As a concise summary of the ruling: Large CAFOs must comply with the Emergency Planning and Community Right-to-Know Act (EPCRA). It is easier to address the flip side of this question: as a result of the reporting exemption that was provided in the recently published (December 18, 2008) EPA ruling, those livestock and poultry operations that are not considered large CAFOs according to federal NPDES regulations are exempted from requirements to report air emissions that normally arise from raising farm animals. As clarification, regardless of livestock farm size and type, both CERCLA and EPCRA apply in the event of the release of a listed substance in the form of air emissions that don't normally arise from raising farm animals (e.g. a ruptured ammonia tank) or due to a failure in containment (e.g. a farm chemical spill). For more information on this rule see:
EPCRA Requirements This FAQ was developed and reviewed by Chris Henry and Rick Stowell, University of Nebraska and Carol Galloway, US EPA Region 7

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