# Approval and Promulgation of Air Quality Implementation Plans; Wyoming; Revisions to the Wyoming Air Quality Standards and Regulations; Ambient Standards for Particulate Matter and for Lead
> **Rule** · Direct final rule. · Published 2014-08-26 · Effective 2014-10-27 · 79 FR 50840
## Document
- **Document number:** 2014-20225
- **Category:** air-emissions
- **Federal Register citation:** 79 FR 50840
- **CFR reference:** 40 CFR 52
- **Publication date:** 2014-08-26
- **Effective date:** 2014-10-27
- **State:** WY
- **EPA docket:** EPA-R08-OAR-2013-0006
## Abstract

The Environmental Protection Agency (EPA) is taking direct final action to approve a State Implementation Plan (SIP) revision submitted by the State of Wyoming. The revision affects Wyoming's Air Quality Standards and Regulations (WAQSR) regarding ambient standards for particulate matter and for lead (Pb). This action is being taken under section 110 of the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2014/08/26/2014-20225/approval-and-promulgation-of-air-quality-implementation-plans-wyoming-revisions-to-the-wyoming-air)
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