This  study  was  carried  out  to  assess  the  impact  of  industrial  effluents  on  water  quality  of River  Kaduna  at Kudenden  Industrial  Area,  Kaduna  State.  W ater  samples  were collected  at  upstream  and  downstream  and  from discharge  outlets  of  the  industries located  within the  area. Physicochemical and microbiological parameters of the  water samples were analyzed and compared with the Environmental Protection Agency and Nigerian  Standard  for  discharge  into natural  waters.  The  concentration  of  the parameters  analyzed  recorded    electrical  conductivity  concentration  values, as 3340 S/cm,  4970  S/cm,  2290  S/cm,  and  2730  S/cmwere  above  the  standard  specified  for discharged  into natural waters. All  samples  analyzed  for  chloride (78.98  -  562.33) mg/L, total alkalinity (20 - 180) mg/Land total suspended solids (214 - 672) mg/L were within the permissible limit. T urbidity     values recorded are87.1 NTU, 89.2 NTU, 97.8 NTU,  and 132.1  NTU  were  not  within  the  standard  limit,  so  also  the   total  hardness  (220 -  870)  mg/L were  not  within  the standard  limit.  There  was  general  incr easein  the concentration of salt fr om the industries into the river resulting in high salinity of 757mg/L as obtained in the downstream. Iron and nitrate concentration values are within the  permissible  limit  of 0.3  mg/L with  the  exception  of  the  effluent  from  Industrial upstream with 0.28 and Industry A with 29 mg/L nitrate. In the case of feacal coliform content, all samples were above the  permissible limit  of 0-5 cfu/100mL. For the  total dissolved solids,  all  samples  fell  within  the  limit  specified  with  the  exception  of  that  from the  Industry  B. The concentrations of  the  parameters  analyzed  at  the  industrial  effluent discharge  outlet  points,  were  classified  as  poor  due  to  high degree  of  pollution. Generally, the concentrations of parameters at effluent discharge points were greater than industries upstream and downstream, signifying impacts of the effluent discharge on  water  quality .  The  low  downstream concentration  may  probably  be  due  to  the consequence  of  self-purification  by  the  river.

KEYWORDS:  Effluent  discharge,  industries,  natural  water  bodies,  pollution,  water quality ,  wastewater