Solubility of phenanthrene in ternary mixtures of ethanol +1-propanol + methanol, ethanol + 1-propanol + 2-propanol, 1-butanol + methanol + 2-propanol, 1-butanol + ethanol + 1-propanol, and 1-butanol + 1-propanol + methanol are reported. Five numerical methods were used to predict solubility of phenanthrene in studied ternary mixtures, and the mean relative deviation (MRD) was used as a criterion of error. The MRD values for studied mixtures of alcohols were 3.7%, 18.0%, 12.0%, 99.7%, and 12.7%, respectively, for methods I-V.