Mississippi River at Minneapolis Waterworks intake at Fridley, MN (Agency code: UM-859)

Descriptive Statistics of Concentration Data (Milligrams/Liter) 

                  TN_N     NOx_N     NHx_N      TP_P       TSS        Cl
Total obs. =       144       193       268       250       265        96
Start date =  02/28/79  08/05/76  06/28/67  06/28/67  01/28/53  04/16/53
End date   =  09/07/94  06/15/98  06/15/98  09/07/94  09/07/94  09/22/77
Mx smp int days=   182       418       764       764      3954      3954
Mean samp int=    39.7      41.6      42.4      39.9      57.6      93.9
Stdv samp int=    24.1      43.5      60.7      53.4       248       415
Mean conc. =      1.51      0.39     0.164     0.120      16.8       8.6
Stdev conc.=      0.43      0.33     0.124     0.057      12.7       4.9
Min conc.  =      0.84      0.01     0.020     0.010       0.5       0.5
25% conc.  =      1.22      0.15     0.080     0.084       8.0       5.5
Med. conc. =      1.44      0.32     0.195     0.113      16.0       8.0
75% conc.  =      1.67      0.59     0.200     0.150      23.0      10.0
Max conc.  =      3.92      2.22     1.200     0.480     120.0      28.0

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)