# Clean Air Act Approval and Promulgation of State Implementation Plan for Colorado; Carbon Monoxide Contingency Measures for Colorado Springs and Fort Collins
> **Rule** · Direct final rule. · Published 1997-12-23 · Effective 1998-02-23 · 62 FR 67006
## Document
- **Document number:** 97-33320
- **Category:** air-emissions
- **Federal Register citation:** 62 FR 67006
- **CFR reference:** 40 CFR 52
- **Publication date:** 1997-12-23
- **Effective date:** 1998-02-23
- **State:** CO
- **EPA docket:** CO-44-1-6866(a)
## Abstract

EPA approves the State implementation plan (SIP) revisions submitted by the State of Colorado with a letter dated February 18, 1994. This submittal addresses the Federal Clean Air Act requirement to submit contingency measures for carbon monoxide (CO) for the Colorado Springs and Fort Collins areas designated as nonattainment for the CO National Ambient Air Quality Standards (NAAQS). The rationale for the approval is set forth in this document; additional information is available at the address indicated below.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/12/23/97-33320/clean-air-act-approval-and-promulgation-of-state-implementation-plan-for-colorado-carbon-monoxide)
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