Mississippi River at Lock and Dam 5 (Agency code: UM-738)

Descriptive Statistics of Concentration Data (Milligrams/Liter) 

                  TN_N     NOx_N     NHx_N      TP_P       TSS        Cl
Total obs. =       143       171       198       190       190        40
Start date =  02/08/79  08/02/76  05/21/74  05/21/74  05/21/74  05/21/74
End date   =  09/21/94  09/19/96  09/19/96  09/19/96  09/19/96  09/06/77
Mx smp int days=   175       399       399       650       650        56
Mean samp int=    40.2      43.3      41.4      43.2      43.2      30.9
Stdv samp int=    25.4      45.4      41.7      55.4      55.4       6.0
Mean conc. =      2.89      1.60     0.197     0.186      22.3      14.6
Stdev conc.=      1.34      1.25     0.187     0.068      18.4       4.6
Min conc.  =      0.60      0.01     0.020     0.068       1.0       6.0
25% conc.  =      1.91      0.59     0.080     0.141      11.0      11.5
Med. conc. =      2.57      1.30     0.140     0.174      18.5      14.0
75% conc.  =      3.52      2.20     0.220     0.221      29.0      17.0
Max conc.  =      7.08      5.70     1.200     0.490     150.0      24.0

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)