Abstract
Experimentation was carried out in Sahiwal, Sargodha, Pakistan to evaluate the contamination level in wheat variety (Millat-2011), irrigated with different treatments of household waste water in a Completely Randomized Design with three repetitions. There were five treatments viz. T1 (100% ground water), T2 (25% wastewater, 75% groundwater), T3 (50% wastewater, 50% ground water), T4 (75% wastewater, 25% ground water), T5 (100% wastewater). Analyzed parameters were heavy metal concentration in wheat and soil, metal correlation between food crop and soil, pollution load index, bioconcentration factor, health risk index, daily -intake of metals, and enrichment factor. Current results showed that concentration of heavy metals and metalloids in soil and grains increased due to supply of waste water. Cr, Cd, Ni, Fe, Mn, Cu and Zn showed significantly positive correlation while Co showed positive but non-significant correlation in all treatment groups. Mn showed highest bio-concentration factor and enrichment factor values while Cd showed highest health risk index, daily metal intake and pollution load index values. Level of metal toxicity in humans could increase due to irrigation of food crops with untreated waste water. Hence application of waste water must be avoided or its proper treatment before application to agricultural fields must be done.