Based on USTR Statement released on August 23, 2019:
On October 1, 2019, List 1-3 tariffs will go up from 25% to 30%.
In addition, list 4A tariffs will increase from 10% to 15% effective September 1 and List 4B tariffs will increase from 10% to 15% effective December 15.
Official notice can be found here: https://ustr.gov/about-us/policy-offices/press-office/press-releases/2019/august/ustr-statement-section-301-tariff
Stay tuned for updates and more information as they become available.