DISSOLVED SODIUM

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, as NA. For details about the data, press here.

The highest reading, 40, occurred in 1/96, and the lowest, 2.0, in 2/94. All of the readings above 24 (11 percent of the samples), are shown in red and all that are below 15 (another 10 percent), are in blue.

 Averages by
Season and by
5-year Period:
 
(Overall = 20.1)
Jan-Mar22.2
Apr-Jun 19.2
Jul-Sep 20.1
Oct-Dec 19.4
1980-84 0.000
1985-89 0.000
1990-94 19.6
1995-99 21.2

YearJanFebMar AprMayJunJulAug SepOctNovDec
1991                   22 19 17
1992 19   21 17 20 17 20 17 19 20   19
1993   20 33
16
15		 17
17
15
17		 16
18
18
19		 19
20
21
21
19		 20
20
23
21		 21
9.1		 24
23
20
18
18		 21
18
25
26		 21
24		 15
31
1994 22 2.0
23		 20
20
16		 17
19
18
19		 20
20
16
19
20		 21
15
18
19		 22
23
21
19		 18
19
21
20
15
19		 22 22 21 15
1995 17 20 17 21 24 20 22
19		 23 13 20    
1996 40 38   21   21 24 26 18 15   14
1997   22   18 19 19 16 22 24