# Approval and Promulgation of Implementation Plans; California State Implementation Plan Revision; El Dorado County Air Pollution Control District
> **Rule** · Direct final rule. · Published 1999-03-30 · Effective 1999-06-01 · 64 FR 15129
## Document
- **Document number:** 99-7668
- **Category:** air-emissions
- **Federal Register citation:** 64 FR 15129
- **CFR reference:** 40 CFR 52
- **Publication date:** 1999-03-30
- **Effective date:** 1999-06-01
- **State:** CA
- **EPA docket:** CA 211-0127a
## Abstract

EPA is taking direct final action to approve revisions to the California State Implementation Plan (SIP). The El Dorado County Air Pollution Control District (EDCAPCD), Rule 239 concerns control of emissions of oxides of nitrogen (NO<INF>X</INF>) from natural gas-fired residential water heaters. This approval action will incorporate this rule into the Federally approved SIP. The intended effect of approving of this rule is to regulate NO<INF>X</INF> emissions in accordance with the requirements of the Clean Air Act, as amended in 1990 (CAA or the Act). Thus, EPA is finalizing the approval of this revision into the California SIP under provisions of the CAA regarding EPA actions on SIP submittals, SIPs for national primary and secondary ambient air quality standards (NAAQS), and plan requirements for nonattainment areas.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/03/30/99-7668/approval-and-promulgation-of-implementation-plans-california-state-implementation-plan-revision-el)
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