Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
ATTEAN TWP SOMERSET 39 1 6.27 flushes/yr 1157 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
16 m
(54 ft) 		4 m
(14 ft) 		1,089 ha
(2,690 ac) 		45,684,549 m3
(37,037 ac-ft) 		549 km2
(212 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 8.0 21 11 12 2.6 3.0 3.5 6 3.1 3.1 3.1
1983 2.5 3.1 3.7 6
1988 1.8 1.8 1.8
1989 9.5 30 6 4.4 4.4 4.4 1 3.9 3.9 3.9
1996 8.5 27 6 6 3.9 3.9 3.9 1 3.3 3.3 3.3

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
8.7 26 7.7 9 2.5 3.6 4.4 3.5 1.8 3 3.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1982-08-11
1989-09-11
1996-08-28
Depth (m) TEMP DO TEMP DO TEMP DO
0 19.0 8.1 20.2 9.7 21.3 8.9
1 19.0 8.3 20.4 9.7 21.3 9.0
2 19.0 8.2 20.0 9.7 20.6 9.0
3 19.0 8.3 18.0 10.0 20.2 8.1
4 19.0 8.3 17.4 9.8 19.8 7.8
5 19.0 8.3 16.8 9.4 19.2 7.2
6 19.0 7.8 16.2 8.8 18.4 6.4
7 17.5 6.1 16.0 8.4 16.3 5.1
8 14.5 4.1 15.6 7.6 14.1 3.7
9 10.8 3.3 15.0 5.6 12.1 1.9
10 9.8 3.0 11.8 1.6 11.2 1.3
11 8.0 2.7 11.0 0.9 10.5 1.0
12 8.0 1.8 10.6 0.6 10.1 0.7
13 10.0 0.4 9.9 0.6
14 10.0 0.4 9.8 0.6
15 10.0 0.4
16 9.8 0.3

Most recent temperature and dissolved oxygen profile plots

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