The board has regulatory authority over all public water systems in the state insofar as purity, potability, wholesomeness and physical quality of water which may affect the public health, comfort or well-being and shall, from time to time, examine, investigate and monitor the sources of public water supplies, the method of protecting groundwater supplies and the method of filtering, treating, storing and delivering water to consumers. The board shall consult with and advise suppliers of water or persons intending to become suppliers of water as to the best source of water and the best method of assuring its purity.