Heavy metal analyses of the mixed waste are provided in Table 5. Heavy metal concentrations in Sakarya municipal waste are found in the following order: Al > Fe > Ba > Mn > Cu > Cr > Pb > Ni > Cd. This trend is also confirmed by Nas et al. (2008) who conducted a municipal solid waste characterization study in Gümüşhane, Turkey. Despite Al and Fe concentrations in Sakarya, municipal solid waste was found to have the highest values, while heavy metals such as Cd, Ni generally coming from industrial or household hazardous solid waste were found in negligible amounts. When Cd, Cr, Cu, Ni, and Pb contents in the waste samples are compared to the respective limit values in the Soil Pollution Control Regulation (SPCR), it is seen that the concentrations do not exceed the limits.