# Determination of Attainment by the Attainment Date But for International Emissions for the 2015 Ozone National Ambient Air Quality Standards; Phoenix-Mesa Nonattainment Area, Arizona
> **Rule** · — · Published 2026-04-06 · 91 FR 17144
## Document
- **Document number:** C1-2026-05601
- **Category:** air-emissions
- **Federal Register citation:** 91 FR 17144
- **CFR reference:** 40 CFR 52
- **Publication date:** 2026-04-06
- **State:** AZ
- **EPA docket:** EPA-R09-OAR-2025-2833
## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/06/C1-2026-05601/determination-of-attainment-by-the-attainment-date-but-for-international-emissions-for-the-2015)
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