Private well owners are responsible for testing their water
Unlike public drinking water supplies, private wells are not regulated by EPA. Owners of private wells are responsible for testing their water to make sure it is safe to drink.
If you have a private well, test it at least once a year for mechanical problems, cleanliness, coliform bacteria, nitrates, and any other germs or chemicals of local concern. Also check your well after flooding or if you suspect a problem (for example, a change in taste or smell). Germs and chemicals can get in wells after flooding, particularly if wells are shallow, were dug or bored, or were covered by floodwater for days or weeks.
