DUNCAN, Okla. — The National Rural Water Association declared that Rochester has the best-tasting drinking water in Minnesota. Thirty-one local water utilities in the state were considered. The Oklahoma-based NRWA judging panel was comprised of water experts The association, a non-profit, provides training, support and promotion for water and wastewater professionals in small cities and rural communities. The Rochester Public Utilities serves 41,000 businesses and households in 60 square miles.