MO SB664

Extends the tire recycling fee program beyond its January 1, 2015 expiration date to January 1, 2020, maintaining a 50-cent per tire retail fee with proceeds allocated to waste tire removal, grants for waste tire products, and environmental education.

Restricts the Missouri Air Conservation Commission from regulating residential wood burning heaters and appliances through state implementation plans without specific legislative authorization, and exempts existing wood burning equipment from new regulations enacted after August 28, 2014.

Establishes new emission standards for carbon dioxide from existing power generation plants using unit-by-unit analysis, allowing less stringent standards based on plant age, cost, physical impossibility of compliance, or economic hardship factors.

Requires the Department of Natural Resources to assess environmental need before revising water quality standards, conduct economic impact evaluations for modifications of 25% or more, and make affordability findings for new sewer system permit requirements.

Mandates annual reporting to state leadership on affordability findings for sewer system improvements, including data on rate increases, median household income impacts, and poverty rates in affected communities.