After the release of the 2022 American Community Survey (ACS) data products, an error was identified in the Migration/Residence One Year Ago data among respondents who reported moving within the state of Connecticut or from the state of Connecticut to another state or Puerto Rico. Due to the change of county boundaries in Connecticut, respondents reporting a Connecticut county as their residence one year ago were systematically excluded from the donor pool for allocating missing or inconsistent data. This processing error resulted in a decreased share of allocated migration geographies originating in Connecticut. The error was present in 2022 1-year and 2018-2022 5-year data products and Public Use Microdata Sample (PUMS) files.

The error had the impact of overestimating movers from different states and Puerto Rico to Connecticut, underestimating movers within Connecticut, and underestimating movers from Connecticut to other states and Puerto Rico. For Connecticut as a state of current residence or previous residence, users should not compare 2022 1-year and 2018-2022 5-year estimates to other ACS data. The 2022 estimates will be suppressed in future 1-year and 5-year Comparison Profiles for Connecticut and nested geographies. Affected estimates include Same county; Different county, Same state; and Different county, Different state in CP02. For other states and Puerto Rico, users should use caution when comparing 2022 1-year and 2018-2022 5-year estimates to other ACS data.

Data for total movers, non-movers, and movers from abroad were not affected by the error. Estimates for Place of Work were unaffected.

The processing error impacting 2022 has been corrected for the 2023 1-year estimates. Revised data for 2022 will be used to create the 2023 and later 5-year ACS estimates.