Department regulations also establish limits for contaminants in bottled water that provide the same protection for public health. The public is welcome to attend these meetings. Lake Bard Water Filtration Plant - Water systems that use an approved surface water source must meet state and federal requirements for filtration, coagulation, flocculation, and disinfection of that water. Water from Calleguas surface water source is treated at the Lake Bard Water Filtration Plant. Watershed Protection - The treatment of a surface water source actually begins with the protection of the Lake Bard watershed to markedly reduce the potential for microbial contamination.
Ozone is created onsite in two ozone generators using electricity and high-purity oxygen gas.
Any residual ozone is converted back to oxygen prior to being released to the atmosphere. After the water is oxidized, it enters a rapid mix unit where alum and polymer are dispersed into the water to condition small suspended solids for filtration. The chemicals promote the conglomeration of the microscopic particles to form larger, filterable particles known as floc. The friction energy created by water passing through the pipes causes small suspended particles to collide and form floc. Filtration - The water is then filtered through a bank of eight gravity filters that capture and remove the flocculated solids.