Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
AURORA HANCOCK 24 1 1.04 flushes/yr 341 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(55 ft) 		6 m
(20 ft) 		188 ha
(464 ac) 		11,361,966 m3
(9,211 ac-ft) 		17 km2
(6.4 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
1982 5.5 30 2 6 6.7 6.7 6.7 1 1.6 1.6 1.6
2001 5.2 29 7 7 7.4 7.4 7.4 1 2.4 2.4 2.4
2003 5.3 6.4 6.9 3
2010 5 7 7.2 7.4 7.5 1 2.0 2.0 2.0

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
5.3 30 7 4.7 6.5 5.3 7 7.5 1.5 1.6 2 2.4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1982-09-08
2001-08-15
2010-08-25
Depth (m) TEMP DO TEMP DO TEMP DO
0 18 9.1 24 8.1 22 8.3
1 18 9.1 24 8.1 22 8.2
2 18 8.9 24 8.1 22 8.2
3 18 9.0 23 8.0 22 8.2
4 18 9.0 23 8.0 22 8.2
5 18 9.0 23 8.0 22 8.2
6 18 9.0 20 7.1 22 7.9
7 18 9.0 16 5.5 22 7.7
8 18 9.0 13 5.1 20 4.4
9 18 9.0 12 5.0 16 2.3
10 17 8.3 11 4.6 15 2.1
11 13 3.2 11 4.3 14 1.9
12 11 2.3 10 4.1 14 1.8
13 11 1.7 10 3.9 14 1.3
14 10 1.1 14 1.0
15 13 0.8

Most recent temperature and dissolved oxygen profile plots

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