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Historic First Aqueduct-asset management-Pipeline 1-maintenance

First Aqueduct Maintenance Shutdown Runs Jan. 23-Feb. 1

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The San Diego County Water Authority’s First Aqueduct will be shut down periodically over the next three months for maintenance projects to ensure a safe and reliable water supply for the region. Two shutdowns on the First Aqueduct are scheduled from January through March, when portions of the aqueduct will be relined, along with other maintenance.

The Water Authority and its member agencies are coordinating to minimize impacts to residents and businesses, while servicing pipelines that are more than 65 years old.

Customers of these affected retail agencies during the Jan. 23-Feb. 1 shutdown should check with their local water utility if they have questions about localized impacts: Fallbrook Public Utility District, Rainbow Municipal Water District, Rincon del Diablo Municipal Water District, Vallecitos Water District, Valley Center Municipal Water District, Vista Irrigation District, and the Yuima Municipal Water District.

Proactive Asset Management Program

“Work to proactively upgrade and maintain our water delivery system in coordination with our member agencies ensures the continued safe and reliable supply that serves the region’s 3.3 million residents and our $268 billion economy,” said Eva Plajzer, the Water Authority’s director of operations and maintenance. “Taking care of this critical infrastructure during the shutdown season extends the life of the aqueduct and reduces the cost of replacement.”

Maintenance shutdown during low-demand periods

Maintenance work on pipelines is scheduled during low-demand periods to minimize impacts on water service.

The other scheduled shutdown on the First Aqueduct is February 27 to March 8, which will also impact the Helix Water District and the cities of San Diego, Poway and Ramona.

First Aqueduct-Asset Management-Historic First Aqueduct-Shutdown

By order of President Franklin D. Roosevelt, the U.S. Navy built the San Diego Aqueduct to deliver Colorado River water to San Diego. Photo: San Diego County Water Authority archives

Historic First Aqueduct

The historic First Aqueduct was constructed in the 1940s with Pipeline 1 and in the 1950s with Pipeline 2. On November 28, 1947, the first Colorado River water flowed south from Riverside County for 71 miles into the City of San Diego’s San Vicente Reservoir via the First Aqueduct.

The Water Authority’s Asset Management Program is a key element of providing safe and reliable water supplies to the region. The agency continually assesses and inspects its 310 miles of large-diameter pipelines, which provide treated and untreated water to 24 member agencies in San Diego County. The program is widely recognized for pioneering work – including a patented inspection device – that promotes water affordability by avoiding costly unplanned disruptions in service.

As assets age, the Water Authority proactively replaces and repairs them to minimize impacts to member agencies and the public. Investments in the latest inspection technologies, including electromagnetic scanning, robotic inspections and 3D tunnel inspections help the Water Authority’s asset management team detect defects in pipelines and related facilities. Identifying potential issues early avoids more costly fixes later.

For more information about pipeline management, go to: www.sdcwa.org/projects-programs/programs/asset-management/.

(Editor’s Note: The Fallbrook Public Utility District, Rainbow Municipal Water District, Rincon del Diablo Municipal Water District, Vallecitos Water District, Valley Center Municipal Water District, Vista Irrigation District, Yuima Municipal Water District, Helix Water District and the cities of San Diego, Poway and Ramona are 11 of the San Diego County Water Authority’s 24 member agencies that deliver water across the metropolitan San Diego region.)

San Diego County Water Authority And its 24 Member Agencies

First Aqueduct Maintenance Shutdown Runs Jan. 23-Feb. 1

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The San Diego County Water Authority’s First Aqueduct will be shut down periodically over the next three months for maintenance projects to ensure a safe and reliable water supply for the region. Two shutdowns on the First Aqueduct are scheduled from January through March, when portions of the aqueduct will be relined, along with other maintenance.

The Water Authority and its member agencies are coordinating to minimize impacts to residents and businesses, while servicing pipelines that are more than 65 years old.

Customers of these affected retail agencies during the Jan. 23-Feb. 1 shutdown should check with their local water utility if they have questions about localized impacts: Fallbrook Public Utility District, Rainbow Municipal Water District, Rincon del Diablo Municipal Water District, Vallecitos Water District, Valley Center Municipal Water District, Vista Irrigation District, and the Yuima Municipal Water District.

“Work to proactively upgrade and maintain our water delivery system in coordination with our member agencies ensures the continued safe and reliable supply that serves the region’s 3.3 million residents and our $268 billion economy,” said Eva Plajzer, the Water Authority’s director of operations and maintenance. “Taking care of this critical infrastructure during the shutdown season extends the life of the aqueduct and reduces the cost of replacement.”

