EPA 2021 Ozone Data Certification Lake Porter Clark Floyd
Summary
The EPA has certified 2021 ozone monitoring data for Lake, Porter, Clark, and Floyd counties in Indiana and Kentucky (EPA Region 5). The document is hosted on Regulations.gov as part of a state implementation plan review docket. The source web page provides only a download link to the PDF content with no substantive text describing the certification findings or data quality.
About this source
Every Environmental Protection Agency document on regulations.gov, the federal rulemaking portal: pesticide tolerance proposals, NESHAP technology reviews, Clean Air Act SIP submissions, hazardous waste rule changes, ICR survey notices, and consultation rounds for any of the above. Around 320 a month. EPA is one of the heaviest users of regulations.gov, partly because the Federal Register version of any EPA action is usually shorter than the supporting docket which lives here. Watch this if you advise on environmental compliance, run an emissions program at an industrial facility, or track Toxic Substances Control Act and Clean Water Act enforcement trends. GovPing surfaces each posting with the docket ID, document type, and comment window where applicable.
What changed
The EPA certified 2021 ozone air quality monitoring data for four Indiana/Kentucky counties under Clean Air Act requirements. The certification confirms the data meets federal quality assurance standards for inclusion in state implementation plan assessments. Affected jurisdictions and regulated entities relying on this data for compliance demonstrations should confirm they are using the certified dataset.
State environmental agencies and regulated sources in the affected counties should verify their compliance submissions reference the correct certified monitoring year data. Industrial facilities with ozone-related permit conditions may have compliance calculations tied to this certified data.
Archived snapshot
Apr 27, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
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