(a) Any person who bathes or swims in any reservoir from which the inhabitants of any town, city or borough are supplied with water, or in any lake, pond or stream tributary to any distribution reservoir, or in any part of any lake, pond or stream tributary to any storage reservoir, which part is distant less than two miles measured along the flow of water from any part of such storage reservoir, and any person who causes or allows any pollutant or harmful substance to enter any such public water supply reservoir, whether distribution or storage, or any of its tributaries, or commits any nuisance in any public water supply reservoir or its watershed, shall be fined not more than five hundred dollars. For the purposes of this section, “storage reservoir” means an artificial impoundment of substantial amounts of water, used or designed for the storage of a public water supply and the release thereof to a distribution reservoir, and “distribution reservoir” means a reservoir from which water is directly released into pipes or pipelines leading to treatment or purification facilities or connected directly with distribution mains of a public water system. Notwithstanding the provisions of this subsection, a person shall be permitted to swim in any body of water where flood-skimming is used to transfer excess water from the body of water to a distribution reservoir during periods when flood-skimming is not occurring, provided swimming has been permitted in such body of water for a period of not less than fifty years.

(b) No person, after having received notice or after notice has been posted that any reservoir, lake or pond, or any stream tributary thereto, is used for supplying the inhabitants of a town, city or borough with water, shall wash any animal or clothing or other article or allow any animal to enter therein. No person shall cause or allow any pollutant or harmful substance to enter such reservoir, lake, pond or stream, nor shall any person, after receipt of written notice from the municipality, water company, as defined in § 25-32a, or the local director of health having jurisdiction, or their agents, that the same is detrimental to such water supply, permit any such substance to be placed upon land owned, occupied or controlled by such person, so that the same may be carried by rains or freshets or otherwise flow into the water of such reservoir, lake, pond or stream, or allow to be drained any sewage from such land into such water. Any person who violates any provision of this subsection shall be fined not more than five hundred dollars or imprisoned not more than thirty days, or both.

(c) No person shall cause or permit an aircraft, as defined in subdivision (5) of § 15-34, to land upon, take off from or be operated, kept, parked, garaged, stored or otherwise maintained on any distribution or storage reservoir or on any watercourse tributary to any such reservoir. Any person who violates a provision of this subsection shall be fined not more than five hundred dollars or imprisoned not more than thirty days, or both.

(d) Any water company, as defined in § 25-32a, aggrieved by a violation of this section may institute a civil action in the superior court for the judicial district where such reservoir or watercourse tributary is located, either entirely or in part, to recover all damages, expenses and costs incurred by the water company in responding to the violation and the remediation and abatement of any contamination resulting from the violation.