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Environmental performance1
Supply chain 16,17
Global employee diversity 15
US Equal Employment Opportunity Commission statistics 15
Health and safety performance 18

  1. This section reflects 2018 data collected as of April 12, 2019. All data are reported on an operated basis unless otherwise noted.
  2. Chevron reports petroleum spills to land and water to conform to the 2015 IPIECA Reporting Guidance. Spills to land and water that are greater than or equal to one barrel are included. Spills to secondary containment and chemical spills are excluded.
  3. The six (6) spills of significance that Chevron experienced in 2018 ranged in size from 0.01 to 0.3 thousand barrels. Of the one (1) thousand barrels spilled in total, 0.6 were spilled to secondary containment.
  4. For purposes of conforming to the 2015 IPIECA Reporting Guidance, Chevron defines a spill of significance as a process safety Tier 1 loss-of-primary containment (LOPC) event (as defined by American National Standards Institute/American Petroleum Institute [ANSI/API] Recommended Practice [RP] 754) with a consequence of a release of material greater than the threshold quantities described in Table 1 of ANSI/API RP 754 in any one-hour period. Spills to secondary containment, regardless of actual environmental impact, are included, as are chemical spills. Releases to air are excluded.
  5. Fresh water withdrawn totals decreased in 2018 (relative to prior years) in part due to continued transition to the use of brackish water in lieu of fresh water at our operations in the Permian Basin and a refinement in water use estimates.
    Produced water is excluded from fresh water withdrawn, fresh water consumed and nonfresh water withdrawn.
    Fresh water withdrawn from the environment is defined per local legal definitions. If no local definition exists, fresh water is defined as water extracted, directly or indirectly, from surface water, groundwater or rainwater that has a total dissolved solids concentration of less than or equal to 2,000 mg/L. Fresh water withdrawn does not include effluent or recycled/reclaimed water from municipal or other industrial wastewater treatment systems, as this water is reported under nonfresh water withdrawn.
    Nonfresh water withdrawn could include: seawater; brackish groundwater or surface water; reclaimed wastewater from another municipal or industrial facility; desalinated water; or remediated groundwater used for industrial purposes.
  6. Oil concentration is determined by the sampling of effluent streams, using methods required or recommended by regulatory agencies or authorities, where applicable. Chevron reports the total cumulative amount of oil discharged to surface water excluding spills, which are reported separately.
  7. The World Resources Institute/World Business Council for Sustainable Development Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard defines three “scopes” that Chevron uses to report GHG emissions. Scope 1 includes direct emissions from sources within a facility. Scope 2 includes indirect emissions from electricity and steam that Chevron facilities import. Scope 3 includes all other indirect emissions. Chevron reports information related to Scope 3 emissions from third-party use of our products, which account for over 90% of our total Scope 3 emissions.
  8. Direct GHG emissions related to production of energy in the form of electricity or steam exported or sold to a third party have been included in the reported Scope 1 emissions to conform to the 2015 IPIECA Reporting Guidance.
  9. 2018 direct GHG emissions, on both an equity and operated basis, increased primarily due to increased production at our Wheatstone operations.
    Refinements were made in the data reporting for 2017 equity and operated GHG emissions.
    All six Kyoto GHGs — carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), sulfur hexafluoride, perfluorocarbons and hydrofluorocarbons—are included in Chevron’s Scope 1 emissions. CO2, CH4 and N2O are accounted for in Chevron’s Scope 2 emissions and in Chevron’s Scope 3 emissions related to the electricity and steam that Chevron exports to third parties.
    The following entities are not currently included in the 2018 Chevron corporate GHG inventory: Chevron Phillips Chemical Co., the Caspian Pipeline Consortium, and other nonoperated assets in which Chevron has an equity interest of 16 percent or less. Emissions from the Wheatstone asset have been included in the inventory where Chevron has operational control, as defined by Australia’s National Greenhouse and Energy Reporting Act 2007.
