Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
NORTH BERWICK YORK 2 1 8.77 flushes/yr 205 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
9 m
(29 ft) 		3 m
(10 ft) 		76 ha
(188 ac) 		2,416,279 m3
(1,959 ac-ft) 		38 km2
(15 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
1986 27 2.1 2.8 3.3 2 6.6 8.4 14

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
27 2.1 2.8 3.3 2 6.6 8.4 14

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1986-08-04
1986-08-07
1986-08-11
1986-08-14
1986-08-18
1986-08-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.2 24 8.1 26 8.5 25 9.1 24 7.7 21 8.5
1 24 8.2 24 8.0 25 8.3 24 8.8 24 7.5 21 8.4
2 23 7.1 24 7.9 24 8.2 23 7.8 22 7.4 21 8.2
3 22 6.7 21 4.1 22 4.5 23 7.3 22 5.9 21 8.2
4 18 0.2 17 0.3 18 0.2 18 0.5 18 0.6 19 2.6
5 14 0.2 13 0.2 16 0.1 14 0.5 16 0.4 14 0.4
6 14 0.4 13 0.1

Most recent temperature and dissolved oxygen profile plots

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