52 million gallons of recycled wastewater a day is helping keep California’s drought at bay

Primary treatment

Inland Empire Utilities Agency
To the right is where primary treatment takes place

This stage of the treatment process is covered and ammonia is removed from urine. The flow of the sewage is also slowed down so that additional heavy debris can settle at the bottom and be easily removed. (Gravity is the least expensive way to remove solids.)

A chemical called ferric chloride is added to the sewage, which allows the solids to bind together and settle to the bottom.

Secondary treatment>>>


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