The USA EPA has developed a GHG equivalencies calculator to help translate these abstract measurements (pounds and metric tons of CO2) into more concrete examples.
Once you've estimated your emissions using SFPUC's calculator, you can visit the EPA's website, click the tab for "If You Have Emission Data",
and enter your CO2 emissions on the appropriate line. Here is a link to the EPA site.
More details about the electricity the SFPUC supplies to its retail customers is available here.
* Emissions factors:
Hetch Hetchy Power (SFPUC):
Derived from SFPUC 2015 Power Content Label
0.0 pounds CO2 per MWh
PG&E Electricity: 2014 public emissions report: here is link to that report.
435.04 pounds CO2 per MWh
Natural Gas: U.S. Energy Information Administration, Voluntary Reporting of Greenhouse Gases Program
11.7 pounds CO2 per therm
District Steam: 2015 emissions factor provided by NRG Energy Center San Francisco, December 2015
0.195 pounds CO2 per pound of steam
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