Mississippi River downstream from Lock & Dam 12 (Agency code: M556.4A) 

Desriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       129       132       132       121        94       129       130       130
Start date =  05/07/93  05/07/93  05/07/93  05/07/93  05/07/93  05/07/93  05/07/93  05/07/93
End date   =  06/17/98  06/17/98  06/17/98  06/17/98  06/17/98  06/17/98  06/17/98  06/17/98
Mx smp int days=    42        22        22        81       371        56        27        27
Mean samp int=    14.6      14.3      14.3      15.6      20.1      14.6      14.5      14.5
Stdv samp int=     3.5       2.1       2.1       7.4      38.0       4.3       2.7       2.7
Mean conc. =      2.30      1.52     0.119     0.154     0.037      27.2      14.6      4.31
Stdev conc.=      0.73      0.72     0.099     0.092     0.028      19.6       3.3      1.88
Min conc.  =      0.70      0.01     0.001     0.010     0.001       1.5       8.8      0.01
25% conc.  =      1.83      0.98     0.056     0.092     0.014      11.1      12.5      3.27
Med. conc. =      2.29      1.58     0.089     0.136     0.035      24.7      14.0      4.67
75% conc.  =      2.67      1.94     0.156     0.185     0.055      40.6      16.1      5.73
Max conc.  =      4.57      3.97     0.581     0.748     0.129     101.1      26.5      7.66

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)