The study focused on the environmental risk evaluation of heavy metals in road runoff as non-point source in the selected Routes in Owerri using Absorption Atomic Spectrophotometer. The major roads selected include Aba Road (RRSP1), Orji Road (RRSP2), Orlu Road (RRSP3), Onitsha Road (RRSP4), Wetheral Road (RRSP 5), Okigwe Road (RRSP6), and Port-Harcourt Road (RRSP) respectively. A total of twenty one runoff samples, three each from the seven selected roads were collected across three months (April-July, 2012), and analyzed using the M-Atomic Absorption Spectrophotometer (AAS). Results shown that heavy metal concentrations originating from the non-point source (NPS) in the six selected routes were in the following ranges: Cd (0.02–0.04 µg/l-1), Cu (10.00-45.00 µg/l-1), Cr (0.01-7.00 µg/l-1), Zn (15.00–103.00 µg/l-1), and Pb (12.00–79 µg/l-1), which further explained that concentrations were higher in the months of April and May in Aba road and reduced in other routes. An increased in heavy metals were observed during the month of July than the month of May. Statistically, mean variations were observed among heavy metals from road runoff that ranged between: Cd 0.07 µg/l-1, Cr 3.10 µg/l-1, Cu 22.70 µg/l-1, Pb 36.70 µg/l-1 and Zn 51. 40 µg/l-1in order of Zn> Pb> Cu> Cr> Cd respectively. The results also indicated that Cd, Cu, Cr, Zn and Pb concentrations in road runoff sampled were above the FMENV and WHO standards for potable water during the month of April being first flush, May being the after first flush and July that proceeds August break that affects man and his environment.