Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
NORTHPORT WALDO 14 1 2.89 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
4 m
(13 ft) 		2 m
(6 ft) 		44 ha
(109 ac) 		799,622 m3
(648 ac-ft) 		3 km2
(1.3 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
1984 5 13 3.5 4.1 5.2 5 1 4.8 4.8 4.8
1988 3.4 3.4 3.4 1
1992 5 30 7.1 9 4.1 4.1 4.1 1 1

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 30 7.1 11 3.4 3.9 5.2 2.3 4.8 4.8 4.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1984-08-20
1992-09-18
Depth (m) TEMP DO TEMP DO
0 22 7.7 21 8.6
1 22 7.6 21 8.6
2 22 7.6 20 8.4
3 22 7.5 19 8.1
4 19 7.0

Recent temperature and dissolved oxygen profile plots

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