A method for producing acetic acid, comprising: a carbonylation reaction step of reacting methanol with carbon monoxide in a reaction vessel in the presence of a catalyst system containing a metal catalyst and methyl iodide as well as acetic acid, methyl acetate, and water to produce acetic acid; an evaporation step of separating a reaction mixture obtained in the carbonylation reaction step into a vapor stream and a residual liquid stream in an evaporator; a lower boiling point component removal step of separating the vapor stream by distillation into an overhead stream rich in at least one lower boiling point component selected from methyl iodide and acetaldehyde and a first acetic acid stream rich in acetic acid; a dehydration step of separating the first acetic acid stream by distillation into an overhead stream rich in water and a second acetic acid stream more enriched with acetic acid than the first acetic acid stream; and an adsorptive removal step of treating the second acetic acid stream, or an acetic acid stream that has been more enriched with acetic acid by further purification of the second acetic acid stream, with a cation exchange resin in which a portion of leaving protons in an exchange group is substituted by silver, wherein a nickel base alloy or zirconium is used as a material of a distillation column in the dehydration step, and as metal ion concentrations in a charging mixture of the distillation column in the dehydration step, an iron ion concentration is less than 9,000 ppb by mass, a chromium ion concentration is less than 4,000 ppb by mass, a nickel ion concentration is less than 2,500 ppb by mass, a molybdenum ion concentration is less than 1,700 ppb by mass, and a zinc ion concentration is less than 800 ppb by mass, and wherein for controlling the metal ion concentrations in the charging mixture to be within the above ranges, the method includes at least one of (i) employing a nickel base alloy or zirconium as the material of the charging pipe to the distillation column in the dehydration step; (ii) providing an ion exchange resin column or vessel at a position between an outlet of the reaction vessel and an inlet of the distillation column in the dehydration step, and (iii) using methanol having a zinc ion content of less than 10 ppm by mass as the methanol to be fed to the reaction vessel. a carbonylation reaction step of reacting methanol with carbon monoxide in a reaction vessel in the presence of a catalyst system containing a metal catalyst and methyl iodide as well as acetic acid, methyl acetate, and water to produce acetic acid; an evaporation step of separating a reaction mixture obtained in the carbonylation reaction step into a vapor stream and a residual liquid stream in an evaporator; a lower boiling point component removal step of separating the vapor stream by distillation into an overhead stream rich in at least one lower boiling point component selected from methyl iodide and acetaldehyde and a first acetic acid stream rich in acetic acid; a dehydration step of separating the first acetic acid stream by distillation into an overhead stream rich in water and a second acetic acid stream more enriched with acetic acid than the first acetic acid stream; and an adsorptive removal step of treating the second acetic acid stream, or an acetic acid stream that has been more enriched with acetic acid by further purification of the second acetic acid stream, with a cation exchange resin in which a portion of leaving protons in an exchange group is substituted by silver, wherein a nickel base alloy or zirconium is used as a material of a distillation column in the dehydration step, and as metal ion concentrations in a charging mixture of the distillation column in the dehydration step, an iron ion concentration is less than 9,000 ppb by mass, a chromium ion concentration is less than 4,000 ppb by mass, a nickel ion concentration is less than 2,500 ppb by mass, a molybdenum ion concentration is less than 1,700 ppb by mass, and a zinc ion concentration is less than 800 ppb by mass, and wherein for controlling the metal ion concentrations in the charging mixture to be within the above ranges, the method includes at least one of (i) employing a nickel base alloy or zirconium as the material of the charging pipe to the distillation column in the dehydration step; (ii) providing an ion exchange resin column or vessel at a position between an outlet of the reaction vessel and an inlet of the distillation column in the dehydration step, and (iii) using methanol having a zinc ion content of less than 10 ppm by mass as the methanol to be fed to the reaction vessel.