LUCA helps the Census Bureau develop the housing unit and group quarters address list that we will use to conduct the 2030 Census. Other methods we use to keep the Census Address List current include:

• Updating the Census Address List with United States Postal Service address files.
  
• Using automated change detection with imagery at moderate and high-resolution to identify change areas for further research.
• Comparing identified areas of change to parcel data and building footprints.
• Applying data science practices to automate and improve accuracy of address updates.
• Using in-office research and updates to supplement automated processes.

There have been continued advancements in the tools, sources, and methods available to maintain the Census Address List, resulting in increased accuracy in most areas of the country.

LUCA is an opportunity to provide input that helps ensure a complete and accurate address list for your jurisdiction, which is an important step towards ensuring everyone is counted in the 2030 Census.

The Census Bureau estimates that trillions of dollars in federal funding have been distributed annually to tribal governments, states, communities, and other recipients using Census Bureau data in whole or in part. This includes data from the decennial census. Programs include health care, nutrition, highways, housing, school lunches, childcare and more. Read more about how decennial census data impacts federal funding in this report.

• Federally recognized Tribal Nations with a reservation and/or off-reservation trust lands.
• States.
• Counties.
• Cities (incorporated places).
• Townships (minor civil divisions).

Highest elected/appointed officials from active, functioning, legal governments can designate the person who will represent their jurisdiction. This may include direct employees, interns, contractors, or designating alternate reviewers, such as county, state data center, or regional planning agency.

Local address sources, such as building permits, E-911 address files, local utility records, annexation records, or taxation files may be available. The address list should include location information, such as latitude and longitude. Community-based organizations may also be a resource to identify any missing or hidden housing.

Only residential living quarters will be included in the frame for 2030 Census operations, so care should be taken to exclude other addressed structures, such as libraries, fire hydrants, or businesses.

• You can use the Current Address Count Listing Files and the Housing Unit Change Viewer (2020 to current) to review address changes in your community compared to the 2020 Census. See Data Gem: Tracking Housing Trends with the Housing Unit Change Viewer.
• Additionally, the Participant Address List Template will help ensure that your address data meets the minimum requirements should you decide to submit updates during the address review and update submission period.
• Access these in the section below: Resources You Can Use to Prepare

The Census Bureau uses a variety of sources to maintain the address list. Consider publishing address data in the National Address Database (NAD) and sharing address and parcel data online.

Governments may lack the time or resources to conduct a thorough analysis of address data. Find out if an alternate reviewer is available to support your governments’ work to review the block counts and potentially the Census Address List once the review period begins.

Alternate reviewers may include the county, state, state data center, or regional planning agency. Funding is not available from the Census Bureau but may be available from other sources.

• Governments receive materials about LUCA, are invited to set up accounts, and register.
• Governments conduct block-level address count comparisons and have option to practice an address-level review.
• Submissions will not be accepted at this time, but there will be opportunities for training and hands-on practice.

• Continued opportunity to learn about LUCA, set up accounts, and register.
• Governments conduct block-level address count review and can review the Census Address List and submit suggestions to add, delete, or update the geographic location of residential addresses.
• There will be a firm deadline for LUCA submissions so that the Census Bureau has time to process submissions and ensure all eligible addresses are included in the 2030 Census.

• Governments receive address-level feedback on how their submissions are incorporated into the Census Address List.
  
• Governments must submit any appeals within 45 days of receiving feedback to the Office of Management and Budget (OMB).

• The closeout phase marks the end of governments’ access to confidential LUCA materials.