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In July 2019, the Water Authority activated a call center, issued approximately 293,000 postcard notices in English and Spanish, and updated a dedicated water quality webpage following a malfunction at the Twin Oaks Water Treatment Plan that resulted in a citation from the state Division of Drinking Water. Due to additional treatment processes in place, water in regional pipelines remained safe for all uses, and corrective actions were taken immediately following the April 2019 incident. In coordination with state regulators, the Water Authority and impacted member agencies identified and notified all customers who may have received water from the Twin Oaks plant during the malfunction. The public notification process required staff from across the agency to quickly come together to set up the call center and train staff to address questions.