DISSOLVED OXYGEN SATURATION

The measurements shown below were made at USGS station 01209710, located on the Norwalk River near the Perry Avenue bridge. All of the measurements are in percent. For details about the data, press here.

The highest reading, 158.4, occurred in 7/94, and the lowest, 72.8, in 1/90. All of the readings above 125.31 (10 percent of the samples), are shown in red and all that are below 96.11 (another 10 percent), are in blue.

 Averages by
Season and by
5-year Period:
 
(Overall = 109)
Jan-Mar105
Apr-Jun 108
Jul-Sep 117
Oct-Dec 107
1980-84 108
1985-89 111
1990-94 110
1995-99 105

YearJanFebMar AprMayJunJulAug SepOctNovDec
1980                   110 98 78
1981 98 102 108 102 100 90 145 111 121 98 115 120
1982 103 73 104 120 127 93 110 90 114 136 114 113
1983 106   105 102 109.46 112.25 124.73 98.88 149.42 102.68 104.71 102.25
104.23
1984 114.16   109.19 113.29 102.03 108.54 108.53 102 101 100 105.63 106
1985 123   102.39 114.45 97 103.19 128.3
128.26		 113.67 114 109 106 107
1986 112   114 88 103 105 125 135 111 133 104 99
1987 104   101 106 104 111 105 141 133 129 96 99
1988 102   107 108
117		 103
105		 116.71
129.55		 117.91
117		 146.41
153.41		 118.04 131.91
123.55		 105.22 103
1989 116.41 112.59
103.12		 120.06
114.81		 113.84
125		 101.92
86.6		 100.02
109.41		 108.08
115.29		 107.18
142.53		 124.48
92.78		 95.4 99.25 105.84
1990 96.28
72.8		 103.7
114.81		 111.56
104.2		 112.65
117.31		 115.73
102.78		 110.68
106.38		 111.81
107.05		 100.03
121.65		 112.54
121.65		 117.65
101		 118.92
106.29		 109.24
101.48
1991 109.39   98.44 112.12   115.93 143.24 127.22 124.51 106.66 105.39 102.94
1992 111.16   113.65 110.39 133.38 105.35 98.97 102.1 155.61 110.85
103.45		   102.86
1993   110.61 101.48
105.38		 99.24
99.52
98.18
112.3		 100.03
97.09
101.92
96.88		 96.11
109.13
110.91
105.72
119.09		 106.21
105.79
118.86		 108.48
123.21
118.82		 90.51
112.64
112.69
94.37
93.03		 92.49
94.86
131.54
109.79		 101.61
106.61		 99.24
106.62
1994 105.68 105.64
100.76		 108.74
114.55
100.03		 100.04
95.73
106.34
111.37		 92.63
107.73
96.25
112.67
136.22		 103.5
116.67
93.64
86.99
110.63		 158.4
120.05
129.47
125.31		 127.63
110.68
110.91
112.81
98.92
116.88		 100.04 115 116 102
1995 103 101 100 108 115 102 120
116		 140 101 105    
1996 99 107   108   95 95 112 102 99   105
1997   106   111 120
112		 113 103
103
100		 102
102
114		 92
92
94
94
97