Conn. Gen. Stat. § 19a-39
The owner of any well which is being constructed or which has been completed shall securely protect or fence the same, and the owner of any well which is no longer used or which has been abandoned shall effectively cover and seal the same so as to prevent danger to any human being or domestic dog, cat or pet or any cattle, horses, asses, mules, sheep, swine or goats. Any person violating any provision of this section shall be fined not less than fifty dollars and not more than one hundred dollars for a first offense, and for each subsequent offense shall be fined not less than one hundred dollars and not more than two hundred dollars. The provisions of this section shall not be construed to repeal any local ordinance, the provisions of which require at least the degree of protection herein required. The local health officer of each municipality is empowered to promulgate and enforce regulations consistent with this section and to carry out its intent.
Conn. Gen. Stat. § 19a-39
(1969, P.A. 75.)
See chapter 482 re regulation of well drilling.