Maintenance work on pipelines is scheduled during low-demand periods to minimize impacts on water service.

The other scheduled shutdown on the First Aqueduct is February 27 to March 8, which will also impact the Helix Water District and the cities of San Diego, Poway and Ramona.

The historic First Aqueduct was constructed in the 1940s with Pipeline 1 and in the 1950s with Pipeline 2. On November 28, 1947, the first Colorado River water flowed south from Riverside County for 71 miles into the City of San Diego’s San Vicente Reservoir via the First Aqueduct.

The Water Authority’s Asset Management Program is a key element of providing safe and reliable water supplies to the region. The agency continually assesses and inspects its 310 miles of large-diameter pipelines, which provide treated and untreated water to 24 member agencies in San Diego County. The program is widely recognized for pioneering work – including a patented inspection device – that promotes water affordability by avoiding costly unplanned disruptions in service.

As assets age, the Water Authority proactively replaces and repairs them to minimize impacts to member agencies and the public. Investments in the latest inspection technologies, including electromagnetic scanning, robotic inspections and 3D tunnel inspections help the Water Authority’s asset management team detect defects in pipelines and related facilities. Identifying potential issues early avoids more costly fixes later.

For more information about pipeline management, go to: www.sdcwa.org/projects-programs/programs/asset-management/.

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Emergency Water Delivery-Tijuana-San Diego County Water Authority

Water Authority Delivers Emergency Water Supply to Tijuana

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Fast action by the San Diego County Water Authority and its partners is helping maintain water service in Tijuana after problems with the city’s aqueduct emerged in December.

Emergency water deliveries started last week after a coordinated effort between the Water Authority, Otay Water District, and Metropolitan Water District of Southern California (MWD). The typical multi-month approval process was compressed into a few days to avoid additional water supply shortages in Tijuana.

Agency accelerates emergency water delivery

“We’re extremely proud of how quickly the Water Authority staff worked to meet the emergency water needs of our neighbors to the south,” said Mel Katz, Water Authority Board Chair. “Coordinating with multiple agencies and getting the necessary approvals in just three days was a team effort and is a credit to the Water Resources and Operations & Maintenance departments.”

Cross-border emergency deliveries started more than 50 years ago and are governed by an agreement between the United States and Mexico to provide Tijuana with a portion of Mexico’s Colorado River supply. The Water Authority provides emergency water deliveries to Mexico through a cross-border connection in Otay Mesa. These deliveries use Water Authority, Otay Water District, and MWD facilities to transport the emergency supplies from the Colorado River to Mexico, which pays transportation costs on deliveries to Tijuana and provides funds for meter connection upkeep. Deliveries are typically planned months in advance due to the number of government agencies involved.

Coordination with multiple agencies

On January 2, the Water Authority received a request for emergency water delivery to Tijuana. Water Authority staff immediately expedited the complex approval process during this unplanned Tijuana aqueduct outage. Those steps included working with the U.S. International Boundary & Water Commission, Otay Water District, and MWD to confirm system capacity availability and establish costs associated with the additional emergency deliveries.

The current water deliveries are scheduled to continue until the end of February. Consistent with the previously approved schedule, planned water deliveries will restart in April and continue through September 2023.

(Editor’s note: The Otay Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across San Diego County.)

San Diego County Water Authority And its 24 Member Agencies

Water Authority Delivers Emergency Water Supply to Tijuana

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Fast action by the San Diego County Water Authority and its partners is helping maintain water service in Tijuana after problems with the city’s aqueduct emerged in December.

Emergency water deliveries started last week after a coordinated effort between the Water Authority, Otay Water District, and Metropolitan Water District of Southern California (MWD). The typical multi-month approval process was compressed into a few days to avoid additional water supply shortages in Tijuana.

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Jim Madaffer-Vice Chair-Colorado River Board-Colorado River Board of California

Director Jim Madaffer Elected Vice Chair of the Colorado River Board of California

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San Diego County Water Authority Board Member Jim Madaffer has been elected vice chair of the Colorado River Board of California. The CRB represents California in river management discussions with other Basin states, federal agencies, tribes, and Mexico.

Madaffer, the Water Authority’s CRB representative since 2019, will serve a four-year term as vice chair following his election on January 11 during the CRB meeting in Ontario, Calif. He will serve alongside Imperial Irrigation District Board Vice President JB Hamby, who was elected chair.

