About the data
EIA’s Hourly Electric Grid Monitor: demand, day-ahead demand forecast, net generation, interchange and generation by fuel for every balancing authority, using EIA’s adjusted values.
Hourly CO₂ intensity is computed from the fuel mix with EIA’s 2023 US average emission rates for coal, gas and oil.
- Served
- July 2015 to the latest hour; fuel mix from July 2018; subregion demand from July 2018
- Grain
- Hourly, by balancing authority
- Updates
- Every hour. Demand is about an hour behind and the fuel mix 9 to 14 hours behind
- Licence
- U.S. government data, public domain
Coverage by market
First year served: July 2015 in every market.
The newest day in each market, checked every hour, is on Coverage.
Access
Free for everyone, with no account.
Where it appears: Generation dashboard, agent, MCP.
MCP tools that return it: get_grid_hourly. The MCP server is part of Pro; setup is on MCP server.
Sources
- Hourly Electric Grid Monitor (EIA-930)(opens in a new tab), U.S. Energy Information Administration
Periods and update notes for each source are on Data sources.
Known gaps
- A balancing authority is not the same footprint as its ISO market.
- Hourly CO₂ intensity is an average rate of generation inside the region, not consumption-based and not marginal.
- The fuel mix starts in July 2018 and runs 9 to 14 hours behind demand.
Missing values stay missing: a null means the source has no usable record, never zero. Zero and negative values are shown as reported.
How InfraMap uses it
How InfraMap joins, groups and calculates with this dataset is on Methodology.
Questions it answers
- How did PJM hourly demand compare with EIA’s day-ahead demand forecast over the last 30 days?
- What share of ERCOT generation came from wind and solar in each month of summer 2025?
- What was the hourly carbon intensity of MISO generation yesterday?