 2
2013 5.0 5.4 5.9 3
2014 2.1 3.5 4.6 2
2015 21 35 82 7.6 9 45 3.5 4.8 5.7 5 3.1 3.1 3.1
2016 5.2 5.8 6.5 4
2017 4.1 4.6 5.3 4

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
21 35 82 7.6 9 45 2.1 4.9 6.5 3.1 1.6 2.4 3.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2010-08-11
2015-08-13
Depth (m) TEMP DO TEMP DO
0 24 8.4 24 8.5
1 24 8.5 24 8.5
2 24 8.4 23 8.6
3 23 8.5 22 8.0
4 21 7.6 18 6.7
5 17 9.6 14 4.5
6 14 2.6 11 0.5
7 10 0.4

Recent temperature and dissolved oxygen profile plots

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