Approximately what percentage of California's water supply is used for agricultural purposes?

California is known for its significant agricultural output, which relies heavily on the state's water resources. Approximately 80% of California's water supply is utilized for agricultural purposes. This substantial percentage is primarily due to the state's extensive farming activities and the need for irrigation in its diverse range of crops, including fruits, vegetables, and nuts. Agriculture in California is a major economic driver, which necessitates a large portion of the state’s water supply to sustain production.

The incorrect options do not accurately capture the proportion of water used for agricultural purposes in California. For instance, while 40%, 60%, or 90% significantly under- or overstate the actual share of agricultural water use, the 80% figure illustrates the critical role that agriculture plays in the state's overall water consumption. This reliance underscores the continuous dialogue about water management, conservation, and sustainability strategies necessary to balance agricultural needs with urban demands and environmental conservation efforts in California.