For the past 10 years, the National Fire Protection Association (NFPA)  has been working to consolidate several industry-specific standards for combustible dust. In December 2024, the NFPA completed its goal by issuing “NFPA 660–Standard for Combustible Dusts and Particulate Solids.” This new standard combines six existing standards, including NFPA 61 (agricultural dust) and NFPA 664 (wood dust), into a single standard that covers all industries where combustible dust and particulates are generated, used and handled. Building permitting authorities, code enforcers and fire agencies use the NFPA standards to establish the basis of design and operation for new and existing industrial sites, so it’s important for pellet mill owners and operators to be aware of NFPA requirements, especially for new projects and plant modifications. NFPA 660 covers both administrative and engineering requirements at facilities with combustible dust, and its goal is to minimize fires and explosions, help companies maintain business continuity, and, most importantly, protect workers and the public.