PARCHMENT, Mich. — Authorities handed out thousands of free bottles of water Friday for two southwestern Michigan communities where the discovery of contamination from toxic industrial chemicals prompted a warning against using the public water system for drinking or cooking. Michigan and Kalamazoo County health officials announced a day earlier that tests found perfluoroalkyl and polyfluoroalkyl substances, known as PFAS, in the water supplied to the city of Parchment and neighboring Cooper Township, about 125 miles west of Detroit.