This page is a listing of the values for the 2025 version of emission factors in SIMAP. n/a indicates that an emissions factor is not applicable or not available. Please contact us at simap@unh.edu with any questions. NOT YET UPDATED
| Category | Carbon dioxide (CO2) | Methane (CH4) | Nitrous oxide (N2O) | Biogenic CO2 | Nitrogen oxides (NOx) | Other N |
|---|---|---|---|---|---|---|
| On-Campus Stationary Sources: Residual Oil (#5-6) | 11.240756 kg CO2/gallon | 0.0015793 kg CH4/gallon | 0.000095 kg N2O/gallon | 0.006767 kg NOx/gallon | ||
| On-Campus Stationary Sources: Distillate Oil (#1-4) | 10.185423 kg CO2/gallon | 0.0014494 kg CH4/gallon | 0.000087 kg N2O/gallon | 0.006210 kg NOx/gallon | ||
| On-Campus Stationary Sources: Natural Gas | 52.91 kg CO2/MMBtu | 0.0052753 kg CH4/MMBtu | 0.000106 kg N2O/MMBtu | 0.030711 kg NOx/MMBtu | ||
| On-Campus Stationary Sources: LPG (Propane) | 4.8345305 kg CO2/gallon | 0.0008099 kg CH4/gallon | 0.0000487 kg N2O/gallon | 0.003626 kg NOx/gallon | ||
| On-Campus Stationary Sources: Coal (Steam Coal) | 1,735.8474 kg CO2/short ton | 0.1907858 kg CH4/short ton | 0.0286179 kg N2O/short ton | 15.9458 kg NOx/short ton | ||
| On-Campus Stationary Sources: Incinerated Waste | 178.6 kg CO2/short ton | 0 kg CH4/short ton | 0.1342282 kg N2O/short ton | 201.4 kg CO2/short ton | 2.472076 kg NOx/short ton | |
| On-Campus Stationary Sources: Wood Chips | 0 kg CO2/short ton | 5.5327137 kg CH4/short ton | 0.07377 kg N2O/short ton | 1639.50747 kg CO2/short ton | 0.527414 kg NOx/short ton | |
| On-Campus Stationary Sources: Wood Pellets | 0 kg CO2/short ton | 5.5327137 kg CH4/short ton | 0.07377 kg N2O/short ton | 1639.50747 kg CO2/short ton | 0.527414 kg NOx/short ton | |
| On-Campus Stationary Sources: Grass Pellets | 0 kg CO2/short ton | 5.5327137 kg CH4/short ton | 0.07377 kg N2O/short ton | 1639.50747 kg CO2/short ton | 0.527414 kg NOx/short ton | |
| On-Campus Stationary Sources: Residual BioHeat | 8.727133 kg CO2/gallon | 0.0015327 kg CH4/gallon | 0.000092 kg N2O/gallon | 2.18178316 kg CO2/gallon | 0.006567 kg NOx/gallon | |
| On-Campus Stationary Sources: Distillate BioHeat | 8.032257 kg CO2/gallon | 0.001429 kg CH4/gallon | 0.000086 kg N2O/gallon | 2.00338045 kg CO2/gallon | 0.006122 kg NOx/gallon | |
| On-Campus Stationary Sources: Ethanol | 0 kg CO2/gallon | 0.000352 kg CH4/gallon | 0.000111 kg N2O/gallon | 5.75 kg CO2/gallon | ||
| Direct Transportation Sources: Gasoline Fleet | 8.78 kg CO2/gallon | 0.0002567 kg CH4/gallon | 0.000213 kg N2O/gallon | 0.00935 kg NOx/gallon | ||
| Direct Transportation Sources: Diesel Fleet | 10.21 kg CO2/gallon | 0.0001480 kg CH4/gallon | 0.000258 kg N2O/gallon | 0.02624 kg NOx/gallon | ||
| Direct Transportation Sources: Natural Gas Fleet | 52.91 kg CO2/MMBtu | 0.014 kg CH4/MMBtu | 0.000412 kg N2O/MMBtu | 0.044716 kg NOx/MMBtu | ||
| Direct Transportation Sources: E85 Fleet | 2.2828 kg CO2/gallon | 0.0003137 kg CH4/gallon | 0.000135 kg N2O/gallon | 4.255 kg CO2/gallon | 0.009212 kg NOx/gallon | |
| Direct Transportation Sources: B5 Fleet | 9.6995 kg CO2/gallon | 0.0001666 kg CH4/gallon | 0.000246 kg N2O/gallon | 0.4725 kg CO2/gallon | 0.026238 kg NOx/gallon | |
| Direct Transportation Sources: B20 Fleet | 8.168 kg CO2/gallon | 0.0002223 kg CH4/gallon | 0.000210 kg N2O/gallon | 1.89 kg CO2/gallon | 0.026238 kg NOx/gallon | |
| Direct Transportation Sources: B100 | 0 kg CO2/gallon | 0.0005198 kg CH4/gallon | 0.000016 kg N2O/gallon | 9.45 kg CO2/gallon | 0.026238 kg NOx/gallon | |
