Hazardous Matters is PHMSA's quarterly newsletter for hazardous materials safety. Every quarter, this publication consolidates timely information on our latest rulemaking activities, upcoming workshops and webinars, newest publications, and other highlights from PHMSA's current safety initiatives.

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Read the current issue: October 2025 – March 2026: Special Double Issue

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July-September 2022: Special Issue on Lithium Batteries

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October - December 2021