DISSOLVED AMMONIA PLUS ORGANIC

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 N. For details about the data, press here.

The highest reading, 1.2, occurred in 5/95, and the lowest, <.2, in 8/88. All of the readings above .5 (12 percent of the samples), are shown in red and all that are below <.2 (another 36 percent), are in blue.

 Averages by
Season and by
5-year Period:
 
(Overall = 0.263)
Jan-Mar0.196
Apr-Jun 0.286
Jul-Sep 0.309
Oct-Dec 0.221
1980-84 0.000
1985-89 0.362
1990-94 0.215
1995-99 0.235

YearJanFebMar AprMayJunJulAug SepOctNovDec
1988       .3
.5		 .4
.6		 .3
.3		 .3
.9		 .4
<.2		 .5 .3
.3		    
1989 .5 .3
.3		 <.2
.3		 .4
.2		 .3
.6		 .3
.3		 .6
.5		 .7
.3		 .4
.5		      
1990   <.2
.4		 .4
<.2		 <.2
.2		 <.2
.2		 <.2
.6		 .6
.4		 .5
.3		 .5
.5		 .6
.4		 .3
.3		 .2
<.2
1991                        
1992                        
1993   <.2 <.2
<.2
<.2		 <.2
<.2
.2
.2		 .2
<.2
.3
<.2		 .4
<.2
.2
.3
.2		 .2
.2
<.2
<.2		 <.2
<.2
<.2		 .3
.3
<.2
<.2
.2		 <.2
<.2
<.2
.2		 .2
.2		 <.2
.3
1994 .3 <.2
<.2
<.2		 .2
<.2
<.2		 <.2
<.2
<.2
.2		 <.2
.2
.2
.2
<.2		 .2
<.2
.4		 .3
.2
.4
.3		 .3
.2
.2
.2
.3
.2		 <.2 <0.2 <0.2 <0.2
1995 <0.2 <0.2 <0.2 <0.2 1.2 .3 .3
<0.2		 .2 <0.2 .3    
1996 .3 <0.2   .2   .5 .3 .2 .3 .3   .2
1997   .2   <.2 <.2 <.2   .28 .2