If you’re on a property which gets its water from a well, you need to have it tested to ensure that it’s safe. If you haven’t had your water tested, you are most certainly putting your family’s health at risk. Sources of Contamination First of all, possible sources of contamination can be numerous. These include: dog kennels, agriculture, fuel tanks, septic fields, old wells, and improperly designed wells.  Wells did not need a well surface seal