You probably do; but in case and to be sure, we suggest a quick farm water (H2O) sample test. Ask for hardness and any harmful contaminants such as e-coli, coliform, nitrates, crypto, iron bacteria, etc. Like stray voltage, water greatly effects milk quality and herd health and production. Since milk is nearly 90% water, you need the best water possible. We like UV lights with wiper blades in well caps – no chemicals needed! Hellenbrand and Culligan are two companies that should be able to help you. And since you are probably also drinking and cooking with this water, we encourage you to do it today!