St. Croix River near confluence with Mississippi River (Agency code: SC 00.3) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl
Total obs. =       358       567       859       603       374       573        45
Start date =  01/06/76  01/06/76  01/06/76  01/06/76  03/17/77  01/06/76  05/06/92
End date   =  12/18/96  12/18/96  12/18/96  12/18/96  12/18/96  12/18/96  12/18/96
Mx smp int days=   312        70        57        56        84        56       100
Mean samp int=    21.4      13.5       8.9      12.7      19.3      13.4      38.3
Stdv samp int=    20.9       5.7       4.5       5.7      10.3       5.6      37.8
Mean conc. =      1.12      0.52     0.116     0.057     0.049       5.4       4.4
Stdev conc.=      0.35      0.34     0.118     0.077     0.171       5.4       1.2
Min conc.  =      0.22      0.02     0.010     0.010     0.000       1.0       1.1
25% conc.  =      0.90      0.29     0.040     0.030     0.010       2.0       4.0
Med. conc. =      1.09      0.45     0.080     0.040     0.020       4.0       4.0
75% conc.  =      1.25      0.66     0.140     0.060     0.032       6.0       5.0
Max conc.  =      3.36      2.71     0.900     0.800     2.190      75.0       7.0

Flow summaries are in the LOADEST2 diagnostic information

TN_N    = Total Nitrogen (as N)
          (Total Kjeldahl Nitrogen + Nitrate + Nitrite)
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 Orthophosphate) 
TSS     = Total Suspended Solids
Cl      = Dissolved Chloride (as Cl)