Creates the Household Hazardous Waste Stewardship Act. Requires that manufacturers implement a stewardship plan, beginning January 1, 2028, and establishes related prohibitions. Requires a manufacturer to establish, fund, and implement a stewardship program individually or collectively as part of a stewardship organization, with certain funding requirements. Lists other manufacturer and stewardship organization obligations and requirements. Requires each manufacturer who sells covered products in the State to register with a stewardship organization by April 1, 2027, and annually thereafter, and subsequently also with the Environmental Protection Agency. Requires stewardship organizations to post certain information on a website by January 1, 2028. Prohibits a manufacturer from selling a covered product, beginning in program year 2028, unless the manufacturer is registered and operates a stewardship program or is part of a stewardship organization. Requires stewardship organizations to jointly prepare, no later than January 1, 2027, a household hazardous waste needs assessment. Prohibits a retailer from selling a covered product unless the manufacturer is identified as a participant in a stewardship organization with an approved stewardship plan. Requires collection sites to keep certain records and provide certain data. Lists requirements and procedures for stewardship plans. Lists collection convenience standard requirements. Requires each stewardship organization to jointly submit, by June 1, 2029, and annually thereafter, a report to the Agency. Requires a stewardship organization to pay an annual fee to the Agency and lists responsibilities of the Agency. Exempts activities under the Act from antitrust laws. Allows the Agency to adopt rules. Provides civil penalties for violations. Specifies that it is a Class 4 or Class 3 felony to make a fraudulent material statement to the Agency under the Act. Allows for collection of covered products using a premium collection service. Makes findings. Defines terms. Effective immediately.