Mississippi River upstream from Lock & Dam 14 (Agency code: M497.2B)

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       128       131       131       120        92       128       129       129
Start date =  06/03/93  05/19/93  05/19/93  06/03/93  05/19/93  07/01/93  05/19/93  05/19/93
End date   =  06/18/98  06/18/98  06/18/98  06/18/98  06/18/98  06/18/98  06/18/98  06/18/98
Mx smp int days=    39        22        22        84       381        22        29        29
Mean samp int=    14.5      14.3      14.3      15.5      20.4      14.3      14.5      14.5
Stdv samp int=     2.7       1.6       1.6       8.1      39.4       1.7       2.4       2.4
Mean conc. =      3.04      2.41     0.122     0.167     0.042      38.7      15.7      4.10
Stdev conc.=      1.23      1.47     0.123     0.094     0.040      49.2       3.4      1.63
Min conc.  =      0.84      0.19     0.001     0.012     0.001       0.3       8.0      0.14
25% conc.  =      2.17      1.44     0.050     0.110     0.015      14.7      13.4      3.32
Med. conc. =      2.88      2.23     0.088     0.157     0.035      30.4      15.3      4.44
75% conc.  =      3.79      2.99     0.145     0.200     0.055      48.2      17.8      5.25
Max conc.  =      6.38      7.94     0.753     0.622     0.237     444.7      29.1      7.26

Flow summaries are in the LOADEST2 dignostic 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)