
by Robert Marcos
There’s a 33-to-1 disparity in the cost of Colorado River water that’s being utilized by the residents of San Diego, versus the residents of Brawley – both of which are in Southern California and are just 97 miles away from each other. The disparity stems from differences in two primary areas: water rights and conveyance. San Diego’s municipal water rates – which are the fourth highest for a major city in the United States, are also inflated by the city’s massive investment in recycling and desalination.
Brawley’s Senior Water Rights
Residents of Brawley are served by the Imperial Irrigation District, which holds some of the most senior water rights on the Colorado River, in particular among major users. The IIDs rights predate the 1922 Colorado River Compact and fall under “present perfected rights” which make them an exceptionally high-priority. The IID holds rights to approximately 3.1 million acre-feet of Colorado River water annually, making them the largest single user of Colorado River water.1
It’s also worth noting that the IID pays nothing for the 3.1 million acre feet of water they’re entitled to. They do however pay multiple-millions of dollars for the operation and maintenance of California’s Imperial Dam, and the All-American Canal. Farmers and residents of the Imperial Valley pay only $20 per acre-foot for the water itself, since they only need to cover local delivery costs.2 Meanwhile San Diego, which does not have senior rights must buy water at market rates. Beginning in 2026 San Diego pays the Metropolitan Water District $671 per acre-foot of waterโ33 times what Brawley pays for the same water.
Infrastructure and Transportation
The city of Brawley is adjacent to the All-American Canal, so it requires a minimal amount of infrastructure to move the water into town. Whereas San Diego’s imported water utilizes two large canal systems: The Edmund G. Brown California Aqueduct from the State Water Project, and the Colorado Aqueduct that travels 242 miles from Lake Havasu in the east. San Diego – in the face of chronic drought and the increased stress of climate change on imported water sources, has made long-term commitments to making water conservation a permanent way of life. Historically dependent on importing up to 90% of its water from the Colorado River and Northern California, the region is now aggressively diversifying its water portfolio to ensure sustainability: aiming to reduce demand through mandated restrictions, turf replacement programs, and widespread public education.
San Diego is preparing for a drier future
San Diego has launched massive and innovative infrastructure projects, most notably the “Pure Water San Diego” program which aims to produce nearly half of the city’s water locally by 2035, with the use of advanced water purification technology that will convert recycled wastewater into high-quality drinking water.
In 2015 the region pioneered the use of desalination with the Claude “Bud” Lewis Carlsbad Desalination Plant, which is the largest desalination plant in the United States. The plant produces up to 54 million gallons of high-quality drinking water per day, which is about 10% of the water San Diego needs, at a cost of about $3,800 per acre foot.
But the stability that these projects promise comes at a high price. Residents who were already frustrated with high energy bills now face skyrocketing water bills too. Water rates in San Diego have seen steep increases, with projections showing a 14.7% hike in 2026, followed by another 14.5% in 2027. These are largely to pay for the Pure Water program in addition to higher costs for imported water. Residents and critics have expressed frustration that water rates could rise by 44% over four years, causing many to question the rising cost of living in the region.



















































































































































































