Mississippi River at Royalton, MN (Agency code: 05267000)

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P     SRP_P       TSS        Cl   SiO2_Si
Total obs. =       132       133        89       135        69       119       134       134
Start date =  01/22/75  01/22/75  10/31/79  01/22/75  12/09/81  01/28/75  01/22/75  01/22/75
End date   =  03/16/95  03/16/95  03/16/95  03/16/95  03/16/95  08/24/94  03/16/95  03/16/95
Mx smp int days=   250       250       250       250       250       348       291       291
Mean samp int=    56.2      55.7      63.8      54.9      71.3      60.6      55.3      55.3
Stdv samp int=    32.9      32.2      34.8      30.8      36.2      45.8      33.0      33.0
Mean conc. =      0.99      0.18     0.061     0.047     0.014      14.0       4.3      4.15
Stdev conc.=      0.56      0.12     0.060     0.038     0.015      14.0       1.9      1.12
Min conc.  =      0.15      0.00     0.000     0.010     0.010       1.0       1.5      1.12
25% conc.  =      0.72      0.10     0.020     0.030     0.010       5.0       3.5      3.46
Med. conc. =      0.87      0.15     0.040     0.040     0.010       9.0       4.0      4.39
75% conc.  =      1.10      0.27     0.090     0.060     0.020      20.0       4.9      5.14
Max conc.  =      4.30      0.61     0.450     0.340     0.130      91.0      20.0      6.54

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))