# National Emission Standards for Hazardous Air Pollutants for Source Categories
> **Rule** · — · Published 2011-12-01 · 76 FR 74708
## Document
- **Document number:** 2011-30998
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 74708
- **CFR reference:** 40 CFR 63
- **Publication date:** 2011-12-01
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/12/01/2011-30998/national-emission-standards-for-hazardous-air-pollutants-for-source-categories)
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