# Revisions to the Hawaii State Implementation Plan
> **Rule** · Direct final rule. · Published 2004-07-09 · Effective 2004-09-07 · 69 FR 41431
## Document
- **Document number:** 04-15527
- **Category:** air-emissions
- **Federal Register citation:** 69 FR 41431
- **CFR reference:** 40 CFR 52
- **Publication date:** 2004-07-09
- **Effective date:** 2004-09-07
- **State:** HI
- **EPA docket:** HI 001-001a
## Abstract

EPA is taking direct final action to approve a revision to the Hawaii State Implementation Plan (SIP). Under authority of the Clean Air Act as amended in 1990 (CAA or the Act), we are approving an amendment to the Air Quality Surveillance Network.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/07/09/04-15527/revisions-to-the-hawaii-state-implementation-plan)
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