Concentrations File Formation Information

Field Name       Description
SITECODE         Arbitrary site code based on the pool of the Upper Mississippi River that the tributary enters
AGENCY CODE      Sitecode used by state, federal or local agency
DATE             Date site was sampled
DISCHARGE (cfs)  mean daily discharge in cubic feet per second
TN_N (mg/l)      Instantaneous concentration of total nitrogen in mg/L
ORGANIC N        Instantaneous concentration of organic nitrogen in mg/L
NOX_N            Instantaneous concentration of nitrate plus nitrite in mg/L
NHX_N            Instantaneous concentration of dissolved ammonia in mg/L
TKN              Instantaneous concentration of total kjeldahl nitrogen in mg/L
TP_P             Instantaneous concentration of total phosphorus in mg/L
SRP_P            Instantaneous concentration of soluble reactive phosphorus in mg/L
TSS              Instantaneous concentration of total suspended solids in mg/L
CL               Instantaneous concentration of dissolved chloride in mg/L
SIO2_SI          Instantaneous concentration of dissolved silicon in mg/L
K                Instantaneous concentration of dissolved potassium in mg/L

*If date had more than one sample, the mean concentration for that day was reported in these files.