# Revisions to the California State Implementation Plan, Imperial County Air Pollution Control District and Shasta County Air Quality Management District
> **Rule** · Direct final rule. · Published 2014-08-28 · Effective 2014-10-27 · 79 FR 51261
## Document
- **Document number:** 2014-20504
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 51261
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-08-28
- **Effective date:** 2014-10-27
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2014-0417
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to the Imperial County Air Pollution Control District (ICAPCD) and the Shasta County Air Quality Management District (SHAQMD) portions of the California State Implementation Plan (SIP). We are approving local rules regarding enhanced monitoring under the Clean Air Act (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/08/28/2014-20504/revisions-to-the-california-state-implementation-plan-imperial-county-air-pollution-control-district)
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