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Agricultural Insurance

Combustible Dust: The Ignored Hazard and Hidden Cost in Agribusiness

Ryan Lay | May 15, 2026

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billows of smoke and dust coming from a refinery after an explosion

When most people think of an agribusiness claim, loss of revenue is the first thing that comes to mind. But with complex operations, the hidden cost can go beyond financial implications and even result in death. For example, a dust-related explosion in Texas of 2025 claimed the life of 1 individual, critically injured 3 others, and was eerily reminiscent of the infamous 2008 Imperial Sugar refinery explosion that killed 14.

These types of events can leave lasting impressions on loss control specialists and stick with them throughout their career. When lives are involved, it is essential to learn from the aftermath and prevent other instances from occurring.

What Challenges Does Agribusiness Pose to Property Insurance?

Agribusiness is a key contributor to our overall success as a society but continues to present significant challenges to the property insurance market. Agribusinesses span a wide range of operations, each with unique risk profiles, machinery, and hazards. Due to their complexity, they are notoriously difficult to secure property coverage for, especially for operations that involve the hazard of producing combustible dust. Given the historical severity of losses, this is understandably so.

Based on April 2026 Occupational Safety and Health Administration (OSHA) inspection data and safety updates, combustible dust explosions remain a significant concern, particularly in agriculture, biofuel, and wood-processing facilities. Operations face a real dilemma, only exacerbated by their reluctance to conform to best practices and fire protection standards because of the cost. Not only can high-performing safety equipment be expensive, but downtime for installation and training is often not prioritized.

In a hardening insurance market, risk profiles containing combustible dust, such as feed mills, flour mills, grain elevators, nut processing facilities, and oilseed processing facilities, are particularly vulnerable and, therefore, subjected to increased rates.

All of this culminates in a vicious cycle where agribusiness owners avoid safety standards to reduce costs, which inevitably leads to a catastrophic event that raises pricing for the entire industry. That's where loss control comes in. By adhering to best practices set by the National Fire Protection Association (NFPA), agribusiness owners with combustible dust in their operations can take the first step in building a more resilient sector.

NFPA 660, the Standard of Combustible Dusts and Particulate Solids

The NFPA's new Standard for Combustible Dusts and Particulate Solids (NFPA 660) became active on December 6, 2024, and covers industries from agricultural to metal and wood processing. It replaced the NFPA 61, 484, 652, 654, 655, and 664 to provide new standards for handling combustible dusts. Businesses should familiarize themselves with changes and the impact on their operations in order to ensure compliance.

NFPA 660 Key Requirements and Changes

  • Dust hazard analysis (DHA)
    • Under the NFPA 660, conducting a DHA is a critical foundation of any safety plan and contains several important steps. For example, a flour mill that produces flour dust would do the following.
      • Identify hazards. Identify potential explosion zones.
      • Assess ignition points. Review potential ignition sources, including static electricity, hot bearings, and friction.
      • Map dust accumulation. Identify all areas where dust would accumulate.
      • Evaluate safeguards. Inspect explosion venting on dust collectors, grounding of equipment, and cleaning procedures.
      • Adhere to risk reduction recommendations. Install dust collection systems, add suppression systems, and improve cleaning schedules.
  • Hazard mitigation strategies
    • Dust collection systems play a critical role in mitigating combustible dust risks. Risk management strategies should be interconnected, drawing from multiple approaches to keep facilities safe. Best practices include the following.
      • Control ignition sources.
      • Implement ventilation improvements.
      • Perform regular maintenance on dust collection systems and equipment.
      • Routinely inspect and maintain critical equipment and electrical systems in accordance with the NFPA 70 and 70B.
      • Improve housekeeping measures.
  • Training and improved safety measures
    • The NFPA 660 outlines improved safety guidelines that must be followed.
      • Chapter 10 of the NFPA 660, which is the standard, places strong emphasis on program management and requires a written dust hazard management program along with documented training and inspections.
      • Develop and implement a robust Emergency Action Plan (EAP).
      • Insulate spark detection devices, flame arrestors, and automatic suppression systems. The implementation of the new standard represents a better chapter in fire safety and should be followed along with the NFPA 68, 69, and 499 to protect assets, ensure employee safety, and lower business costs.

Hidden Costs of an Explosion

According to the US Small Business Administration and Federal Emergency Management Agency data, nearly 40 percent to 90 percent of small businesses never reopen after a disaster, 25 percent fail within 1 year, and up to 75 percent of businesses without a continuity plan fail within 3 years of a disaster.

Combustible dust disasters (grain, sugar, flour, etc.) tend to be high-severity, low-frequency events, and insurers price heavily because of the severity. Various factors play into the overall cost placed on operations that have this component in their businesses. According to OSHA inspection data over the last 10 years, multiple loss events resulted in over $100,000 in fines. A staggering $3.7 million fine followed the Imperial Sugar refinery explosion in 2008.

Also, fines are not the only costs connected with catastrophic explosions.

Injured Workforce

  • Based on the National Safety Council (NSC) data, burns are among the most expensive lost-time workplace injuries. The average cost of burn care is between $52,000 and $64,000.
  • Severe burn injuries typically require weeks, if not months, in a burn unit.
  • Based on 2023–2024 data provided by the NSC, a workplace fatality is approximately $1.5 million.

Loss Production

  • Damaged production equipment can have long wait times for repair or replacement, resulting in operational downtime. For example, industrial dust collectors frequently explode; however, most businesses don't have a spare available on-site.

Lawsuits

  • Lawsuits are potentially the most expensive cost linked with dust-related explosions; injured employees and their families may seek financial restitution for injuries or damages. The average employment-related lawsuit, according to the NSC, costs the company around $41,000–$47,000 per claim.
  • If the injuries are a result of negligence in a personal injury lawsuit, costs can exceed $1 million.

Increased Insurance Premiums

  • Loss history and litigation continue to play a large role within the insurance world, and large verdicts and settlements following explosions have increased insurers' loss reserves notably. Even one high-profile case can impact pricing across the entire agribusiness landscape.
  • Reinsurance costs are rising across the board, and operations with combustible dust hazards are particularly affected. Insurers normally pass this cost along to their various commercial and industrial clients.
  • Fewer insurers are writing combustible dust risks, which creates a supply-demand imbalance. This is exactly why insurers price the risk the way they do. Operations within the agribusiness sector deal with these pressures consistently, but costs can be controlled. With the adoption of the NFPA 660, businesses can prove they prioritize risk control, and the implementation of these safety measures can lead to improved pricing and terms.

Conclusion

The bottom line is straightforward: Any operation that has a combustible dust component will continue to see higher operating costs until the industry's attitude changes. With an average of eight catastrophic explosions annually and repeated "willful" violations from OSHA, the emphasis on safety is too lax.

Businesses and experts in the fire safety realm have an opportunity to break the cycle. With the implementation of the NFPA 660, the Combustible Dust National Emphasis Program, and an emphasis on training, costs and safety can be improved.


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