Findings as shown in Table 2 suggest that there is a source of Pb even before the upstream station and is further aggravated at midstream and downstream stations. Non-point sources in the upstream could have contributed to the Pb load such as the deposition from the atmosphere from petrol or industrial sources and old paints [6]. This could be further amplified by anthropogenic activities midstream and downstream. These activities are caulking, soldering and use of paints and pigments that are common among furniture industries. The paint-thinner production facility near midstream station may also contribute to the Pb concentration in the river [12]. In addition, the concrete mix facilities present along the Butuanon River may also have contributed since Pb is naturally present in cements [27]. Gas stations and car service stations found midstream could have also contributed to Pb concentration in the river. Lead in this type of industry is usually from battery electrolytes, paints and thinners [28]. Furniture industries and gas stations are also present downstream in addition to the used-oil treatment facility that could be a unique source of Pb as opposed to other sampling stations. Used oil may contain metals particularly Pb [29]. Adjacent potential sources of Pb may be present midstream but it was found to have smaller Pb concentration both in water and sediment. This is primarily because once a metal is discharge into the river, it is usually carried by the water and it settles several kilometers downstream [30]. This process could explain why Pb concentration is significantly higher downstream.