Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
HOLLIS YORK 2 1 0.43 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
20 m
(65 ft) 		6 m
(20 ft) 		11 ha
(27 ac) 		671,533 m3
(544 ac-ft) 		0 km2
(0.1 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

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
1979 4.3 36 31 4.9 4.9 4.9 1 2.3 2.3 2.3
1980 3.0 3.7 5.0 3
1981 4.5 4.5 4.5 1 2.6 2.6 2.6
1984 3.0 12 86 2.6 3.8 4.5 5 5.8 5.8 5.8
1997 4.5 34 6.3 6 39 4.8 5.1 5.3 1
2017 3.5 3.9 4.5 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
3.9 35 6.3 9 62 31 2.6 4.3 5.3 2.2 2.3 3.6 5.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1979-08-30
1984-09-14
1997-08-21
Depth (m) TEMP DO TEMP DO TEMP DO
0 23.0 8.6 20.5 8.5 22.5 8.6
1 23.0 8.6 20.5 8.8 22.5 8.6
2 21.0 8.5 20.2 8.4 22.5 8.6
3 18.0 8.3 16.0 3.9 18.1 14.6
4 12.0 6.0 11.9 3.2 11.1 15.3
5 8.0 3.8 8.5 3.0 7.1 7.1
6 6.5 3.0 7.1 3.2 5.1 3.2
7 5.0 3.0 6.1 3.2 4.9 3.1
8 4.5 3.2 5.8 3.5 4.7 3.3
9 4.0 2.8 5.1 3.6 4.2 3.5
10 4.0 2.1 5.0 3.5 4.1 3.6
11 4.0 0.7 4.9 3.1 4.1 3.6
12 4.9 2.7 4.1 3.2
13 4.0 0.6 4.9 2.3 4.1 3.2
14 4.9 1.1 4.1 2.5
15 4.0 0.5 4.8 0.1 4.1 1.2
16 4.1 0.3
17 4.0 0.5 4.1 0.2
18 4.0 0.5 4.1 0.1
19 4.1 0.1

Recent temperature and dissolved oxygen profile plots

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