Multiple choice general knowledge How much cubic ft amount of water pours over Niagara Falls every second? 200,000 50,000 100,000 300,000 Reveal answer Fill a bubble to check yourself C Correct answer Explanation During peak daytime tourist season, approximately 100,000 cubic feet per second flows over Niagara Falls. This flow is regulated jointly by the U.S. and Canada through hydroelectric diversions, with significantly reduced flow at night and in winter.