N.H. Rev. Stat. Ann. § 485:54

No person shall cut or take ice from any lake, pond or reservoir used as the source of a domestic public water supply, unless he shall first comply in all respects with such reasonable rules regarding the manner and place of such cutting and taking as may be prescribed by the local legislative body, or officers of a water company, who may have charge of the works of any city or town supplying its inhabitants with water from such source.