Arsenic has been detected in soil, vegetables, and irrigation water samples from the Delhi, NCR, region. The samples were collected in two distinct seasons: before a monsoon and after a monsoon. The materials were digested using a hot plate before being analysed for arsenic by hydride generating atomic absorption spectrometry. The concentration of arsenic in soil and water samples were below the permissible limits that are 30 mg/kg and 0.10 mg/L given by WHO. Leafy vegetables showed a higher concentration of arsenic when compared with tubers and roots. The mean concentration of arsenic in soil, water, and vegetables is 0.086723 mg/kg, 0.02348 mg/L, and 2.1458 mg/kg, respectively.