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 Regulations of Connecticut State Agencies (Last Updated: June 14,2023)
 Title25 Water Resources, Flood and Erosion Control
 SubTitle25-128-1_25-128-64. Description of Organization, Rules of Practice, and Regulations for the Well Drilling Industry

  Sec.25-128-44. Length of casing, drilled wells  

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  • A twenty (20) foot minimum length of casing pipe shall be required in the construction of any drilled well, subject to the following exceptions for specific, geological and hydrological conditions:

    (a) All unconsolidated overburden and other loose, caving zones shall be cased.

    (b) The casing pipe shall extend at least five (5) feet into the bedrock, as shown by Figure 1.

    (c) In the event, however, that the overburden or the upper five (5) feet of the bedrock constitute the primary potable water producing zones, the requirement of length of subsection (b) shall not apply.

    (d) In the condition of the presence of caving zones, the casing pipe or other adequate protective seal shall extend as great a distance below the caving zone as the driller deems necessary to insure well stability.

    (e) In the event geological conditions require telescoping of the casing pipe and the use of linear pipe, the respective lengths and diameters necessary to accomplish effective drilling shall be used, the annular spaces shall be made watertight where appropriate to prevent the travel of contaminants.

(Effective May 21, 1993)