From the moment you step inside, you'll notice what makes us different: the warmth and attentiveness of our physicians and nurses, the cleanliness of our facilities, and the way we make patients, and their families feel that they are truly being cared for, like a member of our family. . Saint Mary’s Hospital is a Catholic, not-for-profit, community teaching hospital that has been serving patients in Waterbury, CT, and our surrounding communities since 1909.