DISSOLVED CALCIUM

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 Ca. For details about the data, press here.

The highest reading, 33, occurred in 10/93, and the lowest, 4.4, in 8/93. All of the readings above 27 (14 percent of the samples), are shown in red and all that are below 17 (another 14 percent), are in blue.

 Averages by
Season and by
5-year Period:
 
(Overall = 22.2)
Jan-Mar20.9
Apr-Jun 21.2
Jul-Sep 23.5
Oct-Dec 22.8
1980-84 20.7
1985-89 23.0
1990-94 21.7
1995-99 21.8

YearJanFebMar AprMayJunJulAug SepOctNovDec
1980                   29    
1981 32     22     24     27    
1982 22     21     26       28  
1983 12       20   22       19  
1984 19     11 18 21 15 21 18 21 20 20
1985 22     22 23 22 23 23 23 25 18 22
1986 24   22 21 24 24 24 25 24 28 29 22
1987 21   19 22 23 25 25 25 25 24 25 20
1988 21   21 25 25 26 26 30 22 28 27 24
1989     23 18 17 17   25 24 19 21 23
1990 24   23 18 15 15 22 17 26 10 19 17
1991 22   18 24   23 26 28 27 27 30 21
1992 23   21 20 25 19 24 22 22 24   20
1993   23 18
13
13		 18
18
16
18		 18
21
22
24		 23
24
25
26
23		 26
26
24
23		 23
4.4		 24
24
23
21
22		 26
22
32
33		 26
30		 17
16
1994 23 12
22		 14
17
12		 17
20
24
20		 22
23
17
20
23		 24
17
21
24		 25
28
25
29		 23
23
27
28
19
23		 27 28 28 18
1995 16 23 19 25 26 22 25
22		 27 15 24    
1996 27 22   19   23 27 30 21 16   14
1997   17   17 19 28 19 23 25