Full Description

The Baldy Mesa Water District serves water to approximately 15,000 people inCalifornia's High Desert near Victorville. The District currently relies on groundwaterpumped from nine wells. The measured arsenic concentrations in the wells have rangedfrom 5 to 20 parts per billion (ppb), and all of the wells have experienced Asconcentrations higher than the new MCL of 10 ppb. In addition to the water qualitychallenge, the groundwater basin is in a state of overdraft, and a court-approvedadjudication limits the allowable pumping of groundwater by users in the basin. Tofurther stress water supplies, residential development is occurring at an unprecedentedrate in the District's service area.The District embarked on a water supply plan to evaluate their options in the face of thesechallenges. The options included groundwater treatment, blending of treated and rawgroundwater, and the introduction of a new surface water supply from the State WaterProject. As the District continues to grow, a surface water supply will be more feasible toaugment, or even to replace the District's water supply, although this new water sourcebrings its own water quality challenges, including taste and odor and disinfection byproducts.For groundwater arsenic treatment, the District has evaluated various treatment options(including IX, GFH, and coagulation assisted filtration) and treatment facilityconfigurations, including separate well-head treatment, semi-centralized treatment, andcentralized treatment. The selection of SWP treatment process is hinged on Taste

Product Details

Edition: Vol. - No. Published: 11/01/2005 Number of Pages: 1File Size: 1 file , 43 KB