Illinois River near confluence with the Mississippi River (Agency code: I007.0W) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       134       138       137       126       138       137       137       136
Start date =  06/12/91  06/12/91  06/12/91  06/12/91  06/12/91  06/12/91  06/12/91  06/12/91
End date   =  04/20/98  04/20/98  04/20/98  04/20/98  04/20/98  04/20/98  04/20/98  04/20/98
Mx smp int days=    90       148       148        90       148        84        95       148
Mean samp int=    18.8      18.3      18.4      20.0      18.3      18.4      18.4      18.5
Stdv samp int=    12.6      14.5      15.0      15.0      14.6      11.5      12.5      15.2
Mean conc. =      5.14      3.72     0.121     0.287     0.138      80.0      55.5      2.49
Stdev conc.=      2.68      1.69     0.149     0.124     0.320      71.2      19.4      1.16
Min conc.  =      2.06      0.01     0.001     0.078     0.001       6.2      19.6      0.01
25% conc.  =      3.24      2.35     0.040     0.221     0.075      39.3      39.7      1.82
Med. conc. =      4.88      3.58     0.079     0.262     0.108      58.8      56.0      2.52
75% conc.  =      6.02      4.90     0.137     0.336     0.143      95.2      69.3      3.30
Max conc.  =     19.30     10.08     0.866     0.940     3.820     491.5     116.4      5.03

Flow summaries are in the LOADEST2 diagnostic information

TN_N    = Total Nitrogen (as N)
NOx_N   = Total Nitrate + Nitrite (as N)
NHx_N   = Dissolved Ammonia (as N)
TP_P    = Total Phosphorus (as P)
SRP_P   = Soluble Reactive Phosphorus (as P)
TSS     = Total Suspended Solids
Cl      = Dissolved Chloride (as Cl)
SiO2_Si = Dissolved Silicon (as Si)