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Changes to U.S. EPA PFAS Drinking Water Standards Under the Trump Administration

Posted: July 2025

In April 2024, the United States Environmental Protection Agency (U.S. EPA) finalized Maximum Contaminant Levels (MCL) for five per- and polyfluoroalkyl substances (PFAS): perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorohexanesulfonic acid (PFHxS), perfluorononanoic acid (PFNA), and hexafluoropropylene oxide dimer acid […]

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PFAS: State-by-State Regulatory Update (March 2025 Revision)

Posted: March 2025

Welcome back to the 2025 edition of the ALL4 state-by-state per- and polyfluoroalkyl substances (PFAS) update. A lot has changed over the past year in both the federal and state regulatory landscape. The U.S. Environmental Protection Agency (U.S. EPA) has […]

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U.S. Power Sector: Looking Ahead to 2025

Posted: January 2025

The power sector in the United States is poised to change significantly in the next 25 years. The rate of power generation has remained relatively flat over the past 20 years, largely due to the wide scale deployment of residential […]

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Energy Efficiency, a First Step Toward Decarbonization

Posted: October 2024

Three weeks ago, I had the pleasure of representing ALL4 at the Association of Energy Engineers (AEE) World Energy Conference, in Nashville, Tennessee. It was great to spend time with other Certified Energy Managers and energy industry professionals, talking about […]

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Indoor Heat Illness Prevention

Posted: August 2024

Background  In 2006, California Division of Occupational Safety and Health (Cal OSHA) implemented a heat illness prevention for outdoor workplaces (California Code of Regulations (CCR), Title 8, section 3395).  Less than 10 years later, on June 20, 2024, Cal OSHA […]

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U.S. EPA Releases EJSCREEN v.2.3

Posted: July 2024

On July 9, 2024, The United States Environmental Protection Agency (U.S. EPA) released an update of its environmental justice (EJ) screening tool, EJSCREEN version 2.3. The revised tool adds new map layers and two new EJ Indexes, along with reports […]

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