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City of Pleasanton <br />GHG Inventory, Forecast, and Targets Methodology and Calculations <br /> <br />22 <br />Table 12 Water and Wastewater Emissions for Year 2017 <br />Source Activity Data <br />Kilowatts per <br />Million Gallons1 Kilowatt Hours <br />Emission Factor <br />(MT CO2e/MWh) <br />Total <br />Emissions <br />(MT CO2e) <br />Water Use 1,750 <br />Zone 7 Water Agency 2,925.82 MG 4,036.57 11,810,278 0.09635 1,138 <br />City of Pleasanton 1,478.55 MG 3,978.75 5,882,769 0.09635 567 <br />Dublin-San Ramon <br />Services District 173.48 MG 2,320.00 402,481 0.09635 39 <br />City of Livermore 21.89 MG 2,320.00 50,778 0.09635 5 <br />Wastewater Generation 1,188 <br />Dublin-San Ramon <br />Services District2 <br />1,878 MG 1,722 3,234,519 .09635 310 <br />Process Nitrous Oxide <br />Emissions <br />0.2574 MT N2O – – 1 N2O to 265 CO2e 68 <br />Stationary Methane <br />Emissions <br />2.29 MT CH4 – – 1 CH4 to 28 CO2e 64 <br />Effluent Discharge 2.814 MT N2O – – 1 N2O to 265 CO2e 746 <br />Total 2,938 <br />MWh: megawatt hours; MT: metric tons; CO2e: carbon dioxide equivalent; CH4: methane; N2O: nitrous oxide; MG: millions of gallons; <br />kWh: kilowatt hours <br />1 Calculated based off of the data regarding the processes used for water and wastewater generation. Water factors included: average <br />depth of groundwater wells (575 ft), and sources of water (surface water, groundwater, State water project, recycled water). <br />Wastewater factors included: type of wastewater treatment technology (activated sludge and digesters), use of pumps to dispose of <br />wastewater, wastewater discharge into the San Francisco Bay, and number of septic tanks in Pleasanton (177 in 2017) <br />2 Indirect emissions from electricity use during the wastewater generation process. <br />