Sangamon River at Oakford, IL (Agency code: 05583000)

Descriptive Statistics of Concentration Data

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       149       136       114       151        85        87       157       122
Start date =  12/20/77  03/28/79  10/08/76  12/20/77  10/08/76  03/28/79  10/08/76  10/08/76
End date   =  05/10/94  05/10/94  05/10/94  05/10/94  05/10/94  02/10/94  05/10/94  05/10/94
Mx smp int days=   116       116       302       116      1444       526       112       173
Mean samp int=    40.4      40.9      56.8      39.9      76.5      63.2      41.2      53.1
Stdv samp int=    16.1      17.1      36.7      15.8       154      62.7      18.3      27.0
Mean conc. =      5.37      4.69     0.210     0.409     0.262     285.7      46.5      3.66
Stdev conc.=      3.09      2.81     0.359     0.265     0.291     598.3      29.9      0.96
Min conc.  =      0.31      0.02     0.000     0.130     0.030       6.0      12.0      1.08
25% conc.  =      2.70      2.08     0.021     0.220     0.120      42.0      28.0      3.09
Med. conc. =      5.50      5.00     0.070     0.325     0.160      94.0      36.0      3.76
75% conc.  =      8.00      7.15     0.233     0.510     0.230     252.0      56.0      4.35
Max conc.  =     16.00     12.00     1.940     1.500     1.600      4060     180.0      5.61

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))