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Greenhouse gas reduction requirements

In March 2018, Thurston County Superior Court ruled that parts of the Clean Air Rule are invalid. The Superior Court's ruling prevents us from implementing the Clean Air Rule regulations that cap and gradually reduce major sources of carbon pollution. This means that compliance with the rule currently is suspended. On May 14, 2018 we published a media release and filed an appeal with the Washington State Supreme Court.

Under a separate Ecology rule, facilities covered by the Clean Air Rule still are required to report their emissions for the Greenhouse Gas Reporting program.

Determining a business's reductions

We determine reductions using a business's baseline greenhouse gas emissions. A business's baseline is the average amount of their covered emissions that they reported to us through our Greenhouse Gas Reporting program from 2012-2016.