# Approval and Promulgation of State Implementation Plans: Idaho; Boise-Northern Ada County Air Quality Maintenance Area Second 10-Year Carbon Monoxide Maintenance Plan
> **Rule** · Direct final rule. · Published 2012-08-02 · Effective 2012-10-01 · 77 FR 45962
## Document
- **Document number:** 2012-18787
- **Category:** air-emissions
- **Federal Register citation:** 77 FR 45962
- **CFR reference:** 40 CFR 52
- **Publication date:** 2012-08-02
- **Effective date:** 2012-10-01
- **State:** ID
- **EPA docket:** EPA-R10-OAR-2011-0194
## Abstract

EPA is taking direct final action to approve a State Implementation Plan (SIP) revision submitted by the State of Idaho (the State). The Idaho State Department of Environmental Quality (IDEQ) submitted the Northern Ada County Air Quality Maintenance Area Second 10-year Carbon Monoxide Maintenance Plan on February 10, 2011. In accordance with the requirements of the Federal Clean Air Act (the Act), EPA is approving the revision because the State adequately demonstrates that the Boise-Northern Ada County Air Quality Maintenance Area will maintain air quality standards for carbon monoxide (CO) through the year 2022.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/08/02/2012-18787/approval-and-promulgation-of-state-implementation-plans-idaho-boise-northern-ada-county-air-quality)
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