# Approval of California Plan Revisions; Northern Sonoma County Air Pollution Control District; Stationary Source Permits
> **Rule** · Final rule. · Published 2018-07-24 · Effective 2018-08-23 · 83 FR 34949
## Document
- **Document number:** 2018-15727
- **Category:** air-emissions
- **Federal Register citation:** 83 FR 34949
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-07-24
- **Effective date:** 2018-08-23
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2018-0171
## Abstract

The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Northern Sonoma County Air Pollution Control District (NSCAPCD or District) portion of the California State Implementation Plan (SIP). These revisions concern the District's prevention of significant deterioration (PSD) permitting program for new and modified sources of air pollution. We are approving local rules under the Clean Air Act (CAA or the Act).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/07/24/2018-15727/approval-of-california-plan-revisions-northern-sonoma-county-air-pollution-control-district)
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