# Air Plan Approval; Wisconsin; Particulate Matter Standard
> **Rule** · Final rule. · Published 2018-09-17 · Effective 2018-10-17 · 83 FR 46882
## Document
- **Document number:** 2018-20038
- **Category:** air-emissions
- **Federal Register citation:** 83 FR 46882
- **CFR reference:** 40 CFR 52
- **Publication date:** 2018-09-17
- **Effective date:** 2018-10-17
- **State:** WI
- **EPA docket:** EPA-R05-OAR-2018-0008
## Abstract

The Environmental Protection Agency (EPA) is approving a January 4, 2018, request by the Wisconsin Department of Natural Resources (Wisconsin) to revise its state implementation plan (SIP) for fine particulate matter (PM<INF>2.5</INF>). Wisconsin updated its ambient air quality standards for PM<INF>2.5</INF> to be consistent with EPA's 2012 revision to the PM<INF>2.5</INF> national ambient air quality standards (NAAQS). Wisconsin also revised its incorporation by reference rule to update references to the EPA monitoring methods.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/09/17/2018-20038/air-plan-approval-wisconsin-particulate-matter-standard)
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