Agricultural Chemical Hazmat Incidents
Anhydrous ammonia, pesticide storage, fertilizer fires, rural tanks, and contaminated runoff at farms, cooperatives, greenhouses, and storage sites.
What This Incident Looks Like
Agricultural hazmat calls often begin as a rural fire, medical call, odor complaint, or leaking nurse tank. The hazards can be scattered across a property: pesticide storage, fertilizer, diesel, propane, ammonia nurse tanks, seed treatment chemicals, compressed cylinders, silos, pits, and contaminated runoff. Distance, water supply, access, weather, and delayed hazmat resources make early isolation and defensive decision-making especially important.
Anhydrous ammonia deserves special attention because it is common in agriculture and can cause severe respiratory and caustic injury. Pesticide and fertilizer storage fires create a different problem: smoke toxicity, runoff, container failure, and incompatible products mixed by fire streams. The first-due goal is to recognize the agricultural context, keep crews out of vapor and runoff, identify products from a distance, and bring in hazmat, environmental, agricultural, and facility contacts early.
Recognition Clues
- Nurse tanks, ammonia odor, frost on valves, white vapor cloud, or distressed people downwind
- Pesticide sheds, fertilizer storage, seed treatment areas, drums, totes, and mixed agricultural containers
- Fire near tanks, cylinders, pesticide storage, oxidizers, or runoff flowing toward ditches and waterways
- Farm workers reporting chemical application, mixing, transfer, or equipment failure
First-Due Actions
- Approach from uphill/upwind and use binoculars or remote information before entering the farmyard or storage area
- Set isolation early; rural scenes can spread through drainage, low areas, and wind-driven vapor
- Identify products through labels, shipping papers, SDS, farm staff, supplier contacts, or ERG lookup
- Protect waterways and runoff pathways while avoiding unsafe close-range product control
- Request hazmat resources, environmental agency notification, EMS, law enforcement, and utility support as needed
Do Not
- Do not enter an ammonia vapor cloud without appropriate training, monitoring, and PPE
- Do not assume water is safe for every agricultural chemical or fertilizer fire
- Do not allow contaminated runoff to enter ditches, ponds, storm drains, or wells without control efforts
- Do not let exposed workers leave before medical evaluation and decon decisions are made
Related References
Official Sources
Official sources are linked for verification. This page is a firefighter training reference, not legal or medical advice.