Upper Iowa River at Hwy 26 bridge near confluence with Mississippi River (Agency code: UI02.9M) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =        70        74        74        61        69        74        66        68
Start date =  06/26/95  06/26/95  06/26/95  06/26/95  06/26/95  06/26/95  06/26/95  06/26/95
End date   =  05/05/98  05/05/98  05/05/98  05/05/98  04/24/98  05/05/98  04/24/98  04/24/98
Mx smp int days=    43        29        29        83        54        29        70        54
Mean samp int=    15.1      14.3      14.3      17.4      15.2      14.3      15.9      15.4
Stdv samp int=     5.1       3.0       3.0      11.5       5.8       3.0       8.5       6.2
Mean conc. =      3.67      3.56     0.048     0.092     0.016      31.5      12.1      4.31
Stdev conc.=      1.33      1.38     0.040     0.064     0.019      31.2       7.9      1.55
Min conc.  =      0.38      1.50     0.001     0.001     0.001       2.8       8.1      0.96
25% conc.  =      2.74      2.46     0.023     0.049     0.001       9.3       9.9      3.15
Med. conc. =      3.62      3.59     0.037     0.083     0.008      20.1      11.0      4.28
75% conc.  =      4.24      4.13     0.065     0.111     0.022      42.2      12.4      5.71
Max conc.  =      8.65      8.23     0.226     0.334     0.073     150.0      73.4      6.61

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)
TSS     = Total Suspended Solids
Cl      = Dissolved Chloride (as Cl)
SiO2_Si = Dissolved Silicon (as Si)