BILATERAL POWER GRID TELEMETRY · 2000-2025
Pennsylvania vs. Illinois Electricity Generation & Nuclear Share
Head-to-head comparison of Pennsylvania (248.2 TWh, led by Natural Gas at 57.9%) and Illinois (195.7 TWh, led by Nuclear at 49.9%).
Pennsylvania Generation 248.2 TWh #1: Natural Gas (58%)
Illinois Generation 195.7 TWh #1: Nuclear (50%)
Low-Carbon Share 34% vs 67% Pennsylvania vs Illinois
Grid CO2 Intensity 353 vs 222 gCO2/kWh (Pennsylvania vs Illinois)
Pennsylvania Fuel Mix (100% = 248.2 TWh) 34.3% Low-Carbon
Illinois Fuel Mix (100% = 195.7 TWh) 67.3% Low-Carbon
Pennsylvania (Cyan) vs. Illinois (Orange) - Total Electricity Generation (TWh)
Unit: Terawatt-hours (TWh) · Source: Ember Yearly Electricity Data & U.S. EIA
Annual Generation, Clean Share & Carbon Intensity Comparison
| Year | Pennsylvania (TWh) | Illinois (TWh) | Output Ratio (A / B) | Pennsylvania Clean % | Illinois Clean % |
|---|---|---|---|---|---|
| 2025 | 248.2 | 195.7 | 1.27x | 34.3% | 67.3% |
| 2024 | 242.5 | 186.8 | 1.30x | 34.6% | 69.2% |
| 2023 | 237 | 179.3 | 1.32x | 35.2% | 68.7% |
| 2022 | 240.1 | 186.5 | 1.29x | 35.1% | 67.3% |
| 2021 | 242 | 182.6 | 1.33x | 34.9% | 64.7% |
| 2020 | 230.8 | 173.8 | 1.33x | 36.8% | 67.6% |
| 2019 | 229.5 | 184.7 | 1.24x | 40.1% | 61.7% |
| 2018 | 215.8 | 188.1 | 1.15x | 43.3% | 58.9% |
| 2017 | 213.9 | 183.7 | 1.16x | 43.1% | 60.0% |
| 2016 | 215.3 | 187.3 | 1.15x | 42.3% | 58.7% |
| 2015 | 214.7 | 194 | 1.11x | 41.3% | 56.1% |
| 2014 | 221.2 | 202.2 | 1.09x | 39.4% | 53.8% |
| 2013 | 226.6 | 203 | 1.12x | 38.1% | 53.0% |
| 2012 | 223.4 | 197.6 | 1.13x | 36.5% | 53.1% |
| 2011 | 227.3 | 199.5 | 1.14x | 36.5% | 51.5% |
| 2010 | 229.8 | 201.4 | 1.14x | 36.4% | 50.4% |
| 2009 | 219.3 | 193.9 | 1.13x | 37.7% | 51.1% |
| 2008 | 222.2 | 199.5 | 1.11x | 37.7% | 49.3% |
| 2007 | 225.9 | 200.3 | 1.13x | 36.1% | 48.5% |
| 2006 | 218.6 | 192.4 | 1.14x | 36.6% | 49.5% |
| 2005 | 217.7 | 194.1 | 1.12x | 36.8% | 48.5% |
| 2004 | 214.1 | 192 | 1.12x | 38.4% | 48.5% |
| 2003 | 205.8 | 189.2 | 1.09x | 38.4% | 50.6% |
| 2002 | 203.9 | 188.2 | 1.08x | 39.1% | 48.8% |
| 2001 | 196.4 | 179.3 | 1.10x | 39.0% | 52.0% |