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Meadowlark Water Reclamation Facility employee Ivan Murguia monitors water quality. Photo: Vallecitos Water District

Vallecitos Water District Recognized for Innovative Technology at Mahr Reservoir

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The Vallecitos Water District received two awards for its innovative use of technology to reduce algae blooms at the Stanley A. Mahr Reservoir in San Marcos.

The district received the “Excellence in Action” award from the national WateReuse Association, and the “Innovation and Resiliency” award from the California Association of Sanitation Agencies, or CASA.

The WateReuse Association is the nation’s only trade association solely dedicated to advancing laws, policy, funding, and public acceptance of recycled water. CASA provides leadership, advocacy, and information to its members, legislators, and the public. CASA also promotes partnerships on clean water and beneficial reuse issues that protect public health and the environment.

Known for its sustainable practices in water and wastewater treatment processes without compromising water quality, Vallecitos Water District employs a new ultrasound technology to improve water quality at the Mahr Reservoir and reduce the need for chemical treatment.

“These awards are proof of the Vallecitos Water District’s commitment to innovation,” said Vallecitos Board President Mike Sannella. “District staff are to be commended for their efforts to use innovative technology to improve and enhance our operations.”

See video recognizing contribution of Vallecitos employees to award-winning projects

Algal blooms treated with sonic technology

Originally called La Costa Storage No. 1 Dam and Reservoir when completed in 1981, Mahr Reservoir was renamed after original founder and 35-year board member Stanley A. Mahr. It stores up to 54-million gallons of reclaimed water for irrigation use. Vallecitos Water District has contracts with the City of Carlsbad and Olivenhain Municipal Water District to provide as much as five million gallons of recycled water daily as needed.

The Mahr Reservoir stores up to 54 million gallons of reclaimed water to be used later for irrigation. Photo: Vallecitos Water District Recognized for Innovative Technology

The Mahr Reservoir stores up to 54 million gallons of reclaimed water to be used later for irrigation. Photo: Vallecitos Water District

Because the reservoir’s location receives intense sunlight with little rain, algal blooms can occur in the nutrient-rich recycled water. Algal blooms are commonly treated with costly chemicals that are labor-intensive to apply. Vallecitos Water District uses technology developed by LG Sonic of the Netherlands. It provides a complete overview of reservoir water quality, allowing swift identification and treatment of algal blooms.

Every ten minutes, an MPC Buoy in the Mahr Reservoir measures and monitors green and blue-green algae population, pH, turbidity, dissolved oxygen, and water temperature. The data is collected in real time and uploaded online software, which uses the data to predict algal blooms three to ten days in advance.

Sound barrier limits algae

The LG Sonic buoy can create a sound barrier in the top water layer. It affects the algae buoyancy, preventing it from rising where it can absorb sunlight to grow. Starved of sunlight and nutrients, algae cells sink to deeper water where they degrade due to natural bacteria and do not release toxins into the water.

With overall algae levels reduced through sonic technology, the need for chemical treatment is also reduced. LG Sonic’s specific low-power ultrasonic transmitters emit signals which are not harmful to people, fish, plants, or other wildlife.

Olivenhain Municipal Water District Logo landscape design workshops

OMWD Awarded Federal Funding to Complete its Advanced Metering Infrastructure Project

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Encinitas, Calif. — Olivenhain Municipal Water District has been awarded $500,000 in grant funding from United States Bureau of Reclamation for OMWD’s Advanced Metering Infrastructure project. The award was made available through USBR’s Water and Energy Efficiency Research Program for Fiscal Year 2021.

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Santee Council Gets Update on Padre Dam’s Big Project

/in , , /by /East County Magazineby Mike Allen
Padre Dam Municipal Water District wants to keep everyone in the loop about its massive sewage reclamation project, especially the city where the project is located — Santee.

At its March 24 virtual meeting, the Santee City Council approved a legal agreement to work collaboratively with the joint powers authority that is overseeing the nearly $700 million program called Advanced Water Purification.

Unlike so many other actions taken by the Santee Council, this one (called a memorandum of understanding or MOU), wasn’t required by the state Legislature in Sacramento. Instead, the idea was for the new oversight agency called the East County Advanced Water Purification Joint Powers Authority to be proactive, providing the city with all the information about the project, and how it will unfold.
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Water Shortages and Fires Loom After a Dry Winter

/in , , /by /The New York Timesby Vindu Goel and Jill Cowan

Good morning.

The weather forecast today calls for sunshine across the state, with barely a cloud on the horizon for the next week or so.

Pour yourself a nice, cool glass of water — and then think about how you’re going to start conserving it.

The lack of rain and snow during what is usually California’s wet season has shrunk the state’s water supply. The Sierra Nevada snowpack, a crucial source of water as it melts over the spring and summer, is currently at 65 percent of normal. Major reservoirs are also low.

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Southwestern US Experiencing Warmest Weather in Months

/in , , /by /AccuWeatherby Jessica Storm

The warm air that moved into the Southwestern states over the weekend will stick around on Monday, with temperatures soaring to their highest levels since 2020.

Some cities are forecast to come as close as 5 degrees Fahrenheit from record high temperatures.

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Utah is a Leader in Cloud Seeding. Is it Working?

/in , , /by /The New York Timesby Zac Podmore

Utah’s winter sports industry may claim the greatest snow on Earth, but for skiers and water watchers alike, there is hardly ever enough powder.

For nearly 50 years, the second-driest state in the nation has been giving natural winter storms an engineered boost to help deepen its snowpack through a program largely funded by state taxpayers, local governments and water conservancy districts.

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Early Indicators of Drought Surface in Santa Cruz County

/in , , /by /The Santa Cruz Sentinelby Hannah Hagemann

As cherry blossoms and calla lilies spring to life, the sun shines and rain showers begin to seem like a distant memory. Spring is here, and with it Santa Cruz County has begun to show early indications of drought, with little reprieve in sight.

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Industry Eyeing EPA’s Hustle to Control ‘Forever Chemicals’

/in , , /by /Bloomberg Lawby Pat Rizzuto

Industry attorneys say they’re bracing for a wave of corporate liability and litigation as the Biden administration works swiftly to fulfill a campaign promise to control “forever chemicals.”

The Environmental Protection Agency this month announced it’s working on three water-related regulations for per- and polyfluoroalkyl substances, or PFAS. It sent a fourth chemical data-collection proposal to the Office of Management and Budget, or OMB, for approval.

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California’s Water Worries May Not Affect San Diego

/in , , /by /KPBS-FM/TVby Erik Anderson Quoted: San Diego County Water Authority

California could be facing a dry summer after two dry winters, but there shouldn’t be a huge impact on local supplies.

California water officials have already cut in half the amount of water they expect to deliver from the state water project.

That could be a major cut for central valley farmers and other water users that rely heavily on the Sacramento Delta for their water.

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Sweetwater Authority Reservoirs Provide Safe Public Recreation

/in , , /by /Water News Network

One year into the coronavirus pandemic, San Diego County’s reservoirs and lakes have provided welcome opportunities for safe, accessible outdoor family recreation.

After shutting down in March 2020, facilities began to slowly reopen through the summer months by carefully implementing safety guidelines, including increased sanitation, social distancing, and restricted attendance to allow San Diegans to resume their favorite hiking, fishing, horseback riding, and bird watching activities.

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