Boundary and Annexation Survey

BAS-1L
(9-2017)

DC

UNITED STATES DEPARTMENT OF COMMERCE
Economics and Statistics Administration

U.S. Census Bureau
Washington, DC 20233-0001
OFFICE OF THE DIRECTOR

A Message from the Director, U.S. Census Bureau...
The U.S. Census Bureau (Census Bureau) conducts the Boundary and Annexation Survey (BAS)
to update our records regarding changes to legal boundaries, names, and governmental status of
all governmental units effective on or before January 1 of the survey year. This voluntary survey
is an important opportunity for you to ensure that we have the correct boundary and legal name
for your government. The Census Bureau will use the boundary information you provide to report
data from the Population Estimates Program (PEP), the American Community Survey (ACS), and
other Census Bureau programs and surveys.
Step 1 Respond to the Boundary and Annexation Survey:
• Complete the online BAS Annual Response Form and Contact Update information online at
https://www.census.gov/geo/partnerships/bas/bas_ar_form.html
OR
• Send an email to [email protected] indicating (1) whether you have boundary changes to
report (yes or no), and (2) whether the Highest Elected Official and BAS contacts are current
and the associated contact information for each is correct. If not, please provide updated
information. Be sure to include the 11-digit BAS ID listed at the top of this letter in the subject
line of your message.
NOTE: If you have no boundary changes to report, we ask that you still provide a “NO”
response. Because we must contact all nonresponding governments, your “NO” response
is appreciated.
FOR COUNTY GOVERNMENTS: Please contact us if you are participating in a Consolidated
BAS (CBAS) agreement (where the county responds to the BAS on behalf of some or all of the
governmental units in the county) and need to update the list of governments for whom you are
reporting, OR if your county is not yet participating but you are interested in CBAS.
(To verify CBAS participation, visit our participant list at https://www.census.gov/programs-surveys/
bas/information/consolidated-bas.html)
Step 2 Report Boundary Changes (if in Step 1 you indicated boundary changes to report):
BAS materials will be posted for download on our website https://www.census.gov/programs-surveys/bas.html
beginning in January 2018.
KEY DATES
January 1, 2018
March 1, 2018

All boundary changes must be legally in effect on or before this date to be
reported under the BAS 2018.
BAS submission date deadline for boundary updates to be reflected in the
ACS and PEP published data. Boundary submissions received by this date are
also reflected in next year’s BAS materials.
census.gov

May 31, 2018

BAS submission date deadline for boundary updates to be reflected in next
year’s BAS materials. Submissions after this date are not guaranteed to be
reflected in next year’s BAS materials.
The Census Bureau will attempt to include submitted street and landmark
updates as resources permit.

Please note that your response to the BAS does not replace any state or county reporting
requirements. Visit https://www.census.gov/programs-surveys/bas/information/state-agreements.html
for state reporting requirements.
The Census Bureau appreciates your response to this important voluntary survey. If you need any
assistance with this request, please email , telephone 1–800–972–5651, or
visit https://www.census.gov/programs-surveys/bas.html
Enclosures

BAS-1L (9-2017)