    Information regarding GHG emissions from Chevron Phillips Chemical Company LLC can be found at
    Additional GHG emissions data can be found at
  10. Chevron calculated emissions from third-party use of our products by multiplying total 2018 Upstream liquids and gas production by emissions factors from API’s Compendium of Greenhouse Gas Emissions Methodologies for the Oil and Natural Gas Industry (2004, 2009).
  11. The 2018 enterprisewide flare gas volume rate decreased due to improvements made in equipment reliability in our Australasia Business Unit.
    The 2017 average flare gas volume rate has been restated.
    In 2018, 17 percent of Chevron’s total direct (Scope 1), operated GHG emissions were from process emissions and vented sources, as defined by API’s Compendium of Greenhouse Gas Emissions Methodologies for the Oil and Natural Gas Industry (2004, 2009).
  12. Total energy consumption increased due to increased production in our Australasia and Midcontinent business units but were offset by the divestment of less efficient assets.
    The 2017 energy data have been restated to correct an error and account for additional information that was received after the publication of the 2017 Corporate Responsibility Report Highlights.
    Refining energy performance is measured by the Manufacturing Energy Index (MEI), which is calculated using the Solomon Energy Intensity Index methodology. MEI includes operated assets and nonoperated joint-venture refineries.
    Energy performance for Oronite, Lubricants, Americas Products and International Products is measured by the Non-Manufacturing Energy Index, which is the energy required to produce Chevron products compared to the energy that would have been required to produce the same products in 1992 (the index’s base year).
  13. VOC, SOx and NOx emissions decreased in 2018 due to reductions in venting and flaring, asset divestments, revision of in-scope sources and refinements made in data collection and calculations.
    Refinements were made in the data reporting for 2017 NOx, SOx and VOC emissions, including the exclusion of third-party time-chartered vessels.
    For compiling and reporting air emissions data, Chevron follows regulatory definitions of VOC. SOxemissions include SO2 and SO3, reported as SO2-equivalent. NOxemissions include NO and NO2 (reported as NO2-equivalent) and exclude N2O.
    Additional air emissions data can be found at
  14. To conform to the 2015 IPIECA Reporting Guidance, and where appropriate information and data exist, our hazardous waste numbers starting in 2015 exclude remediation waste generated, disposed of and recycled.
    Hazardous waste amounts are quantified using methods required or recommended by regulatory agencies or authorities, where applicable. In other instances, similar methods are used, including direct measurement onsite or at the point of shipping, engineering estimates, and process knowledge. Chevron follows the regulatory definitions of hazardous waste applicable to the jurisdictions in which we operate, including de minimis specifications (below which hazardous waste quantities do not need to be reported).
  15. Data are based on information that was received from the regulatory agency and recorded internally prior to the publication of this report.
  16. Global Employee diversity data and data from the U.S. Equal Employment Opportunity Commission have been rounded to the nearest integer for 2018 and previous years, and ethnicity/gender combined has been rounded to one decimal place.
    The Other category in the U.S. Equal Employment Opportunity Commission statistics includes Two or More Races, Native American, and Pacific Islander.
    U.S. Equal Employment Opportunity Commission statistics minority grouping includes ethnic diversity, both men and women.
  17. This section reflects data collected as of February 20, 2019.
  18. Data exclude spend that is ultimately shared with our partners.
  19. This section reflects Chevron data collected as of February 12, 2019.
  20. Health and safety performance rates include both injury- and illness-related incidents. API’s Benchmarking Survey of Occupational Injuries, Illnesses and Fatalities in the Petroleum Industry data are used as industry benchmarks.
  21. Data include catastrophic and major incidents only.
  22. Process safety Tier 1 (LOPC) events are unplanned or uncontrolled releases resulting in consequences equivalent to those specified by ANSI/API RP 754 and International Oil & Gas Producers (IOGP) Report 456: Process Safety Recommended Practice on Key Performance Indicators.