Mississippi River at MN-24 bridge near Clearwater, MN (Agency code: UM-914) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P       TSS        Cl
Total obs. =        82       130       226       208       208       109
Start date =  02/12/79  08/25/76  07/20/67  07/20/67  07/20/67  07/20/67
End date   =  09/28/87  07/21/98  07/21/98  09/28/87  09/28/87  09/28/77
Mx smp int days=   119      2954      2954       129       129       129
Mean samp int=    38.9      62.0      50.3      35.6      35.6      34.5
Stdv samp int=    21.0       259       197      17.8      17.8      16.9
Mean conc. =      1.25      0.28     0.177     0.124      12.5       5.5
Stdev conc.=      0.70      0.48     0.122     0.284      24.6       3.2
Min conc.  =      0.60      0.01     0.020     0.005       0.5       0.7
25% conc.  =      0.99      0.10     0.100     0.070       4.0       4.0
Med. conc. =      1.14      0.19     0.200     0.090      10.0       5.0
75% conc.  =      1.31      0.35     0.200     0.120      14.0       7.0
Max conc.  =      6.27      4.80     0.990     4.000     270.0      27.0

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)