Chromium (Cr (VI) and methylene blue (MB) released from industry lead to a significant environmental pollution and have a tendency to accumulate in a certain part of the human body and become harmful to life. In this study water hyacinth leaf were used for the preparation of activated carbon to use it as an adsorbent for the removal of chromium (Cr (VI) and methylene blue (MB) from Tannery and Textile wastewater. The water hyacinth was collected from the coastal of Abay River. The waste samples were taken from pre-treatment & post-treatment sites outlet of leather & textile industry from Bahir Dar leather & textile production which are found in Bahir Dar City, Ethiopia. The activated carbon derived from the water hyacinth leaf (ACDWHL) were characterized through proximate analysis, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) & Brunauer Emmett and Teller (BET) analysis. The batch adsorption experiments were conducted by varying pH:1–8 & 6-14, dosage:50-250 mg/50ml, initial concentration:2–10ppm and contact time: 30-180 min, at room temperature for Cr (VI) and MB respectively. The optimum values are pH = 2 & 10, dose = 150 & 200 mg, concentration = 2 ppm and contact time = 120 & 90 min were obtained for Cr (VI) and MB removal, respectively. After carbonization, the carbon derived material from the water hyacinth leaf shows high- surface area of 616.387 m2 g -1 , pore volume of 0.2064 cm3 g -1 and pore diameter of 0.2261 nm was obtained at 2:1 impregnation ratio with 500°C temperature for 2hr of carbonization time. At the optimized pH the removal efficiency of ACDWHL for Cr (VI) and MB were 84.4 & 95.2%, respectively. In addition, the maximum adsorption capacity of Cr (VI) and MB was determined to be 7.4 and 8.12 mg g −1 , respectively. Electrostatic interaction acting a major role during these adsorptions due, to anionic species of Cr (VI) and cationic forms of MB. The conducted adsorption isotherm and the adsorption kinetic studies explained that data fitted well with Langmuir & Freundlich isotherm for Cr (VI) & MB respectively, and correlated well with the pseudo second order. Finally, its concluded that ACDWHL was a satisfactory adsorbent for mitigation of Cr (VI) and MB from tannery & textile industries effluent.