# Approval of Missouri Air Quality Implementation Plans; Infrastructure SIP Requirements for the 2012 Annual Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard Interstate Transport > **Rule** · Final rule. · Published 2018-10-01 · Effective 2018-10-31 · 83 FR 49298 ## Document - **Document number:** 2018-21286 - **Category:** air-emissions - **Federal Register citation:** 83 FR 49298 - **CFR reference:** 40 CFR 52 - **Publication date:** 2018-10-01 - **Effective date:** 2018-10-31 - **State:** MO - **EPA docket:** EPA-R07-OAR-2018-0261 ## Abstract The Environmental Protection Agency (EPA) is finalizing its approval of section 110(a)(2)(D)(i)(I) in a State Implementation Plan (SIP) submission from the State of Missouri for the 2012 Annual Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard (NAAQS). Section 110(a)(2)(D)(i)(I) requires the State to prohibit any source or other type of emissions activity within the State from emitting any air pollutant in amounts which will contribute significantly to nonattainment (prong 1), or interfere with maintenance (prong 2) in any other State with respect to the NAAQs. ## Source - [Federal Register document](https://www.federalregister.gov/documents/2018/10/01/2018-21286/approval-of-missouri-air-quality-implementation-plans-infrastructure-sip-requirements-for-the-2012) --- *AI Analytics · CC0 1.0*