EPA Proposes Illinois Regional Haze Plan Approval

The Environmental Protection Agency (EPA) has proposed approving Illinois's regional haze plan for the second implementation period. This action addresses the interstate transport of air pollution related to the 2012 PM2.5 and 2015 Ozone National Ambient Air Quality Standards. The public comment period for this proposed rule closes on March 30, 2026.

EPA Proposes Clean Data Determination for Cleveland Ozone Area

The Environmental Protection Agency (EPA) has proposed a clean data determination for the Cleveland, Ohio area concerning the 2015 ozone standard. This action is part of the EPA's air plan approval process for Ohio. The public comment period for this proposed rule closes on March 30, 2026.

EPA Proposes Indiana VOC RACT Alternative Control Rule

The Environmental Protection Agency (EPA) has proposed a rule to approve an alternative control rule for Volatile Organic Compounds (VOC) Reasonably Available Control Technology (RACT) in Indiana. This proposed rule is open for public comment until March 30, 2026.

EPA Proposes Ohio SIP Approval for VOC/NOX RACT

The Environmental Protection Agency (EPA) has proposed approval of Ohio's State Implementation Plan (SIP) revisions concerning Volatile Organic Compounds (VOC) and Nitrogen Oxides (NOx) Reasonably Available Control Technology (RACT). This proposal includes source-specific RACT requirements and SIP strengthening measures for Ohio.

EPA Extends 2025 GHG Reporting Deadline

The Environmental Protection Agency (EPA) has extended the deadline for reporting greenhouse gas (GHG) emissions for the 2025 reporting year. Facilities now have until October 30, 2026, to submit their reports, an extension from the original deadline.

EPA Revises Pyridate Pesticide Tolerances

The Environmental Protection Agency (EPA) has published a final rule revising tolerances for the pesticide pyridate. This action amends existing regulations regarding pesticide residue limits on various crops, impacting food manufacturers and agricultural firms.

EPA Proposes Michigan Air Rules for VOC/NOx RACT

The Environmental Protection Agency (EPA) has proposed new air quality rules for Michigan concerning Reasonably Available Control Technology (RACT) for Volatile Organic Compounds (VOC) and Nitrogen Oxides (NOx) related to the 2015 ozone standards. The proposal is open for public comment until March 30, 2026.

NIST Report on Adjoint Methods for Sensitivity Analysis

The National Institute of Standards and Technology (NIST) has published a report detailing the physical interpretation of adjoint methods for sensitivity analysis in computational modeling. This document, Part I of a series, aims to demystify the adjoint method for engineers and scientists by grounding it in physical principles.

Automated Polymer Library for Materials Science Literature Curation

NIST has published a notice detailing an automated approach to curating materials science literature, specifically for dynamic polymers. This method aims to streamline data extraction for AI model training and trend identification in materials science research.

Influence of Ligament Size on Charpy Impact Test Results

NIST published a study on the influence of ligament size and tolerances on Charpy impact test results. The study supports a proposal to revise ASTM standards to align with ISO 148-1 regarding ligament length specifications.