Jim Madaffer: “It is essential that California agencies unite to uphold the Law of the River”

“I look forward to working with Chair Hamby and the rest of the Colorado River Board to both protect California’s water supplies during these challenging times and to work collaboratively to keep the river flowing for all users,” said Madaffer, a former chair of the Water Authority Board. “It is essential that California agencies unite to uphold the Law of the River as we seek solutions with the widest possible benefits.”

Established in 1937, CRB consists of agency representatives from the Water Authority, IID, Metropolitan Water District of Southern California, Coachella Valley Water District, Palo Verde Irrigation District, and the Los Angeles Department of Water and Power. Additional representatives include the directors of the California Department of Water Resources and Department of Fish and Wildlife, along with two public representatives.

Madaffer-Colorado River Board-JB Hamby-CRB

Jim Madaffer (L) the Water Authority’s CRB representative since 2019, will serve a four-year term as vice chair and will serve alongside Imperial Irrigation District Board Vice President JB Hamby, who was elected chair. Photo: San Diego County Water Authority

Collaboration to conserve

CRB’s role has been pivotal in protecting the state’s share of the river during this period when two decades of drought have caused a sharp supply/demand imbalance, leading to a severe decline in water levels in the river’s two main reservoirs, Lake Mead and Lake Powell.

Led by CRB, California has proposed conserving up to 400,000 acre-feet annually through 2026 to support the river. Though that conservation will not affect the San Diego region’s high-priority Quantification Settlement Agreement supplies, the region is continuing to take active steps to conserve as it has over the past three decades.

“The San Diego region is committed to doing our part to be good stewards of our water supplies,” said Water Authority Board Chair Mel Katz. “We also believe in working collaboratively with all stakeholders on the river, and Jim’s leadership on the Colorado River Board in his new role as vice chair will only advance those efforts.”

San Diego County Water Authority And its 24 Member Agencies

Director Jim Madaffer Elected Vice Chair of the Colorado River Board of California

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San Diego County Water Authority Board Member Jim Madaffer has been elected vice chair of the Colorado River Board of California (CRB), which represents California in river management discussions with other Basin states, federal agencies, tribes, and Mexico.

Madaffer, the Water Authority’s CRB representative since 2019, will serve a four-year term as vice chair following his election on January 11 during the CRB meeting in Ontario. He will serve alongside Imperial Irrigation District Board Vice President JB Hamby, who was elected chair.

“I look forward to working with Chair Hamby and the rest of the Colorado River Board to both protect California’s water supplies during these challenging times and to work collaboratively to keep the river flowing for all users,” said Madaffer, a former chair of the Water Authority Board. “It is essential that California agencies unite to uphold the Law of the River as we seek solutions with the widest possible benefits.”

Established in 1937, CRB consists of agency representatives from the Water Authority, IID, Metropolitan Water District of Southern California, Coachella Valley Water District, Palo Verde Irrigation District, and the Los Angeles Department of Water and Power. Additional representatives include the directors of the California Department of Water Resources and Department of Fish and Wildlife, along with two public representatives.

CRB’s role has been pivotal in protecting the state’s share of the river during this period when two decades of drought have caused a sharp supply/demand imbalance, leading to a severe decline in water levels in the river’s two main reservoirs, Lake Mead and Lake Powell.

Led by CRB, California has proposed conserving up to 400,000 acre-feet annually through 2026 to support the river. Though that conservation will not affect the San Diego region’s high-priority Quantification Settlement Agreement supplies, the region is continuing to take active steps to conserve as it has over the past three decades.

“The San Diego region is committed to doing our part to be good stewards of our water supplies,” said Water Authority Board Chair Mel Katz. “We also believe in working collaboratively with all stakeholders on the river, and Jim’s leadership on the Colorado River Board in his new role as vice chair will only advance those efforts.”

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FRS II- Mission Trails- Flow Control Facility

Mission Trails Water Project Completed; Park Trails Reopened

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One of the San Diego County Water Authority’s large-scale capital improvement projects – the Mission Trails Flow Regulatory Structure II and Flow Control Facility (FRS II) – is now completed. The project upgraded the Water Authority’s untreated water supply system by improving the delivery of water to treatment plants serving the central and southern areas of San Diego County.

