# Approval and Promulgation of Implementation Plans; Washington: State Implementation Plan Miscellaneous Revisions
> **Rule** · Final rule. · Published 2014-03-04 · Effective 2014-04-03 · 79 FR 12077
## Document
- **Document number:** 2014-04615
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 12077
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-03-04
- **Effective date:** 2014-04-03
- **State:** WA
- **EPA docket:** EPA-R10-OAR-2013-0628: FRL-9907-38-Region 10
## Abstract

The Environmental Protection Agency (EPA) is approving changes to the Washington State Implementation Plan (SIP) submitted by the Washington Department of Ecology (Ecology) dated November 20, 2013. This SIP revision updates ambient air quality standards for carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and sulfur dioxide.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/03/04/2014-04615/approval-and-promulgation-of-implementation-plans-washington-state-implementation-plan-miscellaneous)
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