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Energy & environment · 12/11/2024Updated: 10/16/2026 · 1 min read

EPA Proposes Revision to VOC Definition, Excluding HCFO-1224yd(Z)

Summary

The U.S. Environmental Protection Agency (EPA) is proposing to revise its regulatory definition of volatile organic compounds (VOC) under the Clean Air Act, excluding (Z)-1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(Z)).

Original source language: Federal Register — Environmental Protection AgencyOpen original release →

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Energy & environment · 5/29/2026

EPA Approves Revisions to California Air Pollution Control Districts

The Environmental Protection Agency (EPA) has taken final action to approve revisions to the San Joaquin Valley Unified Air Pollution Control District, Ventura County Air Pollution Control District, and South Coast Air Quality Management District portions of the California State Implementation Plan, regulating emissions of volatile organic compounds from crude oil and natural gas production facilities.

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Energy & environment · 5/29/2026

Air Plan Approval; Indiana; Keystone VOC RACT Alternative Control

The Environmental Protection Agency (EPA) is approving revisions to the volatile organic compound (VOC) requirements for Keystone Automotives Industries dba Saturn Wheel (Keystone) in Indiana, following a Commissioner's Order submitted by the Indiana Department of Environmental Management (IDEM). The EPA proposed approval on February 27, 2026, after receiving no adverse comments.

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Energy & environment · 5/28/2026

Air Plan Approval; SC; Department Name Change

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of South Carolina on July 23, 2025, to update department references following a restructuring of the South Carolina Department of Health and Environmental Control.

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