The FRS II project, which began construction in spring 2020, includes a new 5-million-gallon underground covered reservoir, a flow control facility and pipeline interconnections. The reservoir is covered with soil and vegetation, except for several access hatches and vents that allow for air movement inside the reservoir. FRS II is the Water Authority’s second underground water tank located in Mission Trails Regional Park – the other one, located just west of the new one, is a treated water tank. The two tanks work to efficiently move water through the region, ultimately to customer’s homes and businesses.

“The Water Authority thanks the community for their patience while crews work to successfully build this important water delivery project,” said Michael Heu, the Water Authority’s construction manager for the project. “With the project completed, we are pleased to reopen the park trails which were previously impacted due to construction activity. The public’s safety was a top priority during this work.”

During construction, the Water Authority worked in partnership with key stakeholders, community partners, and the public to keep them well-informed about project status and park trail closures. Key construction highlights include:

  • Approximately 150,000 cubic yards of dirt excavated, with only 20,000 cubic yards exported
  • More than 100 concrete pours deposited 6,000 cubic yards of reinforced concrete
  • 100 columns inside the FRS II support the roof

The FRS II further enhances the Water Authority’s regional water delivery system – a system capable of delivering 900 million gallons of water each day to its 24 member agencies. The new Flow Control Facility delivers from 1 to 140 cubic feet per second of water to member agencies downstream of Mission Trails Regional Park.

Commitment to the Environment

While the Mission Trails Regional Park is known for its 8,000 acres of open space that draw hikers and outdoor enthusiasts, major sections of the Water Authority’s regional water delivery system run underground in the western portion of the park. When construction is required for pipeline maintenance or upgrading water facilities, the Water Authority makes minimizing the impact on the environment a top priority and the construction of the FRS II was no different.

Under the 2006 Good Neighbor agreement with the Mission Trails Regional Park Citizen’s Advisory Committee, the Water Authority is committed to rehabilitating any native habitats and open spaces in the park that are disturbed during construction to their natural state.

Since construction of the FRS II required some removal of native plants, the Water Authority pledged to plant and restore native vegetation of about 17 acres in the park.

Efforts for Revegetation and Hydroseeding

A critical part of successfully restoring the plant life began with mapping the plant habitats and soil types in the construction areas, then harvesting seeds from the native plants.

Before construction began in 2020, approximately 225 pounds of live seed were gathered from within the park and taken to a dedicated nursery. From these seeds, more than 22,000 native plants were grown and are currently being planted over a 17-acre area.

“The seeds harvested from the park prior to construction were twice as fertile than expected, which led to great success in growth,” said Summer Adelberg, Water Authority Principal Water Resource Specialist, who leads the revegetation efforts for the project. “We are pleased with the large number of plants already established throughout the project.”

Monitoring and Maintenance of Restored Areas

While water has already begun flowing through the underground storage tank structure, the restoration work and regrowth in the construction areas is far from over.

Once the planting is complete, each restored site will undergo a 120-day plant establishment period where the areas will be watered, weeded and maintained. That will be followed by a five-year maintenance and monitoring period to ensure the successful growth of the new plants.

In a few years, when revegetation has succeeded, you could be standing on top of nearly five million gallons of water and the only evidence of the massive underground tank will be small service hatches surrounded by native plants.

snow survey-Sierra Nevada snowpack-drought-Phillips Station

Snow Survey: Good Start but Drought Relief Depends on Coming Months

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The California Department of Water Resources first manual snow survey of the season Tuesday at Phillips Station recorded 55.5 inches of snow depth and a snow water equivalent of 17.5 inches, which is 177% of average for the location. The snow water equivalent measures the amount of water contained in the snowpack and is a key component of DWR’s water supply forecast. Statewide the snowpack is 174% of average for this date.

Survey: December storms delivered big snow totals

California is expected to see continued rain and snow over the next seven days, with the threat of flooding in parts of California. Conditions so far this season have proven to be strikingly similar to last year when California saw some early rainstorms and strong December snow totals only to have the driest January through March on record.

“The significant Sierra snowpack is good news but unfortunately these same storms are bringing flooding to parts of California,” said DWR Director Karla Nemeth. “This is a prime example of the threat of extreme flooding during a prolonged drought as California experiences more swings between wet and dry periods brought on by our changing climate.”

One year ago, the Phillips survey showed the seventh highest January measurements on record for that location. However, those results were followed by three months of extremely dry conditions and by April 1 of last year, the Phillips survey measurements were the third lowest on record.

More telling than a survey at a single location are DWR’s electronic readings from 130 stations placed throughout the state. Measurements indicate that statewide, the snowpack’s snow water equivalent is 17.1 inches, or 174%  of average for January 3.

