Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
UNION KNOX 14 1 46.91 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
11 m
(37 ft) 		4 m
(14 ft) 		98 ha
(242 ac) 		4,194,556 m3
(3,401 ac-ft) 		23 km2
(8.9 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
1997 9 45 7.2 15 22 2.1 2.9 3.4 1 7.3 7.3 7.3
2000 12 46 16 31 3.6 3.6 3.6 1 5.4 5.4 5.4
2015 23 11 49 7.1 10 42 4.6 4.6 4.6 1 3.0 3.0 3.0

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
23 11 47 7.1 14 32 2.1 3.7 4.6 1 3 5.2 7.3

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1997-08-18
2000-08-21
2015-09-09
Depth (m) TEMP DO TEMP DO TEMP DO
0 23 7.8 22 8.0 25 8.3
1 23 7.8 22 8.0 25 8.2
2 23 7.7 22 8.0 24 8.2
3 23 7.5 22 8.0 24 7.3
4 22 4.5 22 7.8 22 2.7
5 19 0.4 17 0.2 20 0.5
6 15 0.3 15 0.2 16 0.4
7 14 0.3 13 0.2 13 0.4
8 13 0.3 13 0.2 12 0.4
9 12 0.2 12 0.2 11 0.4
10 12 0.2 12 0.2 11 0.3

Recent temperature and dissolved oxygen profile plots

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