One of the confusing issues regarding census tracts for 2014 is the way the FFIEC has recognized "underwater tracts". In previous years the FFIEC had intended to omit underwater tracts knowing that they are nonsensical for CRA purposes. But owing to a misunderstanding about the numbering of those tracts the FFIEC inadvertently included some of the underwater tracts in its official tract listings prior to 2014.
I had communicated with the FFIEC about this because I wondered about the inconsistency. It turns out they had thought all underwater tracts were numbered 9900 and above (not including tracts 99999) but there are census tracts that are underwater that don't meet that criterion. The upshot is that the FFIEC decided to include all underwater tracts in its Census file for 2014 (I assume they will continue to do so in 2015). Officially, there are 366 such tracts based on the number coding, but there are other underwater tracts too. In any event, this means that there are counties with underwater tracts included in the FFIEC official tract listings that are going to be included in your Assessment Area. You should be aware of those tracts because there are no demographics associated with them and there should be no lending either (but a bank that mistakenly geocodes loans to one of those tracts would have reported such loans in its annual HMDA or CRA filing). Any such tracts would be numbered 990000 to less than 999999
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