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Published method

EPA eGRID State Grid Carbon Intensity

Ranks the exact 50-state-plus-DC cohort by EPA eGRID annual generation-based CO2e total output rate.

1.0.0

Version

Jul 27, 2026

Published

1

Board

epa-egrid-state-carbon-intensity

Method ID

How the order is produced

Direction

ascending

Tie Breakers
  • egrid-state-renewable-generation-share-percent
  • stateCode
Primary Metric

egrid-state-co2e-output-rate-lb-mwh

Transformation

none

Renewable Tie Breaker Direction

descending

When the method reruns

Each board shows the date of the snapshot it is built from.

Boards

Boards using this version

BoardPrimary measureRowsConfidenceSnapshotBoard versionRefreshBoard
State grid carbon intensityegrid-state-co2e-output-rate-lb-mwh51100%Dec 31, 20231.0.0Not statedOpen the board: State grid carbon intensity

Versioned contract

Complete measurement ledger

Ranking

Direction

ascending

Tie Breakers
  • egrid-state-renewable-generation-share-percent
  • stateCode
Primary Metric

egrid-state-co2e-output-rate-lb-mwh

Transformation

none

Renewable Tie Breaker Direction

descending

Release

eGRID2023 Revision 2

Data Year

2,023

Universe

50 U.S. states and the District of Columbia

Limitations

  • State output rates describe generation located in a state; they are not consumption-based electricity footprints.
  • The values are annual averages, not hourly or marginal emissions rates.
  • No facility load, utility tariff, power-purchase agreement, or data-center operating profile is joined.
  • Resource-mix shares can differ from electricity delivered to a particular customer because power crosses state borders.

Context Metrics

  • egrid-state-nameplate-capacity-mw
  • egrid-state-net-generation-mwh
  • egrid-state-coal-generation-share-percent
  • egrid-state-gas-generation-share-percent
  • egrid-state-nuclear-generation-share-percent
  • egrid-state-renewable-generation-share-percent

Interpretation

Generation Based

Yes

Consumption Based

No

Marginal Emissions

No

Not Data Center Specific

Yes

Geography Version

us-states-dc-2026-07-26

Resource Mix Normalization

Formula

source_fraction * 100

Source Unit

fraction

Published Unit

percent

Formula Version

1

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