# Approval and Promulgation of Implementation Plans; Colorado; Revisions to Regulation Number 4, Sale and Installation of Wood-Burning Appliances and the Use of Certain Wood Burning Appliances During High Pollution Days
> **Rule** · Final rule. · Published 2019-07-17 · Effective 2019-08-16 · 84 FR 34063
## Document
- **Document number:** 2019-15106
- **Category:** air-emissions
- **Federal Register citation:** 84 FR 34063
- **CFR reference:** 40 CFR 52
- **Publication date:** 2019-07-17
- **Effective date:** 2019-08-16
- **State:** CO
- **EPA docket:** EPA-R08-OAR-2019-0054
## Abstract

The Environmental Protection Agency (EPA) is approving State Implementation Plan (SIP) revisions to Colorado Regulation Number 4 (Reg. No. 4), "Sale and Installation of Wood-Burning Appliances and the Use of Certain Wood Burning Appliances During High Pollution Days," submitted by the State on May 2, 2016 and May 14, 2018. The revisions update definitions, emission standards, certification and labeling requirements, and citation references to maintain consistency with the EPA's 2015 Standards of Performance for New Residential Wood Heaters. The EPA is taking this action in accordance with the Clean Air Act (CAA).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/07/17/2019-15106/approval-and-promulgation-of-implementation-plans-colorado-revisions-to-regulation-number-4-sale-and)
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