DISSOLVED BICARBONATE WATER

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 milligrams per liter HCO3. For details about the data, press here.

The highest reading, 100, occurred in 11/91, and the lowest, 37, in 3/93. All of the readings above 88 (10 percent of the samples), are shown in red and all that are below 51 (another 12 percent), are in blue.

 Averages by
Season and by
5-year Period:
 
(Overall = 68.9)
Jan-Mar62.4
Apr-Jun 66.4
Jul-Sep 73.2
Oct-Dec 72.5
1980-84 0.000
1985-89 0.000
1990-94 73.0
1995-99 64.1

YearJanFebMar AprMayJunJulAug SepOctNovDec
1991                   97 100 69
1992 81   59 68 81 62 77 77 72 91   71
1993   73 58
37
73.4		 51
70
52
55		 80.2
77.6
77
75.4		 79.6
76.9
76
76
85.9		 73.9
73
78
65.6		 73
76.9		 75.4
62
75.4		 75.4
83.6
79
84		 75
61.7		 63.1
1994 60.2 63.2 69.3
44.9		 44
57.6
52
58.8		 66.1
71
50
65.6
72.9		 72
72.7
61.4
90		 82.7
93
84.9
77.8		 90
83.7
88
97.3
66.6
78		 91 84   58
1995 51 69 70 78 69 53 69
55		 70 43 67    
1996 71 52   51   65 80 92 76 49   44
1997   49   51 59
70		 81 55 65 71