Generating JSON from a query
I agree with Adam's comment. Generally, you should avoid rolling-your-own JSON. Just create native CF objects as usual (ie CF arrays and structures). Then use SerializeJSON to generate the JSON string. 

SerializeJSON eliminates the need for manual quoting, which dramatically improves the readability of the code IMO. It also handles any escaping of object values automatically (the current code does not). Granted, Adobe's SerializeJSON function does have a few .. "quirks". So you may prefer to use a different implementation. However, the basic approach remains the same.

string function getJSON() output="false"    {    
  var result = [];

  for(var row in this.qryLocation)  {
    arrayAppend(result, [ row.LocationID, row.Address &amp; " " &amp; row.City, row.formatted_CreateDate ] );
  } 

  return serializeJSON(result);  
}