Properly calculated CO2e emission rates reflect NYISO Security Constrained Unit Commitment (“SCUC”) in the day-ahead market; and thus the generators responsible for most of New York City's emissions.

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The example at left illustrates the large difference between SCUC-based marginal emission rates and the "average" emission rates issued by the U.S. EPA and by NYC under LL97. (Click to download QCo's underlying analysis)

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Early in the week, NYC temperatures reached the mid-90’s, later in the week the mid-80’s.  Significant local emissions reduction was achievable by eliminating the local marginal baseload generator from operation -- by targeting the few peak days and hours that dominated SCUC.