# Air Plan Approval; Douglas, Arizona; Second 10-Year Sulfur Dioxide Maintenance Plan
> **Rule** · Final rule. · Published 2018-06-08 · Effective 2018-07-09 · 83 FR 26596
## Document
- **Document number:** 2018-12300
- **Category:** air-emissions
- **Federal Register citation:** 83 FR 26596
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-06-08
- **Effective date:** 2018-07-09
- **State:** AZ
- **EPA docket:** EPA-R09-OAR-2017-0537
## Abstract

The Environmental Protection Agency (EPA) is taking final rulemaking action to approve, as part of the State Implementation Plan (SIP) for the State of Arizona, the second 10-year maintenance plan for the Douglas maintenance area for the 1971 National Ambient Air Quality Standards ("standards") for sulfur dioxide (SO<INF>2</INF>).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/06/08/2018-12300/air-plan-approval-douglas-arizona-second-10-year-sulfur-dioxide-maintenance-plan)
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