Apart from the first week from the first death in the New York Times data at us-covid-tracker.com, Feb 29-Mar 7, the peak rate was achieved on Sat Mar 28 at 30.3%. The compound daily growth rate had dropped to just 3.2% by May 2.
This chart shows rates only after falling below 1% in order to show the current scale and the clear bottoming on Jul 4.
