COVID-19 Community Levels Map Update, Jan. 27, 2023: The CDC has listed three Connecticut Counties—Litchfield, Middlesex and New Haven Counties—in the High/Orange category as part of its weekly COVID-19 Community Levels update. Fairfield, Hartford, New London, Tolland and Windham Counties are listed in the Medium/Yellow category.  Because all eight Connecticut counties are either in the High or Medium categories, the Connecticut Department of Public Health recommends that all residents consider wearing a mask in public indoor spaces. People who are at high risk for severe illness should consider additional measures to minimize their exposure to COVID-19 and other respiratory illnesses. Visit the CDC COVID-19 Community Levels Map for updates.

Please visit to request four free COVID-19 self-test kits from the Federal Government. Find a location that has a supply of COVID-19 therapeutics as part of the Test to Treat initiative here. The complete DPH COVID-19 toolbox is located at

Laboratory Quality Assurance

Magnifier Hovering Over 'Focus on Quality' Text

An established Quality Assurance (QA) Program is a required element of any public health performance management system.   The CT DPH Laboratory QA Program coordinates the monitoring and evaluation of internal laboratory testing services to assure compliance with the federal and state regulations that govern the operations of public health laboratories.


Quality assurance activities are designed to proactively identify and resolve barriers to in-house quality testing.  There are several subparts, including proficiency testing, quality control, and personnel competency assessment.  All phases of testing are also subject to scrutiny, from sample collection and receipt to the analysis and reporting of test results.


The CT DPH Laboratory QA Program also directs Laboratory Client Services, a unit that provides a point of primary contact and advocates for the end users of laboratory services.  Activities include communication and outreach to public health stakeholders and peer laboratories.


Clinical and environmental public health testing is subject to compliance assessments under multiple regulatory agencies, including the CT Department of Public Health and the US Centers for Medicare & Medicaid Services, Environmental Protection Agency, and Food and Drug Administration.  There is also participation in additional external laboratory improvement programs designed to assess esoteric as well as emerging test methodologies.



CT DPH Laboratory licensure, certification, and accreditation documentation includes the following:


Centers for Medicare and Medicaid Services (CMS) CLIA License

  CMS Limited Public Health Testing CLIA License 

  US Environmental Protection Agency (EPA) Drinking Water Certification

  American Industrial Hygiene Association (AIHA) ISO 17025 Accreditation

  Food and Drug Administration (FDA) Accreditation



Contact the Quality Assurance Program at 860-920-6550.



Contact Laboratory Client Services at 860-920-6500.







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