Well Testing For Bacteria, Nitrates & Lead
State requirements for private well testing at the time of property sale vary from state-to-state. It is best to check with the state drinking water agency for requirements. In addition, your client can ask the appropriate state agency about any known contamination problems in the area to assist in determining what contaminants to test for.
The buyer's lending institution will also most likely require that the well pass a water quality test prior to loan approval. Most lenders require testing for bacteria, nitrates and lead at a minimum. Keep in mind that these tests are intended to ensure that the lender is not making a loan on a property with water system problems protecting both the lender and buyer.