Environment Metrics

Section 1

Air Emissions Management

ᵃ Gross Basis
ᵇ Proposed changes to greenhouse gas warming factors by the EPA if finalized will increase the percent of emissions attributable to CH4 due to a calculation methodology change rather than performance.

ᵃ Tonnage by source is gross and does not include impact from offset retirement.
ᵇ Source categorization for tank flaring changed from process emissions to flaring for 2022 to align with peers.
ᶜ Percentages do not total 100% due to rounding.

ᵃ Greenhouse gas (GHG) carbon dioxide equivalent (CO₂e) emissions are based on carbon dioxide, methane and nitrous oxide from Marathon Oil-operated facilities only.
ᵇ U.K. assets divested in 2019.
ᶜ 2021 value is net GHG, incorporating 12,500 MT of retired REDD+ offsets for each asset and REC offset for Scope 2 emissions.

ᵃ U.K. assets divested in 2019.
ᵇ Increase in 2020 was due to a counting discrepancy discovered during in-housing of the GHG inventory, and production decline.
ᶜ When compared to historic performance, the profile of emissions sources shifted substantially due to focused efforts to reduce associated gas flaring in the Bakken. Increased percentages in other areas don’t reflect an increase in emissions from that source, rather a composition change over a smaller total emissions base.

Section 2

ᵃ Generally, water use and water withdrawal are the same except for small differences due to evaporation from company owned and operated ponds.

ᵃ According to Aqueduct, physical water stress measures the ratio of total annual water withdrawals to total available annual renewable supply, accounting for upstream consumption. Classifications are provided in the Aqueduct tool.

ᵃ Improved source water testing in the Permian as operations have matured post-acquisition has allowed for better classification of water quality.
ᵇ Reduction in water consumption in 2020 and 2021 is largely due to a lower level of completion activity due to the COVID-19 pandemic.
ᶜ Equatorial Guinea consumptive use is minimal.

ᵃ Reduction in water consumption in 2020 and 2021 is largely due to a lower level of completion activity due to the COVID-19 pandemic.

Section 3

ᵃ Data includes spills released off-site ≥ to 1 barrel. All spills to the environment are remediated per state requirements.
ᵇ ~47,500 barrels of 2019 total spill volume was produced water.

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