General Reporting Protocol

The General Reporting Protocol (GRP) outlines our greenhouse gas accounting policies and required reporting calculation methodologies for the majority of GHG sources. The GRP was developed through a comprehensive public stakeholder process that included over 1,140 individual comments from 107 respondents representing industry, environmental non-governmental organizations, regulatory agencies, individuals and consultants.

Since its initial publication in March of 2008, the GRP has been updated twice. The current version, GRP 2.0, was released in March of 2013. When additional updates and clarifications are identified, we publish an updates and clarifications document, which is designed to serve as a supplement to the latest version of the GRP.

All of these documents are available for download under “Related Documents” on the left-hand side of our website.

Emission Factors

Default emission factors can change over time as the components of energy (electricity, fuel, etc.) change and as emission factor quantification methods are refined. We update our emission factors on an annual basis to reflect the most up-to-date knowledge.

We released the most current version of the default emissions factors, 2015 Climate Registry Default Emission Factors, on April 9, 2015.

Table 14.4 Non-North American Emission Factors for Electricity Generation was updated to include 2012 defaults on April 9, 2015.

Utility-Specific Emission Factors

Registry members reporting to the Electric Power Sector (EPS) Protocol have the option to develop utility-specific retail electric or special power electric delivery metrics that their customers can use when quantifying scope 2 emissions. Registry members who are customers of these utilities can use the relevant emission factors below when reporting scope 2 emissions to The Climate Registry.

 


 

  • System Average
  • Retail Power
  • Special Power
  • Wholesale Power
  • Self-Consumed Power

2005

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Northern States Power Company (Xcel Energy)
  • 1236.79
  • Public Service Company of Colorado (Xcel Energy)
  • 1847.47
  • Southwestern Public Service Company (Xcel Energy)
  • 1693.15

2006

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Northern States Power Company (Xcel Energy)
  • 1225.769
  • Public Service Company of Colorado (Xcel Energy)
  • 1834.244
  • Southwestern Public Service Company (Xcel Energy)
  • 1615.986

2007

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Northern States Power Company (Xcel Energy)
  • 1234.59
  • Public Service Company of Colorado (Xcel Energy)
  • 1752.67
  • Southwestern Public Service Company (Xcel Energy)
  • 1638.03

2009

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Bonneville Power Authority
  • 93.17
  • Northern States Power Company (Xcel Energy)
  • 1104.51
  • Modesto Irrigation District
  • 1036.17
  • Modesto Irrigation District
  • 0.0
  • Modesto Irrigation District
  • 2048.09
  • Pacific Gas & Electric
  • 575.38
  • Public Service Company of Colorado (Xcel Energy)
  • 1611.58
  • Southwestern Public Service Company (Xcel Energy)
  • 1574.10

2010

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Bonneville Power Authority
  • 134.70
  • City of Vernon, Light and Power
  • 775.83
  • Modesto Irrigation District
  • 942.99
  • Modesto Irrigation District
  • 0.0
  • Modesto Irrigation District
  • 2026.12
  • Newmont Nevada Energy Investment
  • 2055.79
  • Northern States Power Company (Xcel Energy)
  • 1033.967
  • Pacific Gas & Electric
  • 444.64
  • Public Service Company of Colorado (Xcel Energy)
  • 1660.079
  • Sacramento Municipal Utility District
  • 526.47
  • Sacramento Municipal Utility District
  • 0.0
  • Sacramento Municipal Utility District
  • 828.58
  • Seattle City Light
  • 45.57
  • Seattle City Light
  • 0.0
  • Seattle City Light
  • 537.64
  • Southwestern Public Service Company (Xcel Energy)
  • 1558.666

2011

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Bonneville Power Authority
  • 47.86
  • City of Vernon, Light and Power
  • 731.49
  • Northern States Power Company (Xcel Energy)
  • 1071.45
  • Pacific Gas & Electric
  • 392.87
  • Public Service Company of Colorado (Xcel Energy)
  • 1618.19
  • Sacramento Municipal Utility District
  • 429.29
  • Sacramento Municipal Utility District
  • 0.0
  • Sacramento Municipal Utility District
  • 795.14
  • Seattle City Light
  • 13.77
  • Seattle City Light
  • 0.0
  • Seattle City Light
  • 218.75
  • Southwestern Public Service Company (Xcel Energy)
  • 1472.69

2012

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • City of Vernon, Light and Power
  • 765.97
  • Metropolitan Water District of Southern California
  • 658.73
  • Metropolitan Water District of Southern California
  • 157.87
  • Pacific Gas & Electric
  • 444.62
  • Sacramento Municipal Utility District
  • 521.73
  • Sacramento Municipal Utility District
  • 0.0
  • Sacramento Municipal Utility District
  • 799.77
  • Seattle City Light
  • 25.62
  • Seattle City Light
  • 0.0
  • Seattle City Light
  • 362.85

2013

Emission

Rates

  • Factor Type
  • Utility
  • Emission Factor (lbs CO2 /MWh)
  • Pacific Gas & Electric
  • 429.638
  • City of Vernon, Light and Power
  • 760.86