No stable, pigsty, hogyard, barnyard, chickenyard, hitching or standing place for animals, or any other place where dung and urine accumulate shall be constructed or maintained within Zones A or B, or in Zone C below the Denmark Bridge, except on written approval of the board of health. No stable, pigsty, hogyard, barnyard, chickenyard, hitching or standing place for animals, or any other place where dung and urine accumulate shall be constructed or maintained in Zone C above Denmark Bridge or in Zone D which will threaten objectionable pollution of the reservoirs or any tributary watercourses. ('64 Code, § 36-10)