Mississippi River at Shiely Co. Dock, Grey Cloud Island, MN (Agency code: UM-826) 

Descriptive Statistics of Concentration Data (Milligrams/Liter)

                  TN_N     NOx_N     NHx_N      TP_P       TSS        Cl
Total obs. =       263       280       280       263       263        68
Start date =  03/07/75  03/07/75  03/07/75  03/07/75  03/07/75  03/07/75
End date   =  09/15/94  06/15/98  06/15/98  02/11/98  02/11/98  05/22/80
Mx smp int days=   154       406       406      1245      1245        98
Mean samp int=    27.2      30.5      30.5      32.0      32.0      28.4
Stdv samp int=    20.9      38.1      38.1      78.1      78.1      26.2
Mean conc. =      3.97      2.05     0.690     0.313      35.7      29.9
Stdev conc.=      1.95      1.92     0.659     0.161      37.4      16.8
Min conc.  =      1.57      0.01     0.020     0.058       0.5      12.0
25% conc.  =      2.60      0.64     0.250     0.218      12.0      19.5
Med. conc. =      3.46      1.40     0.515     0.270      26.0      24.0
75% conc.  =      4.87      2.75     0.890     0.343      49.0      36.0
Max conc.  =     13.07     11.10     3.700     1.160     340.0     100.0

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)