This Connecticut General Assembly web page lists new laws, effective October 1, 2021. In addition, the page states that "New Legislation Effective Dates are typically January 1, July 1, and October 1 and are included in these lists. Laws may also be effective from passage or based on other criteria or dates. For atypical scenarios, you may use our Advanced Document Search."
As previously posted, the Office of Legislative Research (OLR) makes available its Major Public Acts report for the 2021 legislative session as well.