Our team has been working on treatment solutions for over 20 years, making us the team with the experience and knowledge to help utilities that will need to install treatment to comply with the new MCL. As with all our other projects, Corona chooses treatment tailored to the client’s specific situation. Though all available treatment options will work for Cr(VI) removal, their cost and applicability will vary on a system-by-system basis. We want to make sure our clients are provided with technically and economically sound recommendations while maintaining the ability to produce high-quality and compliant drinking water that our own families would drink.

Corona assisted our clients in permitting “first-of-their-kind” solutions, including the first SBA regenerable system, the first non-regenerable SBA system, and the first modified RCF system that simultaneously removes iron and manganese. In each case, we optimized the parameters of these treatment approaches through pilot testing, which ultimately resulted in lower costs for our clients and their ratepayers. 

Additionally, Corona developed a “Suggested Framework for Economic Feasibility Analysis” in 2020 for the Southern California Water Coalition. This document was in response to the California State Water Resources Control Board’s white paper on “Economic Feasibility Analysis in Consideration of a Hexavalent Chromium MCL.” The report includes a screening-level assessment, benefit-cost analysis, affordability assessment, and considerations for small systems.