Town of Arlington, Fair Housing Action Plan (July 2021)

Citation: Town of Arlington, Fair Housing Action Plan (July 2021)
Jurisdiction: Arlington (municipal)
Source: Official source
Original Source: https://www.arlingtonma.gov/home/showpublisheddocument/57214/637641171662530000 ↗

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Appendix A:
Quantitative Data Sources
Census Data
This plan primarily uses data from the American Community Survey (ACS). The ACS is a program of the U.S.
Census Bureau, which surveys a subset of the population each month and publishes data on an annual basis in the
form of ACS 1-Year Estimates, for areas with populations of 65,000 or more, and ACS 5-Year Estimates, for all
other areas.66 With some exceptions noted in the text, this analysis used data from ACS 2013-2017, which was
the most recent data available in fall 2019. Note that Arlington’s Consolidated Plan uses 2011-2015 ACS data;
discrepancies between the numbers cited here and those in the Consolidate Plan are likely due to the different
years considered.
MAPC supplemented ACS data with Decennial Census data when evaluating the distribution of protected classes
in Arlington. Decennial Census data, though current to 2010, reflects a complete enumeration of the population,
rather than estimates based on samples, and therefore offers better resolution when looking at subsets of the
population within subdivisions of a municipality.

66 The name Estimates reflects the fact that ACS data is based on samples of the population, rather than a complete enumeration, and

therefore contains uncertainty. This uncertainty is described by margins of error, which are provided for every estimate. The Census
Bureau uses a 90% confidence level for their margins of error, meaning if the Census Bureau were to repeatedly make new estimates
using the same process, the confidence interval would contain an average of all the estimates 90% of the time.

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Arlington Fair Housing Action Plan

Additional Data Sources
MAPC also used data from the sources below.
Table 13: Additional Data Sources