| Direct Transportation Sources: Hydrogen | 0 kg CO2/MMBtu | 0 kg CH4/MMBtu | 0 kg NOx/MMBtu | |||
| Agriculture Sources: Fertilizer: Synthetic | 0.009444 kg N2O/lb | 0.2494756 kg N/lb | ||||
| Agriculture Sources: Fertilizer: Organic | 0.010157 kg N2O/lb | 0.2494756 kg N/lb | ||||
| Agriculture Sources: Animal Husbandry: Dairy Cows | 209.558710 kg CH4/head | 1.69922301 kg N2O/head | ||||
| Agriculture Sources: Animal Husbandry: Beef Cows | 76.0932268 kg CH4/head | 0.37571128 kg N2O/head | ||||
| Agriculture Sources: Animal Husbandry: Swine | 13.1000109 kg CH4/head | 0.09132794 kg N2O/head | ||||
| Agriculture Sources: Animal Husbandry: Goats | 9.14409222 kg CH4/head | 0.03602306 kg N2O/head | ||||
| Agriculture Sources: Animal Husbandry: Sheep | 9.39486673 kg CH4/head | 0.19743337 kg N2O/head | ||||
| Agriculture Sources: Animal Husbandry: Horses | 18.9647853 kg CH4/head | 0.09647853 kg N2O/head | ||||
| Agriculture Sources: Animal Husbandry: Poultry | 0.04801193 kg CH4/head | 0.00382317 kg N2O/head | ||||
| Commuting: Automobile | 0.306 kg CO2/mile | 0.000009 kg CH4/mile | 0.000006 kg N2O/mile | 0.000359 kg NOx/mile | ||
| Commuting: Carpool | 0.153 kg CO2/passenger mile | 0.0000045 kg CH4/passenger mile | 0.000003 kg N2O/mile | 0.000179 kg NOx/mile | ||
| Commuting: Public Bus | 0.071 kg CO2/passenger mile | 0.000005 kg CH4/passenger mile | 0.0000021 kg N2O/passenger mile | 0.000848 kg NOx/passenger mile | ||
| Commuting: Light Rail | 0.093 kg CO2/passenger mile | 0.0000075 kg CH4/passenger mile | 0.000001 kg N2O/passenger mile | 0.000121 kg NOx/passenger mile | ||
| Commuting: Commuter Rail | 0.133 kg CO2/passenger mile | 0.0000105 kg CH4/passenger mile | 0.0000026 kg N2O/passenger mile | 0.000262 kg NOx/passenger mile | ||
| Directly Financed Outsourced Travel: Air: Faculty / Staff | 0.207 kg CO2/passenger mile | 0.0000064 kg CH4/passenger mile | 0.0000066 kg N2O/passenger mile | 0.000195 kg NOx/passenger mile | ||
| Directly Financed Outsourced Travel: Air: Students | 0.207 kg CO2/passenger mile | 0.0000064 kg CH4/passenger mile | 0.0000066 kg N2O/passenger mile | 0.000195 kg NOx/passenger mile | ||
| Directly Financed Outsourced Travel: Ground: Train | 0.113 kg CO2/passenger mile | 0.0000092 kg CH4/passenger mile | 0.0000026 kg N2O/passenger mile | 0.000434 kg NOx/passenger mile | ||
| Directly Financed Outsourced Travel: Ground: Taxi / Ferry / Rental Car | 0.306 kg CO2/mile | 0.000008 kg CH4/mile | 0.000006 kg N2O/mile | 0.000359 kg NOx/mile | ||
| Directly Financed Outsourced Travel: Ground: Public Bus | 0.071 kg CO2/passenger mile | 0.000005 kg CH4/passenger mile | 0.0000021 kg N2O/passenger mile | 0.000848 kg NOx/passenger mile | ||
| Directly Financed Outsourced Travel: Ground: Charter Bus - Diesel | 3.108722 kg CO2/mile | 0.0000051 kg CH4/mile | 0.0000346 kg N2O/mile | |||
| Directly Financed Outsourced Travel: Ground: Charter Bus - CNG | 2.523174 kg CO2/mile | 0.0002753 kg CH4/mile | 0.000017 kg N2O/mile | |||
| Directly Financed Outsourced Travel: Ground: Alternative Fuel Bus | 0 kg CO2/passenger mile | 0 kg CH4/passenger mile | 0 kg NOx/mile | |||
| Directly Financed Outsourced Travel: Ground: Mileage Reimbursement | 0.306 kg CO2/mile | 0.000009 kg CH4/mile | 0.000006 kg N2O/mile | 0.000359 kg NOx/mile | ||
| Study Abroad: Air Travel | 0.163 kg CO2/passenger mile | 0.0000006 kg CH4/passenger mile | 0.0000052 kg N2O/mile | 0.000195 kg NOx/mile | ||
