There are thousands of faulty records, some missing quadrants, incorrect street names, incorrect address numbers, missing premise addresses and more.
For an example go to: Search Real Property Assessment Database
Type in Square '0185' and Lot '0828' and then click 'Search Now' You will find that the Premise address field is missing the quadrant designation (it should be NW).
Below is an example where the ITS has incorrect addresses for four properties along 1400 block of 19th Street SE. In the image below the Master Address Repository (MAR) addresses are the green dots and the ITS addresses are the blue dots. It is clear from the image that their is a discrepancy between the MAR and the ITS regarding the proper locations of the addresses. In this case the MAR is correct. This has been confirmed by using USPS and Google Street View.
The ITS is one of many sources for the MAR. Unfortunately, some of the address errors in the ITS have infiltrated their way into the MAR. In the past few years, most of these address errors have been removed from the MAR. Now it is time for ITS to clean up their data.