COVID-19 Community Levels Map Update, Jan. 20, 2023: The CDC has listed six Connecticut Counties—Hartford, Litchfield, Middlesex, New Haven, Tolland and Windham Counties—in the High/Orange category as part of its weekly COVID-19 Community Levels update. Fairfield and New London 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

Public Water System Lists

The following lists contain information on Connecticut’s public drinking water systems. The systems are divided by “classification” or “type of system”. There are 3 types of public drinking water systems: “Community Water Systems” which serve at least 25 residents throughout the year’ “Non-transient, Non-Community Systems” which are not community systems and regularly serve at least 25 of the same people over six months of the year at places like schools and office buildings; and “Transient Non-Community Systems” which do not meet the definition of a non-transient, non-community water system such as restaurants, parks, etc. We regulate these systems to assure a safe and adequate supply of drinking water is available. You will find information such as the system name, city served by the system, population served, whether the source of the water is from “groundwater” (well), or “surface water” (reservoir), the contact information and address of the system(s). Click on the following links to view this information: