# Air Plan Approval; Iowa; Polk County; State Implementation Plan
> **Rule** · Final rule. · Published 2021-09-21 · Effective 2021-10-21 · 86 FR 52413
## Document
- **Document number:** 2021-20157
- **Category:** air-emissions
- **Federal Register citation:** 86 FR 52413
- **CFR reference:** 40 CFR 52
- **Publication date:** 2021-09-21
- **Effective date:** 2021-10-21
- **State:** IA
- **EPA docket:** EPA-R07-OAR-2019-0708
## Abstract

The Environmental Protection Agency (EPA) is approving revisions to the Iowa State Implementation Plan (SIP) to include changes to the Polk County Board of Health Rules and Regulations in addition to revisions from past submittals. The revisions update definitions and references to the effective dates of Federal rules approved into the State's SIP, prohibit burning of demolished buildings, update references to methods and procedures for performance test/stack test and continuous monitoring systems, and revise permitting exemptions. These revisions will not adversely impact air quality and will ensure consistency between the State and Federally approved rules.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/09/21/2021-20157/air-plan-approval-iowa-polk-county-state-implementation-plan)
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