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CHAS: Updates


2009-2013 Release

In June 2016, HUD posted new CHAS data based on the 2009-2013 ACS. These data are available in the data download tool and in the query tool.

2008-2012 Release

Update: On October 28 2015, HUD posted revised 2008-2012 CHAS data in the data download tool. The data previously released in June 2015 contained errors related to the number of affordable housing units (in Tables 14, 15, 17, and 18). The previous data significantly undercounted the number of affordable housing units, at all income levels. The error has been corrected and the revised tables are now available in the data download tool. Data in the CHAS query tool were not affected by this error.

In June 2015, HUD posted new CHAS data based on the 2008-2012 ACS. These data are available in the data download tool and in the query tool. All tables (including Table 6, with disability information) are now available from 5-year ACS data.

2007-2011 and 2009-2011 Releases

On May 28, 2014 HUD posted new CHAS data based on the 2007-2011 and 2009-2011 ACS. These data are available in the data download tool and in the query tool. CHAS data from the 2007-2011 ACS are available for a variety of summary levels, from states down to split census tracts. CHAS data from the 2009-2011 ACS are available for states, counties, minor civil divisions, and places.

On November 15, 2013 HUD released a table generator (also known as a query tool) to make certain commonly used CHAS figures more easily accessible. The table generator is available here: https://www.huduser.gov/portal/datasets/cp.html.

2006-2010 and 2008-2010 Releases

These are updates and corrections related to the CHAS data originally released in May 2013, which used 2006-2010 ACS 5-year data and 2008-2010 ACS 3-year data. In July, HUD identified an error in these data for 15 places where the FIPS code (geographic ID) changed between 2000 and 2010. In those 15 places, the original 2006-2010 and 2008-2010 data did not present an accurate number of households in all income categories below 140% of AMI. On November 15, 2013 HUD posted revised data in the data download tool; CPD Maps has also been updated with the revised data.

On 5/14/2013, HUD posted new CHAS data based on the 2006-2010 and 2008-2010 ACS. The 2006-2010 ACS was used for all CHAS tables except Table 6. Table 6 provides information on disability status, which is not available in the 2006-2010 ACS. Table 6 was produced from the 2008-2010 ACS instead. These data are available in the data download tool. CHAS data from the 2006-2010 ACS are available for a variety of summary levels, from states down to split census tracts. CHAS data from the 2008-2010 ACS are available for states, counties, minor civil divisions, and places.

2005-2007 Release

These are updates and corrections related to the CHAS data released in December 2009, which used 2005-2007 ACS 3-year data.

  • HUD has discovered that part of the methodology for the 2005-2007 CHAS was inconsistent with similar affordability data (including the 2000 CHAS). For jurisdictions with incomes above the US median, the 80% AMI figure used in the 2005-2007 CHAS may be substantially higher than the figure used in the 2000 CHAS, independent of actual income growth. The full list of impacted communities is available here: Analysis of uncapped 80% AMI (*xls). Further explanation of the implications of this error, and how HUD will adjust going forward, is available here: Implications of uncapped 80% AMI (.doc).
  • Renter households that paid no rent and had income greater than zero were treated inconsistently in different tables. In Table 8, these households were considered to have a cost burden of zero, and therefore counted among those with no cost burden. In all other tables involving cost burden (Tables 1, 2, 3, 4, 5, 6, 7, 9, 11, and 12), such households were mistakenly counted among those for whom cost burden could not be computed. As a result, Tables 1, 2, 3, 4, 5, 6, 7, 9, 11, and 12 will overestimate the number of renter households for whom cost burden could not be calculated and underestimate the number of renter households with no cost burden. Counts of cost burdened households are unaffected by this error. This also applies to the housing problems variable, which includes cost burden (Tables 1, 2, 4, 5, 6, and 11). In the future, the Table 8 specification will be used. “Cost burden could not be computed” will only refer to households with zero or negative income; for an explanation of why these households are not assumed to be cost burdened, see the 2007 Worst Case Needs Report pages 84-85 and 89.