Big Muddy River at Murphysboro, IL (Agency code: 05599500) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       177       182        88       182        64       241       181       151
Start date =  11/11/74  11/11/74  10/23/79  11/11/74  11/23/81  05/06/75  11/11/74  11/11/74
End date   =  02/16/93  02/16/93  07/13/92  02/16/93  07/13/92  08/17/92  02/16/93  07/13/92
Mx smp int days=   168       104       126        92       126       133        92       100
Mean samp int=    37.9      36.9      53.4      36.9      61.7      26.3      37.1      43.0
Stdv samp int=    16.3      14.1      24.3      13.2      22.0      21.7      15.8      21.8
Mean conc. =      1.54      0.51     0.169     0.216     0.066     173.7      32.0      2.18
Stdev conc.=      0.62      0.50     0.188     0.088     0.047     294.3      17.9      0.85
Min conc.  =      0.54      0.01     0.010     0.010     0.000       5.0       1.7      0.51
25% conc.  =      1.20      0.27     0.070     0.155     0.035      55.0      19.0      1.59
Med. conc. =      1.40      0.44     0.120     0.210     0.050     100.0      31.0      2.20
75% conc.  =      1.80      0.66     0.220     0.260     0.080     168.0      42.5      2.80
Max conc.  =      7.05      6.07     1.400     0.550     0.220      2560     140.0      5.14

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)
          (measured as Dissolved Orthophosphate) 
TSS     = Total Suspended Solids
Cl      = Dissolved Chloride (as Cl)
SiO2_Si = Dissolved Silicon (as Si)
          (Converted from original concentrations measured 
           as Dissolved Silica (as SiO2))