It is time for state and federal legislators to strengthen regulations that protect U.S. drinking-water supplies and for government agencies to aggressively enforce the rules. Regulation-averse West Virginia passed its own bill after the Elk River spill. Congress should follow its lead and pass the Chemical Safety and Drinking Water Protection Act. The law would require states or the epa to inventory chemical storage facilities and to examine them annually. Storage tanks would also have to meet minimum standards for construction and leak detection. The Senate Committee on Environment and Public Works approved the legislation in April, but as of early May, the bill had not been scheduled for a full Senate debate. Opposition to the bill is being led by energy, utility and industrial companies that would be forced to upgrade their infrastructure.