There are many different collection and handling requirements depending on which test will be performed and if you have an FHA or VA backed loan, sample collection by a disinterested 3rd party is required. I will properly collect the sample and have it analyzed by a certified testing laboratory.
I can arrange for many different water tests, but the following tests are required for VA and FHA loans:
Total Coliform/E. Coli, Nitrates, Nitrites, Lead