A month of electricity generated inside New York State. Colors follow the same order around every square: nuclear, hydro, wind, solar and other renewables, dual fuel, natural gas, and oil and other fossil fuels.
Small sources may not earn a triangle, but they still count in the numbers. Blank squares are hours with incomplete readings.
The data
NYISO publishes the state's fuel mix about every five minutes. Readings are averaged into fifteen-minute intervals, then into hours. Imported power isn't included. Times are Eastern: the skipped spring-forward hour stays blank, and the repeated fall hour is combined.
"Oil and other fossil" is NYISO's Other Fossil Fuels category. Dual-fuel plants, which can burn gas or oil, are counted separately.
Source: NYISO Real-Time Fuel Mix
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Data: NYISO. Concept and design: Great Big Yarn. Built with Claude Code and Codex.
