Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
NEWPORT PENOBSCOT 22 1 1.46 flushes/yr 200 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
18 m
(60 ft) 		6 m
(21 ft) 		1,734 ha
(4,285 ac) 		110,600,000 m3
(89,665 ac-ft) 		116 km2
(45 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
1972 28 137 32 44 72
1974 0.80 1.7 2.1 2
1975 0.80 2.7 5.0 7
1977 25.1 25.1 25.1
1978 61 243 0.70 1.0 1.6 4 35.1 62.6 93.3
1979 30 118 277 1.10 1.7 2.9 8 15.2 30.1 53.7
1980 41 177 184 0.60 1.8 4.1 9 2.5 37.8 82.0
1981 23 160 150 1.20 2.4 3.7 10 7.3 28.5 43.9
1982 124 123 0.90 1.4 2.7 6 7.3 33.3 65.9
1983 39 56 324 0.50 1.8 3.8 8 4.4 43.4 68.1
1984 173 0.60 1.7 3.9 6 5.5 40.9 88.4
1985 35 91 74 0.70 1.7 3.7 7 6.0 38.0 85.7
1986 50 0.80 1.9 3.1 8 7.4 30.7 61.5
1987 49 0.80 1.9 3.3 7 9.1 36.6 55.1
1988 80 1.70 2.9 3.9 4 13.3 19.5 25.7
1989 114 0.90 2.3 4.7 5 6.0 30.2 54.5
1990 78 1.30 1.8 2.8 3 49.2 49.2 49.2
1991 39 1.00 1.6 2.5 4
1992 59 0.30 1.1 2.1 4
1993 50 1.20 2.4 4.2 4
1994 49 1.00 2.5 4.4 4
1995 74 1.90 2.9 4.4 4
1996 53 1.20 2.5 3.9 4
1997 34 64 32 2.00 3.0 3.8 4
1998 34 115 78 1.40 1.8 2.1 3
1999 12 37 0.85 1.6 2.3 5 13.1 17.4 21.7
2000 35 105 28 35 43 1.00 2.4 3.3 7 7.3 24.9 53.0
2001 39 109 7.8 18 31 1.07 2.7 5.2 9 7.0 12.0 16.0
2002 27.0 39 117 25 82 42 1.40 2.1 3.2 6 28.0 31.3 36.2
2003 9.5 40 129 20 28 1.50 2.6 3.8 8 12.4 16.0 22.2
2004 17.0 36 134 24 25 1.40 2.5 3.4 10 15.1 17.2 19.3
2005 18.0 39 113 8.1 13 25 20 2.35 3.0 3.9 7 8.9 9.1 9.2
2006 29 1.95 2.8 4.0 8
2007 43 1.50 2.8 4.6 8
2008 20 38 1.90 2.7 3.5 9 17.3 17.3 17.3
2009 18 26 44 1.40 2.4 3.2 9 3.0 13.3 25.0
2010 33 34 1.70 2.8 3.9 8 14.0 20.0 31.0
2011 22 63 1.65 2.7 3.3 6 14.0 19.5 25.0
2012 11.0 44 126 7.3 24 62 2.00 2.9 3.6 7 13.0 13.0 13.0
2013 64 1.80 3.0 4.7 7 9.4 13.7 18.0
2014 12.0 46 111 7.7 47 16 31 2.01 2.8 4.0 9 9.8 16.7 23.0
2015 8.5 43 104 8.2 14 52 2.10 2.8 3.6 6 2.8 9.3 16.0
2016 11.0 45 128 7.7 21 44 29 1.90 2.5 3.1 10 5.4 10.1 14.0
2017 19 27 2.20 3.0 4.5 4 5.5 11.3 16.0
2018 8.0 42 113 7.7 24 55 1.60 2.2 2.7 3 9.0 15.0 20.0

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
14 38 116 7.7 25 24 43 77 0.3 2.3 5.2 6.3 2.5 25 93

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-09-06
2016-09-13
2017-08-03
2017-08-11
2017-08-15
2017-09-14
2018-08-17
2018-08-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 8.8 22 8.1 26 8.7 23 8.1 23 8.1 21 9.6 25 7.7 24 7.5
1 23 8.8 22 8.1 25 8.7 23 8.1 23 8.1 21 9.7 25 7.3 24 7.5
2 23 8.8 22 8.0 25 8.7 23 8.1 23 7.9 20 9.7 25 6.5 24 7.2
3 22 8.4 22 8.0 25 8.6 23 8.0 23 7.6 20 9.6 25 5.3 24 6.7
4 22 7.9 22 7.9 25 8.6 23 7.0 23 7.6 20 9.5 24 4.5 23 6.5
5 22 8.0 22 7.9 23 7.7 23 7.1 23 7.6 20 9.2 24 3.8 23 6.4
6 23 7.8 22 7.9 22 3.3 22 6.9 23 7.4 19 9.0 24 3.4 23 6.4
7 22 7.3 22 7.8 20 0.3 21 1.1 23 7.2 19 9.0 24 3.3 23 6.0
8 22 5.8 22 7.8 20 0.2 21 0.2 23 6.7 19 8.3 22 1.0 23 5.6
9 22 4.3 22 7.7 19 0.2 20 0.2 22 4.6 19 8.0 21 0.3 21 0.3
10 22 3.8 22 7.7 18 0.2 18 0.2 19 0.3 19 7.3 20 0.2 20 0.3
11 21 1.0 22 5.9 17 0.2 16 0.2 17 0.2 19 7.4 18 0.2 19 0.3
12 16 0.2 19 0.8 15 0.2 15 0.2 15 0.2 19 6.9 16 0.2 16 0.3
13 14 0.2 14 0.5 13 0.2 13 0.2 14 0.2 15 0.5 14 0.2 15 0.4
14 13 0.2 14 0.5 12 0.2 13 0.2 12 0.3 12 0.2 12 0.4
15 12 0.2 13 0.5 12 0.2 12 0.2 11 0.2 12 0.4
16 12 0.2 12 0.4 10 0.2
17 12 0.2 10 0.2

Most recent temperature and dissolved oxygen profile plots

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