Subject area	Environment
More specific subject area	Chemical and biological oxygen demand
Type of data	Table, figure
How data was acquired	DR/5000 UV–vis HACH spectrophotometer
Data format	Raw, analyzed
Experimental factors	–For samples collection from different grey water of Ahvaz, a glass tank was used with a volume of 2–4 l, containing 3 electrode-plate iron and aluminum (Al-Al, Al-Fe, Fe-Fe) was used for Electrocoagulation removal. –After collection of wastewater along the car washes, added Sulfuric acid (H2SO4), potassium dichromate (K2Cr2O7), mercury sulfate (HgSO4), silver sulfate (Ag2SO4), potassium hydrogen phthalate (C8H5KO4) and 3-methyl-2-benzothiazoline, then it was stored in a dark place at 4 °C temperature until the metals analysis –The effects of contact times, initial pH, electrical potential and voltage were examined.
Experimental features	Electrocoagulation between many treatment processes having to be cost-effective for wastewater treatment with pollutant wide range.
Data source location	Ahvaz, Iran
Data accessibility	Data is with this article.