Ohio Rev. Code § 743.25: Jurisdiction of municipal corporations to prevent water pollution.

No person shall pollute a running stream, the water of which is used for domestic purposes by a municipal corporation, by putting therein a putrid or offensive substance, injurious to health. The director of public service of a city or board of trustees of public affairs of a village shall enforce this section. The jurisdiction of a municipal corporation to prevent the pollution of its water supply and to provide a penalty therefor shall extend twenty miles beyond the municipal corporation limits.