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A surcharge assessed to recover costs associated with energy efficiency programs that have been approved by the Public Utility Commission of Texas (PUCT). This amount is charged in addition to the standard TDU fee, but it may be bundled into a single line with all other Transmission and Distribution Utility (TDU) charges on the bill. If itemized separately, this surcharge may show up as "EEC," "Energy Efficiency," or even combined with the Advanced Metering System (AMS) charge.
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