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On Public Notice | Proposed for Adoption

On Public Notice

Missouri State Implementation Plan Revision – Maintenance Plan Supplement for the Jackson County Nonattainment Area for the 2010 Sulfur Dioxide Standard

The purpose of this SIP revision is to supplement the maintenance plan for the Jackson County nonattainment area under the 2010 sulfur dioxide standard. This action incorporates requirements into Missouri’s SIP to ensure the permanence of fuel changes at a facility that helped bring the Jackson County nonattainment area into compliance with the standard. The Air Program submitted the maintenance plan for the area to EPA in February of 2021. EPA must approve the maintenance plan and this supplement prior to redesignating the area to attainment.

Maintenance Plan Supplement for the Jackson County Nonattainment Area for the 2010 Sulfur Dioxide Standard

Appendix 1

Appendix 2

A public hearing for this plan action will be held on July 29, 2021. Comments about this plan action will be accepted through close of business on Aug. 5, 2021.

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Proposed for Adoption

Missouri State Implementation Plan Revision – Marginal Nonattainment Area Plan for the Missouri Portion of the St. Louis Nonattainment Area Under the 2015 Ozone Standard

The purpose of this state implementation plan revision is to address the emissions inventory and other marginal ozone nonattainment area requirements pursuant to Clean Air Act Section 182(a) for the Missouri portion of the St. Louis nonattainment area under the 2015 ozone standard.  EPA designated this area as a marginal nonattainment area under the 2015 ozone standard on June 4, 2018.

In accordance with RSMo Section 640.090, the department has prepared an implementation impact report to accompany this nonattainment area plan. A link to this report is listed below.

Implementation Impact Report

The Commission held a public hearing for this proposed action on May 27, 2021. Comments on this proposed action were accepted through close of business on June 3, 2021. A copy of all written comments received during the public comment period may be found at the link below. The air program is currently reviewing the comments received and developing responses. The action is currently scheduled to be proposed for adoption at the Aug. 26, 2021 Commission meeting. The air program will update this webpage with a copy of the adoption version of the document(s) for this action along with a copy of the responses to comments once they are complete.

Comments Received