How much water does a horse need per day from a well?

Horses typically need 10-15 gallons of water per day under normal conditions. During hot weather, heavy work, or lactation, this can increase to 20-25 gallons daily. A well for a single horse should produce at least 1 GPM, while a small ranch with 5-10 horses needs 5-10 GPM minimum to meet daily demands with adequate recovery time.

What GPM well do I need for cattle?

For cattle operations, plan for 1-2 GPM per head of cattle. A small herd of 20 beef cattle requires a well producing at least 20-30 GPM. Dairy cattle need more water—up to 50 gallons per cow daily—so a 50-head dairy operation may need 75-100 GPM capacity, especially during summer months when consumption peaks.

Is well water safe for livestock?

Well water is generally safe for livestock, but should be tested annually for nitrates, bacteria, TDS (total dissolved solids), and sulfates. Livestock can tolerate higher TDS levels than humans (up to 5,000-7,000 ppm for cattle), but high nitrates above 100 ppm can cause health problems. Iron and sulfur, while affecting taste, are usually not harmful to animals.

How do I size a well for a small ranch with mixed livestock?

Calculate total daily water needs by adding requirements for each animal type, then divide by available pumping hours to get required GPM. For example: 5 horses (75 gal) + 10 cattle (400 gal) + 20 goats (60 gal) + 50 chickens (12.5 gal) = 547.5 gallons daily. Pumping 4 hours/day requires approximately 2.3 GPM minimum. Add 50% buffer for peak demand, so target 5 GPM.

What backup water supply do I need for livestock?

Livestock operations should maintain 3-7 days of water storage as backup. For 20 cattle (800 gal/day), this means 2,400-5,600 gallons of storage. Options include above-ground poly tanks ($1-2/gallon capacity), concrete cisterns, or multiple wells. Also consider a backup generator for your well pump—livestock cannot survive more than 2-3 days without water.

Livestock Well Water Needs: How Many GPM for Cattle, Horses & Farms?

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