Orange County has two desalination plants, the Dana Point Desalination Plant and the Huntington Beach Desalination Plant. While these plants can provide a significant amount of drinking water, they do not currently have the capacity to supply the entire Orange County.
The Dana Point Desalination Plant has a production capacity of 5 million gallons per day (MGD), while the Huntington Beach Desalination Plant has a production capacity of 50 MGD. Together, these plants have a total production capacity of 55 MGD.
To put this into perspective, Orange County's total water demand is approximately 600 MGD, which includes residential, commercial, and industrial use. This means that the desalination plants currently provide less than 10% of Orange County's water supply.
However, it is worth noting that the desalination plants are an important part of Orange County's water supply portfolio, especially during times of drought or when imported water sources are limited. In addition, the Huntington Beach Desalination Plant is currently undergoing expansion to increase its production capacity to 100 MGD by 2023, which will help to further increase the county's water supply.
The water produced by the desalination plants in Orange County is safe and high quality to drink. Desalination is a process that removes salts and other contaminants from seawater, making it suitable for human consumption.
The desalination process typically involves several steps, including pretreatment, membrane filtration, and disinfection. Pretreatment involves removing large particles and debris from the seawater, while membrane filtration uses a semipermeable membrane to remove salts and other contaminants. Finally, disinfection is used to kill any remaining bacteria or viruses.
The water produced by the desalination plants is monitored and tested to ensure it meets or exceeds drinking water standards set by the Environmental Protection Agency (EPA) and the California State Water Resources Control Board. This includes testing for a wide range of contaminants, such as bacteria, viruses, minerals, and chemicals.
In fact, the Orange County Water District's Groundwater Replenishment System, which uses treated wastewater and desalinated seawater to recharge the county's groundwater basin, has won numerous awards for its water quality and safety. The system has been recognized by the Water Environment Federation and the American Society of Civil Engineers, among others.
It's important to note that desalination is an energy-intensive process and can be expensive compared to other water supply sources. Therefore, while desalination plants are an important part of Orange County's water supply, they are not the only solution to addressing the county's water needs. The county is also working to reduce water demand through conservation measures and implementing other water supply options, such as recycled water and groundwater management.