Last reviewed on 10-02-2020

Documentation of California's Greenhouse Gas Inventory (13th Edition - Last updated on 10-15-2020)

♦ Category: Energy

IPCC: 1B3 - Fugitive Emissions from Fuels - Geothermal Energy Production
Sector: Electricity Generation (In State) : Merchant Owned

♦ Activity: Geothermal power - Geothermal

♦ Greenhouse gas: Carbon dioxide ( CO2 )

► Year 2001 —

● Greenhouse gas emission estimate —

Amount: 1,039,283 tonnes of CO2 Emitted (1,039,283 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Geothermal power] * [Geothermal CO2 emission]
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from geothermal power available at:

● Activity level used in calculations —

Activity: Geothermal power = 256,020,352,000,000 btu of Geothermal
Basis: Data
Reference: EIA (2013). Energy Information Administration. Form EIA-906/920/923: Monthly Utility Power Plant Database. Accessed online at:

● Parameters and Constants used in calculations —

Parameter: Geothermal CO2 emission = 4.059E-03 g / btu
Reference: Average of geothermal emission factors from CARB's 2009-2010 Mandatory Reporting Program. Reported emissions are available at: #

● Greenhouse gas emitted per unit activity (derived from values listed above) —

Amount: 4.059E-03 g of CO2 per btu of Geothermal