Mississippi River upstream of MN-15 Bridge at Sauk Rapids, MN (Agency code: UM-930) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P       TSS        Cl
Total obs. =       142       178       238       226       241        79
Start date =  02/12/79  08/25/76  09/08/60  05/21/58  01/28/53  03/09/53
End date   =  09/07/94  07/21/98  07/21/98  09/30/96  09/30/96  09/28/77
Mx smp int days=   161       418      2824      2824      2824      2824
Mean samp int=    40.3      45.2      58.4      62.3      66.5       115
Stdv samp int=    24.2      51.9       188       202       211       401
Mean conc. =      1.05      0.16     0.134     0.097      12.8       4.7
Stdev conc.=      0.25      0.15     0.087     0.094      23.4       3.1
Min conc.  =      0.54      0.01     0.020     0.010       0.5       0.5
25% conc.  =      0.89      0.05     0.070     0.054       5.0       3.0
Med. conc. =      1.03      0.11     0.120     0.077       9.0       4.0
75% conc.  =      1.19      0.26     0.200     0.104      15.0       6.0
Max conc.  =      1.91      0.65     0.580     0.985     330.0      20.0

Flow summaries are in the LOADEST2 diagnostic information

TN_N    = Total Nitrogen (as N)
          (Total Kjeldahl Nitrogen + Nitrate + Nitrite)
NOx_N   = Nitrate + Nitrite (as N)
NHx_N   = Total Ammonia (as N)
TP_P    = Total Phosphorus (as P)
TSS     = Total Suspended Solids
Cl      = Total Chloride (as Cl)