How much water does your herd need?

By: Ritchie Industries

Hydration needs vary dramatically between beef and dairy operations. But there’s a lot more to it than beef vs. dairy. Those needs vary even more when you’re talking about different seasons and stages of life. Calves, lactating cows and finishing cattle in summer heat all have different hydration needs. Understanding those changing demands can help support performance, health and water needs year-round.

Download a quick reference guide here.

Here you’ll find answers to some of the most common questions producers ask about cattle hydration.

How do water needs change throughout an animal’s life?

Water needs change with every stage of life and then vary by breed and the environment. Here’s a general guide to the ranges of water needs per animal type.

WATER INTAKE BY ANIMAL TYPE
Animal	Average daily water intake
Lactating dairy cow	30-50 gal (113.56-189.27 L)
Calves	2-5 gal (7.57-18.93 L)
Bulls	10-20 gal (37.85-75.71 L)

How does temperature affect cattle water intake?

During the summer months, animals work harder to regulate body temperature and maintain feed intake and performance — and the threat of heat stress is high. Factors like humidity, sun exposure, stage of production and diet all influence consumption, but it’s common for cattle to drink substantially more water during periods of hot weather. The chart below shows how water needs can change as temperatures climb.

Temperature	Dairy Cow Water Intake
20ºF (-6ºC)	15-20 gal/day (56.78-75.71 L/day)
40ºF (4ºC)	20-25 gal/day (75.71-94.64 L)/day)
60ºF (16ºC)	25-30 gal/day (94.64-113.56 L/day)
80ºF (27ºC)	30-40 gal/day (113.56 L-151.41 L/day)
90ºF+ (32ºC)	40-50 gal/day (151.41-189.27 L/day)

Air temperature isn’t the only factor that affects water consumption. According to the University of Tennessee Institute of Agriculture, if the water temperature is greater than 80ºF, cattle are less likely to drink it. If possible, place waterers under shade structures to keep the water cool.

What is the impact of clean water access on cattle performance?

The quality of the water cattle drink has a significant influence on their performance because it drives nearly every function within the animal. Feed digestibility, milk production, weight gain and reproduction all depend on water. And it sets the animal’s metabolism rate.

Have you tested the quality of water your herd is drinking? Many producers haven’t. Here are some water quality guidelines. Check with your vet, nutritionist or local department of natural resources about testing your water.

WATER QUALITY GUIDELINES FOR CATTLE
Contaminant	Safe Levels
Total dissolved solids	< 3,000 ppm
Sulfates	< 500 ppm
Nitrates	< 100 ppm
pH	6.0-8.5

Frequently asked questions about dairy cattle hydration

How much water do lactating cows need?

Lactating dairy cows require approximately 0.54–0.60 gallons of water* per pound of milk produced. So, for example, a cow producing 100 pounds of milk daily could consume as much as 50 gallons (189.27 L) of water, according to the University of Nebraska Extension.

Why do dairy cattle require so much water?

Dairy cows need so much water because water plays a direct role in both milk production and feed intake. Milk itself is made up of nearly 87% water, so high-producing dairy cows require large amounts of water every day to support consistent milk production. As milk output increases, water demand rises alongside it.

Water intake is also closely tied to dry matter intake. Dairy cows that consume more feed require more water to properly digest and utilize nutrients, maintain rumen function and support overall health and production. If water consumption is limited — whether due to heat stress, poor water quality or inadequate access — feed intake often declines first, followed by reduced milk production and performance.

What happens if dairy cows don’t consume enough water?

If dairy cows don’t drink enough water, you’ll see lower feed intake, which will impact their health and performance with reduced milk production. Lower consumption of water will also increase cows’ risk of heat stress.

Does fresh water increase milk production in dairy cows?

According to the University of Nebraska – Lincoln, providing insufficient water or water of poor quality to dairy cattle can limit milk production and growth, and cause health problems. An adequate supply of clean water promotes normal rumen function, high feed intake, digestion and nutrient absorption. For guidance on water quality, see our Water Quality Guidelines for Cattle chart above.

Where should waterers be placed in dairy facilities?

You’ll want to consider the traffic flow in your facility and areas that will reduce competition for water. Placing waterers near the parlor and feed bunks is always a good idea.

What should producers look for in a watering system?

When you’re looking for the best automatic waterers for your operation, reliability and cleanability in any season are important. And you’ll want to match water capacity and flow rate to your herd’s needs. This chart is a great guide.

WATER CAPACITY AND FLOW RATE BY HERD SIZE
Herd Size	Minimum Water Capacity	Recommended Water-Flow Rate
25 head	200-300 gal/day (757.08-1,135.62 L/day)	3-5 gal/min (11.36-18.93 L/min)
50 head	400-600 gal/day (1,514.16-2,271.25 L/day)	5-8 gal/min (18.93-30.28 L/min)
100 head	800-1,200 gal/day (3,028.33-4,542.49 L/day)	8-12 gal/min (30.28-45.42 L/min)
200 head	1,600-2,400 gal/day (6,056.66-9,084.99 L/day)	12-20 gal/min (45.42-75.71 L/min)

Whatever your operation demands, there’s a Ritchie designed to deliver clean, fresh water every time. Your Ritchie dealer can help find the right waterers for your needs.