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.
Dry conditions in the Southwest, largely associated with La Niña, have intensified what the National Oceanic and Atmospheric Administration is calling the most significant U.S. spring drought since 2013, affecting an estimated 74 million people.
As the rain season comes to a close across Northern California, water districts are keeping a close eye on rain totals that are below average, and water managers are explaining what another “dry water year” means for our region. According to California’s Department of Water Resources, or DWR, the state is well into its second consecutive dry year. That causes concern among water managers. However, it comes as no surprise.
The 2021 drought is quickly becoming an emergency. Kern County’s supply from the State Water Project has been reduced to just 5 percent of a full allocation. Rainfall is about half of average. And with each passing dry day, the drought gets worse.
The Mendocino City Community Services District board declared a Stage 3 drought at its latest meeting, March 29. The district has recorded approximately 20.5 inches of rain for the year to date; this is the second-lowest recorded total in the past 100 years.
A Stage 3 drought includes the following mandates:
The Fort Yuma-Quechan Indian Tribe is situated at a nexus in the Colorado River Basin. That’s true in a geographic sense. The tribe’s reservation overlays the Arizona-California border near Yuma, Arizona. The two states are heavily reliant on water from the Colorado River. The reservation also abuts the U.S.-Mexico border where the river flows into Mexico for use in cities and on farms. One of the river’s largest irrigation projects, the All-American Canal, was dug through the tribe’s land, and flows from the reservation’s northeastern boundary to its far southwestern corner, on its way to irrigate crops in California’s Imperial Valley.
America is one thirsty country. The U.S. consumes 322 billion gallons of water every single day, according to the U.S. Geological Survey. The most, 133 billion gallons, goes to thermoelectric power. Next is irrigation at 118 billion gallons a day. The last big category is the 39 billion gallons of water that go to personal consumption. That’s the stuff that cooks the pasta and wets the washcloths and cleans the car tires and pours down the drains of millions of showers, sinks and toilets every second of every day. And the following is just one little drop in that great, big bucket.
In the early 1990s, most bottled water came from small, regional companies. In the ensuing years, control of the market has become concentrated among just a few giant corporations. Today, No. 1 Aquafina and No. 2 Dasani each do more than $1 billion in sales.
The San Diego City Council Tuesday appointed Val Macedo Jr. to the San Diego County Water Authority, giving the business representative for the local chapter of LIUNA a leadership role on the regional water board.
That appointment comes just over two years after his father, Valentine Macedo, who we quoted above, had a dispute with other construction union officials over San Diego’s Pure Water project, one of the largest infrastructure projects the city has pursued in its recent history, which is expected to eventually supply 53 million gallons of drinking water to city residents a day.
In late 2018, when the City Council was wrapping up a construction contract on the project, Macedo wrote to the Council taking issue with a provision he opposed, and that other major construction unions support.
“This requirement gets the City Council involved in an ongoing conflict between certain trades,” Macedo wrote.
Kelvin Barrios, then a Council staffer and now a Laborers employee, passed the letter to his boss, and other union leaders. Barrios went on to run for City Council against now-Councilman Sean Elo-Rivera, before dropping out of the race amid a handful of ethical violations, including failing to disclose that he was paid by the Laborers while still working for the city.
Probably unrelated: Elo-Rivera was the only Council member who did not support Macedo Jr.’s appointment this week.
Of note: Officials at the Water Authority nearly didn’t consider the massive Pure Water project in its accounting of the region’s long-term water needs earlier this year.
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.”
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
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.
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.
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.
