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Fertilizer Safety Basics

Fertilizers are part of everyday farming, and they carry real hazards for people, animals and water. This guide covers general safety ideas, with product-specific instructions left to labels and official sources.

Why does fertilizer safety matter?

Fertilizers can irritate skin and eyes, harm lungs if dust or vapors are breathed, and cause serious problems if swallowed. Some forms are stored under pressure or can contribute to fire or explosion risks if mishandled. Spills and runoff can also harm water.

Because the products are so familiar, people can get casual with them. Treat each product with respect, and learn what is specific to what you use.

Fertilizer dust and fumes can build up in enclosed spaces. Do not enter a closed bin, tank or pit without proper training and procedures, and call 911 in an emergency.

• Skin and eye irritation
• Breathing problems from dust or fumes
• Fire and reaction risks with some products
• Runoff into water

Where do I find product-specific safety information?

Start with the label or bag and the safety data sheet, which describes hazards, handling, storage and emergency measures. Keep sheets accessible to workers and responders. Ask your supplier for any you do not have.

For specific hazards such as pressurized products or reactive materials, ask your state agency, extension office and OSHA, and seek recognized hands-on training. This site does not give technical thresholds or procedures.

Safety data sheets have sections on hazards, handling and emergency measures. Take a few minutes to read the sections that apply to the work you will do each season.

• Label or bag
• Safety data sheet
• State agency and extension guidance

How should fertilizer be stored?

Keep products dry, labeled and separate from pesticides, fuel, feed and seed as the safety data sheet advises. Provide good ventilation and keep storage away from drains, wells and water. Some fertilizers react with other materials, so ask before you store them together.

Tell your fire department what you store and where, and ask about their recommendations for your site.

• Dry, ventilated and labeled
• Separate from fuels, pesticides and feed
• Away from wells, drains and water
• Known to the local fire department

What habits reduce harm during handling?

Wear the protective equipment that the label and data sheet call for, avoid raising dust and avoid working alone with hazardous products. Wash hands and change clothes after work.

Use equipment that is in good repair and keep spreaders and tanks calibrated so that you apply what you intended and not more.

Keep bystanders and children away when loading and spreading. Dust or spills can travel farther than expected.

• Wear the protective equipment the data sheet calls for.
• Avoid raising dust.
• Do not work alone with hazardous products.
• Wash up and change clothes afterward.

How do I prevent runoff and water problems?

Applying more than a crop needs, or applying before heavy rain or on frozen or saturated ground, can send nutrients into waterways. Ask your extension office about nutrient management planning, soil testing and local rules.

Keep fill and mixing areas away from wells and surface water, and clean up spills promptly.

Soil tests and a nutrient plan help you apply the right amount at the right time, which is safer for water and often better for your budget.

• Avoid applying before heavy rain or on frozen or saturated ground unless local guidance says otherwise.
• Use soil tests to set rates.
• Keep mixing areas away from wells and water.

What about special hazards?

Some products, such as anhydrous ammonia, liquid manure systems and certain dry products, bring hazards that call for specific training. Gas, pressure and confined space dangers are serious, and this site does not describe procedures for them.

Learn from official materials and from hands-on training. In an emergency, call 911.

• Anhydrous ammonia
• Liquid manure systems and gases
• Pressurized tanks and fittings
• Confined spaces such as bins and pits

Who can help?

Extension nutrient management specialists, your state agriculture department, OSHA and NIOSH offer materials on fertilizer safety. Your supplier and your insurer may also provide guidance.

Hold a short safety talk with workers each season, using the data sheets for products you actually use.

Tell your insurance provider and your fire department about large storage. They may have requirements or suggestions you would not otherwise hear about.

• Extension nutrient management specialists
• State agriculture department
• OSHA and NIOSH materials

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.