Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
EAST MACHIAS WASHINGTON 26 1 18.06 flushes/yr 38 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
9 m
(31 ft) 		4 m
(11 ft) 		674 ha
(1,665 ac) 		23,717,084 m3
(19,228 ac-ft) 		282 km2
(109 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
1977 2.3 2.9 3.8 5
1979 9.0 25 19 2.6 2.6 2.6 1 3.1 3.1 3.1
1986 7.4 7.4 7.4
2016 3.0 3.4 4.0 5
2017 60 6.5 33 6.8 14 2.6 3.2 3.9 3 3.2 3.2 3.2

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
60 7.8 29 6.8 16 2.3 3 4 3.5 3.1 4.6 7.4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2017-08-21
Depth (m) TEMP DO
0 23 8.7
1 22 8.6
2 21 8.6
3 21 8.5
4 21 8.4
5 21 8.3
6 21 7.8
7 21 7.8
8 21 7.8

Most recent temperature and dissolved oxygen profile plots

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