| Student Travel to/from Home: Automobile | 0.306 kg CO2/mile | 0.000009 kg CH4/mile | 0.000006 kg N2O/mile | 0.000359 kg NOx/mile | ||
| Student Travel to/from Home: Carpool | 0.153 kg CO2/passenger mile | 0.0000045 kg CH4/passenger mile | 0.000003 kg N2O/mile | 0.000179 kg NOx/mile | ||
| Student Travel to/from Home: Public Bus | 0.071 kg CO2/passenger mile | 0.000005 kg CH4/passenger mile | 0.0000021 kg N2O/passenger mile | 0.000848 kg NOx/passenger mile | ||
| Student Travel to/from Home: Train | 0.113 kg CO2/passenger mile | 0.0000092 kg CH4/passenger mile | 0.0000026 kg N2O/passenger mile | 0.000434 kg NOx/passenger mile | ||
| Student Travel to/from Home: Air Travel | 0.207 kg CO2/passenger mile | 0.0000064 kg CH4/passenger mile | 0.0000066 kg N2O/passenger mile | 0.000195 kg NOx/passenger mile | ||
| Solid Waste: Incinerated Waste: Mass Burn | 390 kg CO2/short ton | 0.1465201 kg N2O/short ton | ||||
| Solid Waste: Incinerated Waste: Refuse Derived Fuel (RDF) | 390 kg CO2/short ton | 0.1465201 kg N2O/short ton | ||||
| Solid Waste: Landfilled Waste: No CH4 Recovery | 20 kg CO2/short ton | 22.4 kg CH4/short ton | ||||
| Solid Waste: Landfilled Waste: CH4 Recovery and Flaring | 20 kg CO2/short ton | 22.4 kg CH4/short ton | ||||
| Solid Waste: Landfilled Waste: CH4 Recovery and Electric Generation | 20 kg CO2/short ton | 22.4 kg CH4/short ton | ||||
| Wastewater: Septic System | 0.000107 kg CH4/gallon | 0.0000014 kg N2O/gallon | 0.000161 kg N/gallon | |||
| Wastewater: Central Treatment System: Aerobic | 0.00001788 kg CH4/gallon | 0.00000551 kg N2O/gallon | 0.000142 kg N/gallon | |||
| Wastewater: Central Treatment System: Anaerobic | 0.00026736 kg CH4/gallon | 0.000142 kg N/gallon | ||||
| Wastewater: Central Treatment System: Aerobic + Anaerobic Digestion | 0.0000191 kg CH4/gallon | 0.00000551 kg N2O/gallon | 0.0000189 kg N/gallon | |||
| Wastewater: Central Treatment System: Anaerobic + Anaerobic Digestion | 0.00026858 kg CH4/gallon | 0.0000189 kg N/gallon | ||||
| Paper: Uncoated Freesheet: 0% recycled | 1.365993 kg CO2/lb | |||||
| Paper: Coated Freesheet: 0% recycled | 1.379148 kg CO2/lb | |||||
| Paper: Uncoated Groundwood: 0% recycled | 1.617964 kg CO2/lb | |||||
| Paper: Coated Groundwood: 0% recycled | 1.5184 kg CO2/lb | |||||
| Paper: Supercalendered: 0% recycled | 1.645406 kg CO2/lb | |||||
| Paper: Corrugated Unbleached: 0% recycled | 1.287975 kg CO2/lb | |||||
| Paper: Corrugated Semibleached: 0% recycled | 1.309748 kg CO2/lb | |||||
| Paper: Corrugated Bleached: 0% recycled | 1.424734 kg CO2/lb | |||||
| Paper: Paperboard SBS: 0% recycled | 1.574192 kg CO2/lb | |||||
| Paper: Paperboard CUK: 0% recycled | 1.510463 kg CO2/lb | |||||
| Paper: Paperboard Uncoated Bleached Kraft: 0% recycled | 1.411806 kg CO2/lb | |||||
| Paper: Paperboard Uncoated Unbleached Kraft: 0% recycled | 1.294326 kg CO2/lb | |||||
| Paper: Paperboard Coated Recycled: 0% recycled | 0.632761 kg CO2/lb | |||||
| Sinks: Compost: Agricultural Waste | -294 kg CO2/short ton | -18.14 kg N/lb | ||||
| Sinks: Compost: Dining Waste | -294 kg CO2/short ton | -9.436 kg N/short ton |
*eCO2 factors combined the CO2, CH4, and N2O emissions into a single emissions factor normalized to carbon dioxide equivalents (eCO2). Emission factors are only listed as eCO2 when the reference source only provides eCO2 factors. Otherwise, the emissions are listed in their constituent parts (e.g., CO2, CH4, N2O) and then converted to CO2-equivalents in SIMAP based on the GWP version you select on the Data Mgmt tab.