Conflicting information

[Account Closed]

I have been looking at buying a home to flip in Hamden County, CT. The bank told me that there is a private well and septic system, and that there may or may not be issues with them that could cost an upwards of $30k to fix. Today, while looking at the field card, I noticed that the city's records show the house is connected to to public water and sewer system. The bank claims its records of the private well and septic system came from the city, but I don't even see a mention of there being a well or septic system on the property. Who should I talk to about confirming which set of information is correct, or should I just assume the field card is correct?