Opportunities to save more water

“After three consecutive years of drought, the recent series of storms is a good start to the season,” said Jeff Stephenson, water resources manager with the San Diego County Water Authority. “However, we had a similarly strong early winter last year, which did not continue. While the Water Authority and its 24 member agencies have worked and continue to develop diverse water supply sources, there are still opportunities, including rebates, to save more water.”

In San Diego County, watersmartsd.org, provides sources of residential and business rebates, including indoor and outdoor incentives, and free landscape makeover classes. 

Stephenson added that the region has reduced its reliance on imported water supplies, including from the Sacramento-San Joaquin Bay Delta, which means more of that source is available for other parts of California.

Strong start but “a long way to go”

The January 2023 manual snow survey results are similar to results in 2013 and 2022 when the January 1 snowpack was at or above average conditions, only for dry weather to set in and lead to drought conditions by the end of the water year (September 30).

In 2013, the first snow survey of the season also provided promising results after a wet December similar to today’s results. However, the following January and February were exceptionally dry, and the water year ended as the driest on record, contributing to a record-breaking drought. In 2022, record-breaking December snowfall was again followed by the driest January through March period on record.

“Big snow totals are always welcome, but we still have a long way to go before the critical April 1 total,” said DWR’s Snow Surveys and Water Supply Forecasting Unit Manager Sean de Guzman. “It’s always great to be above average this early in the season, but we must be resilient and remember what happened last year. If January through March of 2023 turn out to be similar to last year, we would still end the water year in severe drought with only half of an average year’s snowpack.”

Sierra snowpack supplies 30% of California’s water

On average, the Sierra snowpack supplies about 30% of California’s water needs and is an important factor in determining how DWR manages the state’s water resources. Its natural ability to store water is why the Sierra snowpack is often referred to as California’s “frozen reservoir.” A below-average snowpack impacts water users across the state, putting further stress on the environment and critical groundwater supplies.

Due to these increasing swings from dramatically wet to dry conditions, Governor Newsom’s recently released “California’s Water Supply Strategy, Adapting to a Hotter, Drier Future” calls for investing in new projects and technologies that will modernize how the state manages water.

Current climate research indicates the state will see bigger swings from extreme heat and dry conditions to larger and more powerful storms that deliver temporary large boosts to the state snowpack as well as flood risk.

DWR encourages Californians to visit SaveOurWater.com for water saving tips and information, and to continue to conserve California’s most precious resource, rain or shine. DWR conducts five snow surveys at Phillips Station each winter near the first of each month, January through April and, if necessary, May. The next survey is tentatively scheduled for February 1.

San Diego County Water Authority And its 24 Member Agencies

Turn Off Irrigation During and After Rainstorms

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A series of storms bringing much needed rain to the San Diego region is also a reminder for residents and businesses to turn off irrigation systems when wet weather is predicted and for at least a week after significant rainfall.

While a series of atmospheric rivers is boosting Sierra snowpack and easing dry conditions statewide, there is still a long way to go to overcome three extremely dry years. Water-saving actions today can help conserve more of our most precious natural resource for when it’s needed most.

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WNN Top Stories of 2022-WNN-Water News Network-Top Stories

Water News Network Top Stories of 2022

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The Water News Network top stories of 2022 were drought-related and features about technology and college scholarships also engaged readers.

Water News Network Top Stories of 2022

The #1 Water News Network Top Story of 2022 focused on scholarship opportunities for water industry education and the growing need for water and wastewater industry workers:

Multiple California water associations and water agencies in San Diego County are offering college scholarships to help candidates achieve their goals.

A large number of recent retirements combined with the need for a skilled workforce up to date on new technologies have resulted in a critical need to increase the talent pool of skilled individuals in the water and wastewater industry, including in San Diego County.

Funding water industry education and training

Otay Water District officials presents the first donation for a scholarship fund to Cuyamaca College President Dr. Julianna Barnes named after Otay General Manager Mark Watton. Photo: Otay Water District

Among the highlights in the January 20 story, was news about the Mark Watton Scholarship Fund, established by the Otay Water District at the Foundation for Grossmont and Cuyamaca Colleges. The fund supports students attending the Center for Water Studies at Cuyamaca College. It honors Otay Water District General Manager Mark Watton’s four decades of service to the district.

