Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
LYMAN YORK 2 1 0.56 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(43 ft) 		6 m
(18 ft) 		116 ha
(287 ac) 		6,490,620 m3
(5,262 ac-ft) 		5 km2
(2 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
1974 3.0 3.4 3.7 2
1975 3.0 3.4 4.0 6
1976 18 35 17 2.7 3.7 4.6 4 10.1 10.1 10.1
1977 13 3.9 4.2 4.4 4
1978 4.0 4.1 4.3 4
1979 4.0 4.1 4.3 5
1980 8 31 10 73 3.4 3.9 5.1 5 4.7 4.7 4.7
1981 13 30 13 110 2.7 3.9 5.5 5 3.7 5.1 7.1
1982 3.0 3.5 4.0 4
1983 7 10 45 3.9 4.6 5.4 3 4.1 4.1 4.1
1984 3.0 3.0 3.0 1
1986 7 21 11 170 3.7 4.0 4.5 5
1987 2.7 3.6 4.5 5
1988 3.1 3.5 3.9 6
1989 3.0 3.6 4.0 5
1990 3.5 3.9 4.4 5
1991 18 28 6.9 9 4.0 4.0 4.0 1 6.3 6.3 6.3
1992 8 20 7.4 9 5.5 5.5 5.5 1 4.4 4.4 4.4
1999 4.6 5.0 5.9 7
2000 10 35 11 56 4.4 4.8 5.2 4 4.9 4.9 4.9
2001 5 34 7.0 11 18 4.2 5.1 5.6 5 8.3 8.3 8.3
2002 21 10 41 9 22 4.2 4.8 5.3 5 3.2 3.2 3.2
2003 4.3 4.8 5.2 4
2004 4.7 5.0 5.1 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
21 10 31 7 10 63 17 2.7 4.1 5.9 4.1 3.2 5.7 10

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1986-09-06
1986-09-10
1987-08-30
1991-09-04
1992-08-28
2000-08-25
2001-08-20
2002-08-21
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20.0 9 20 9.0 21.4 8.4 25 8.4 24 9.0 24.6 7.9 26 7.8
1 20 9.0 21.7 8.2 25 8.3 22 9.1 24.7 7.8 26 8.5
2 20 9.0 21.5 8.2 25 8.4 22 9.1 24.7 7.7 26 8.9
3 16.7 8 19 9.0 19.4 6 21.3 8.2 22 8.5 22 8.9 24.7 7.7 26 9.0
4 19 8.8 21.1 8.0 21 7.9 22 8.7 23.2 7.0 24 8.0
5 19 8.4 21.0 7.5 20 4.1 20 5.5 17.7 4.1 20 5.6
6 18 6.0 19.0 2.1 15 0.2 16 0.2 12.3 0.9 16 0.7
7 14 2.5 15.0 0.4 12 0.1 14 0.2 10.9 0.7 14 0.7
8 13 2.2 12.5 0.2 11 0.1 12 0.2 9.9 0.6 12 0.6
9 12 1.8 11.3 0.1 11 0.1 11 0.2 8.7 0.6 12 0.5
10 11 1.6 11.0 0.1 10 0.1 11 0.2 8.4 0.6 12 0.5
11 10 1.5 10.1 0.1 10 0.1 10 0.2 8.1 0.6 11 0.5
12 9.4 2 10 1.3 9.4 2 9.9 0.1 0 0.1 10 0.2 11 0.4
13 10 1.3 11 0.4

Recent temperature and dissolved oxygen profile plots

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