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Wastewater Safety on Farms

Farm wastewater comes from milking parlors, wash areas, feedlots and processing, and it creates more than one kind of hazard. Knowing the categories helps you plan prevention and know when to call in help.

What counts as farm wastewater?

Wastewater on a farm can include parlor and milkhouse wash water, runoff from lots and barns, process water from produce washing, and liquid from manure handling. It may sit in tanks, pits, lagoons, ditches or settling basins, and each setup creates different risks.

Because every operation is different, start by listing where liquid waste is stored or moves on your property. You cannot manage a hazard you have not identified, and this list becomes the starting point for signs, fencing, training and inspection.

What are the main hazards?

Three broad groups matter. First, physical hazards: falls into tanks and pits, slippery edges, unstable banks and drowning. Second, air hazards: stored waste can release gases and reduce breathable air in enclosed or low spaces. Third, health hazards: contact with wastewater can spread germs and irritate skin and eyes.

This article describes the hazards only in general terms. Exposure limits, detection methods and protective equipment specifications come from OSHA, NIOSH and the equipment manufacturer, and they should never be guessed or recalled from memory.

• Falls and drowning at open or poorly covered storage.
• Hazardous air in pits, tanks and enclosed spaces.
• Germs and irritants from direct contact.
• Slips on wet, muddy or frozen surfaces.

How do you keep people away from the hazard?

Controlling access is the heart of prevention. Covers, grates, railings, fencing and locked gates keep people and animals out. Signs add a warning, and a clear farm rule that children and visitors never go near wastewater storage adds a human layer.

Check every opening and edge. A cover that is cracked, rusted or not fully seated can fail under weight. Replace or repair damaged covers promptly, and ask a qualified professional if you are unsure whether a structure is sound.

What about confined spaces?

Tanks, pits and similar enclosed structures can be confined spaces, and they have caused serious harm to workers and to would-be rescuers. The safe approach is to stay out unless the entry is truly necessary, planned and carried out under a formal program with trained people and proper equipment.

OSHA is the authority on confined space rules, and the agency maintains guidance that applies to agriculture and general industry. Visit the OSHA site or call your area office to learn what applies to your operation. If someone collapses or falls in, call 911 and do not enter to attempt a rescue.

How do you protect health when working with wastewater?

Basic hygiene reduces illness risk: wash hands and forearms thoroughly after any contact, keep food and drink away from work areas, and clean and cover cuts before work. Change out of soiled clothing and keep work clothes separate from the family laundry where you can.

Gloves, boots and eye protection are commonly recommended for wet jobs, but the right type depends on the task. Check manufacturer information and guidance from your extension office or AgriSafe before choosing. If someone develops symptoms after exposure, contact a health care provider and mention the farm work.

• Wash thoroughly after contact.
• Keep food and drink out of the work area.
• Cover cuts before work.
• Tell a clinician about wastewater exposure if you feel ill.

How do you build wastewater safety into the farm routine?

Write down the rules in a short plan: where storage is, who may go near it, what training is required, who inspects it and how often. Review the plan with everyone who works on the farm, including seasonal and part-time help, and revisit it after any change in equipment or layout.

Pair the plan with an annual walkthrough that looks at covers, fences, signs, access lanes and drainage. Involve your extension agent, your state environmental agency and your insurer, since each may have requirements or advice specific to your location.

What should you ask outside experts?

Bring specific questions to your extension office, your state environmental agency and your insurer. Ask what rules apply to storage and discharge of farm wastewater where you farm, what inspections are expected and what training is recommended for people who work near it.

Ask a fire department or emergency manager to look at your site and advise on access for responders. A short visit before an emergency can save minutes during one, and it builds a relationship that helps if you ever need to call.

Write down what you learn and share it with everyone who works on the farm, including seasonal helpers who may not have heard the rules.

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