Agriculture is the greatest use of groundwater worldwide, and it’s not close. Irrigation alone accounts for about 70% of all freshwater withdrawals globally, and groundwater supplies roughly 25% of the water used for that irrigation. The remaining groundwater goes to domestic use (drinking water, cooking, sanitation) and industrial purposes like manufacturing, mining, and energy production.
Agriculture Dominates Groundwater Use
Farming consumes more groundwater than any other human activity on the planet. Globally, agriculture accounts for about 70% of all freshwater withdrawals, with industry taking just under 20% and domestic use around 12%. Within that agricultural share, groundwater is critical: it supplies a quarter of all irrigation water worldwide, feeding crops in regions where rivers and reservoirs can’t keep up with demand.
In the United States, the pattern is even more pronounced. Fresh groundwater withdrawals totaled about 82,300 million gallons per day in 2015, and irrigation accounted for 70% of that. The heaviest use concentrated in California, Arkansas, Nebraska, Idaho, and Texas. Irrigation consumed more than three times the groundwater used by public water suppliers, which was the next largest category.
India, the world’s single largest consumer of groundwater, pushes the ratio even further. Agriculture accounts for roughly 90% of India’s annual groundwater usage, supporting more than 60% of the country’s irrigation needs. The remaining groundwater fulfills between 50% and 80% of domestic water needs depending on the region.
Which Crops Use the Most Groundwater
Not all farming pulls equally from underground sources. In the continental United States, animal feed crops like hay and alfalfa are the largest overall irrigation water users, responsible for about 35% of total irrigation water use across all sources. But the picture shifts when you look specifically at groundwater withdrawals. Soybeans are the single largest driver of groundwater pumping by volume, followed by wheat, corn, rice, cotton, and barley.
Cotton stands out in a different way: it’s the leading crop responsible for groundwater depletion, meaning it draws water faster than aquifers can recharge. Rice is another heavy hitter, particularly in the Mississippi Embayment region of the southern U.S., where rice and soy production depend heavily on underground water. These crops thrive in areas where rainfall alone isn’t sufficient, making groundwater the difference between a harvest and a failed season.
Drinking Water Is the Second Largest Use
About half of the world’s domestic water now comes from groundwater. That includes drinking water, cooking, bathing, and sanitation for billions of people. In the United States, public water suppliers withdrew about 15,200 million gallons per day from groundwater sources in 2015, making public supply the second largest category after irrigation.
For rural communities and smaller towns that lack access to large surface water systems, groundwater is often the only reliable source. Many of these communities draw directly from wells rather than municipal treatment plants, making aquifer health a direct concern for household water quality.
Industrial and Energy Uses
Industry accounts for just under 20% of global freshwater withdrawals, though the share that comes specifically from groundwater varies by region and sector. Manufacturing, mining, oil and gas extraction, energy generation, and construction all tap underground sources. The beverage and bottled water industries are a unique case: groundwater isn’t just a utility for them, it’s the actual product.
Mining operations are particularly groundwater-intensive. Mineral extraction and processing require large volumes of water, and mines located far from surface water sources rely almost entirely on wells. Energy generation also draws on groundwater for cooling, though this use is more common in areas without access to rivers or lakes.
Why This Matters: Aquifer Depletion
The fact that agriculture dominates groundwater use has direct consequences for the world’s major aquifers. The High Plains aquifer in the central United States, which includes the well-known Ogallala aquifer, underlies parts of eight states and has been intensively developed for irrigation. Since large-scale pumping began, water levels have dropped more than 100 feet in some areas, and the saturated thickness of the aquifer has been cut by more than half in others.
This isn’t a problem limited to the American Midwest. India’s groundwater tables are falling in many agricultural regions, and the North China Plain faces similar pressure from crop irrigation. The common thread is the same everywhere: farming pulls water out of aquifers far faster than rain and snowmelt can refill them. Underground water that accumulated over thousands of years is being consumed in decades.
The scale of the imbalance is striking. When 70% of groundwater goes to irrigation and the aquifers supplying it are shrinking, the long-term math creates a collision between food production and water availability. Regions that built their agricultural economies on cheap, abundant groundwater are now confronting the reality that the supply is finite.