Upon receipt of each report of confirmed venous blood lead level equal to or greater than fifteen micrograms per deciliter of blood from January 1, 2023, to December 31, 2023, inclusive, ten micrograms per deciliter of blood from January 1, 2024, to December 31, 2024, inclusive, and five micrograms per deciliter of blood on and after January 1, 2025, the local director of health shall make or cause to be made an epidemiological investigation of the source of the lead causing the increased lead level or abnormal body burden and shall order action to be taken by the appropriate person responsible for the condition that brought about such lead poisoning as may be necessary to prevent further exposure of persons to such poisoning. In the case of any residential unit where such action will not result in removal of the hazard within a reasonable time, the local director of health shall utilize such community resources as are available to effect relocation of any family occupying such unit. The local director of health may permit occupancy in said residential unit during abatement if, in such director’s judgment, occupancy would not threaten the health and well-being of the occupants. The local director of health shall, not later than thirty days after the conclusion of such director’s investigation, report to the Commissioner of Public Health, using a web-based surveillance system as prescribed by the commissioner, the result of such investigation and the action taken to ensure against further lead poisoning from the same source, including any measures taken to effect relocation of families. Such report shall include information relevant to the identification and location of the source of lead poisoning and such other information as the commissioner may require pursuant to regulations adopted in accordance with the provisions of chapter 54. The commissioner shall maintain comprehensive records of all reports submitted pursuant to this section and § 19a-110. Such records shall be geographically indexed in order to determine the location of areas of relatively high incidence of lead poisoning. The commissioner shall establish, in conjunction with recognized professional medical groups, guidelines consistent with the National Centers for Disease Control and Prevention for assessment of the risk of lead poisoning, screening for lead poisoning and treatment and follow-up care of individuals including children with lead poisoning, women who are pregnant and women who are planning pregnancy. Nothing in this section shall be construed to prohibit a local building official from requiring abatement of sources of lead or to prohibit a local director of health from making or causing to be made an epidemiological investigation upon receipt of a report of a confirmed venous blood lead level that is less than the minimum venous blood level specified in this section.