Patent for pipeline inspection system

The #2 most viewed story on the Water News Network in 2022 highlighted an innovative tool to inspect pipelines developed by the San Diego County Water Authority:

The Water Authority has been granted its first ever utility patent for a device that inspects interior sections of water pipelines that are inaccessible or not safe to inspect without expensive specialized gear and training.

Industry-leading asset management program

Water Authority Operations and Maintenance Manager Martin Coghill invented the tool to save time, reduce costs and improve safety during ongoing aqueduct inspections. The Water Authority’s industry-leading Asset Management Program includes a proactive search for pipeline weaknesses that can be addressed before they become large and costly problems.

The U.S. Patent and Trademark Office awarded Patent #US011,293,581 on April 5, 2022, for the Water Authority’s pipeline inspection system, which comprises a body, cameras, support members and light sources to capture high-resolution images of pipeline walls.

Utility Patent-Pipeline Inspection Tool-

The San Diego County Water Authority has been granted its first ever utility patent for a device that inspects interior sections of water pipelines that are inaccessible or not safe to inspect without expensive specialized gear and training. Inventor Martin Coghill calls the tool “Scanny.” Photo: San Diego County Water Authority

Commitment to innovation

“This new pipeline inspection tool is a prime example of the Water Authority’s commitment to innovation that benefits ratepayers by saving money and enhancing reliability,” said Water Authority General Manager Sandra L. Kerl. “We have a long history of advancing industry-leading solutions, from state legislation to adopt low-flow toilets in the early 1990s to the nation’s largest water conservation-and-transfer program a decade later to the largest seawater desalination plant on the continent.”

Rebates and water conservation

The third most-viewed story detailed the California state tax breaks available and rebates to remove grass and save money, as California edged into the fourth consecutive year of drought:

A newly signed state law exempts local rebates for grass replacement from state income tax, ensuring more dollars can be spent creating beautiful and functional WaterSmart yards.

“Drought conditions make it imperative to boost water conservation in San Diego County and across the state,” said Sandra L. Kerl, general manager of the San Diego County Water Authority. “Using California tax incentives and regional rebates to install WaterSmart landscapes is a clear winner for stretching water supplies both today and for generations to come.”

The WNN feature story alerted homeowners and businesses in San Diego County that they are eligible to receive between $2 and $4 per square foot for removing grass and replacing it with low water-use plants that are better suited to withstand the hot and dry conditions that continue to hammer the West. All customers are eligible for the base rebate of $2 per square foot, but other agencies offer additional funding, including the City of San Diego and the County of San Diego.

Check latest rebates here: your-water/conservation/residential-rebates-programs

Claude “Bud” Lewis Carlsbad Desalination Plant

100 billion gallons-reverse osmosis-seawater desalination

Reverse osmosis is the heart of the Carlsbad Desalination Plant. During this process, dissolved salt and other minerals are separated from the water, making it fit for consumption. This reverse osmosis building contains more than 2,000 pressure vessels housing more than 16,000 reverse osmosis membranes. Photo: San Diego County Water Authority

Drought-proof supply

Coming in as the 4th most popular story on the WNN in 2022 was the benefit of seawater desalination providing a drought-proof supply for San Diego County:

As the worst drought in 1,200 years grips the West, the Claude “Bud” Lewis Carlsbad Desalination Plant is protecting the San Diego region with 50 million gallons a day of drought-proof water.

Completed in 2015, the plant was built before the period of increasing inflation that’s driving up prices for water infrastructure projects that are just starting. That means the desal plant is safeguarding the region’s economy and quality of life today at a lower cost than it would be to build now.

Carlsbad Desalination Plant-Water Supply Portfolio-desalination

The Carlsbad Desalination Plant uses reverse osmosis to produce approximately 10% of the region’s water supply; it is a core supply regardless of weather conditions, and it is blended with water from other sources for regional distribution. Photo: San Diego County Water Authority

100 billion gallons

“Desalination remains a valuable tool for our community when it comes to ensuring safe and reliable water supplies no matter the weather,” said Jeremy Crutchfield, water resources manager for the Water Authority.  “It has shown its value by generating nearly 90 billion gallons over the past six years, and I’m confident it will continue to do so in the years ahead.”

In late-October 2022, the Carlsbad Desalination Plant passed a milestone, having served more than 100 billion gallons of high-quality, locally controlled water over the past seven years – as California entered a fourth consecutive year of severe drought.

(Editor’s Note: Click on the years to see the most viewed stories from 2019, 2020, and 2021. The Otay Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across San Diego County.)