In comparing what comes back from the EPA page to what we get back, there are a number of WATER SYSTEMS that are not included in our resultset. No obvious pattern for why. For example, select CA and SANTA CLARA COUNTY in each system. On the EPA page there are a number of "CITY OF..." entries that do not show in our system. Resolution would require a much deeper dive and understanding of the way that the EPA is modeling data.
Try to figure out the source of this data from the SDWIS page and substitute in our application. Per Wes, this is not critical. Therefore, if extremely difficult to identify the source of this data, we can remove from our application.