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State of the Art Water Treatment Protection Engineering, Inc. is a California corporation based in Richmond, CA. We have served as a water treatment consultant and chemical supplier to the greater Bay Area for over 40 years. Based on our chemical engineering expertise and numerous associates, we have solved problems, conserved water and energy, while providing products and consultation for corrosion and scale inhibition for boilers and cooling towers. We also specialize in wastewater treatment/recycle for industrial and municipal clients.