Generation
EIA-923 through Jul 2026The same NYISO plants made 1.6% more power than a year earlier. Gas added 2.3 TWh and nuclear fell 770 GWh. Clean power is 47% of its output, down 7 points since 2019.
How NYISO got here
Share of net generation each yearClean power 54% in 2019, 47% in 2025. Hover a year for its mix.
Fuel by fuel
Share is 2025; Jan–Jul compares the same plantsWho makes NYISO’s power
2025, 137 TWhEach block is a plant. Hover to see it, click to open its page.
Each block is one plant, sized by its 2025 output; the lighter block holds the smaller plants. Pumped storage, which nets negative, is left out.
This year against last
20262025Running total, same plants, each on its own scaleBiggest gains
Cricket Valley Energy+1.9 TWh2.0 TWh → 4.0Astoria Energy II+892 GWh1.4 TWh → 2.3Sithe Independence+502 GWh3.4 TWh → 3.9Ravenswood+289 GWh1.7 TWh → 2.0Biggest drops
Arthur Kill−613 GWh1.4 TWh → 809Nine Mile Point−405 GWh9.1 TWh → 8.7Bowline Point−334 GWh1.2 TWh → 857R E Ginna−326 GWh2.9 TWh → 2.6New this year
1 plant, 113 MW, made 50 GWh by July.
Battery discharge
GWh a month2026 months are provisional: monthly reporters only. Plants that report once a year appear when the 2026 file is final.
CO₂ intensity
lb per MWh529 lb/MWh in 2025, up 8% since 2020. The seven ISOs together: 767.
EIA-923: 2019–2025 final; Jan–Jul 2026 counts plants that report monthly (about 84% of NYISO’s output last year) and compares them with the same plants in 2025. CO₂ from 2020: EPA CAMPD, or EIA-923 fuel use × EPA emission factors where CAMPD misses a plant or covers it in part. Sources