On July 1, 2020, California State Water Board’s November 2018 amendments to the Industrial General Permit Order took effect. The modifications implement Sufficiently Sensitive Analytical Test Methods, Total Maximum Daily Loads (TMDL), and Statewide Compliance Options incentivizing onsite or regional stormwater capture and use. Thirty-six TMDLs were adopted into the order and include water bodies in the San Francisco Bay, Los Angeles, Santa Ana, and San Diego Regional Water Board areas. Industrial stormwater operators who discharge specific pollutants related to these TMDLs can be subject to permit violations, corrective actions, and possibly mandatory minimum penalties.

“California’s Industrial General Permit was amended and has gone into effect as of July 1. BC can help our clients navigate the changes related to TMDLs and stormwater capture and water reuse incentive options.”

Laura Carpenter

About the experts

Laura Carpenter is Principal Hydrologist for Brown and Caldwell. She is based in San Diego, California, and has 14 years of experience in a variety of water resource projects from stormwater compliance to water supply management.

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