WTE vs. Landfill Diversion Calculator
Diverting waste from landfill to waste-to-energy is not just about avoiding landfill space — it is a meaningful greenhouse gas story. Landfilled organic waste decomposes anaerobically and generates methane, a gas roughly 28-36x more potent than CO2 over 100 years, even after accounting for gas capture systems. This calculator takes the waste you divert from landfill to WTE each year, a representative landfill emission factor, and a representative WTE net emission factor, then reports the landfill GHG emissions avoided, the WTE GHG emissions incurred, and the net GHG reduction from diversion. For the facility-side emissions breakdown behind the WTE factor, see our WTE Emissions & Carbon Intensity Calculator, and for the methane-capture counterpoint on the landfill side, see our Landfill Gas-to-Energy Calculator.
The annual tonnage diverted from landfill to a waste-to-energy facility. A mid-size mass-burn plant processes roughly 500,000 tons/year; this default reflects a smaller service-area diversion scenario.
Representative planning-level estimate based on EPA WARM-style landfill lifecycle emissions, accounting for typical gas capture rates. Actual figures vary significantly by landfill gas capture system and local conditions -- consult EPA's WARM tool for a project-specific analysis.
Representative planning-level estimate reflecting WTE's net lifecycle emissions after biogenic carbon exclusion and avoided fossil-grid-generation credit.
waste diverted to WTE (tons/year) × landfill emission factor (metric tons CO2e/ton)
waste diverted to WTE (tons/year) × WTE net emission factor (metric tons CO2e/ton)
landfill GHG emissions (metric tons CO2e) − WTE GHG emissions (metric tons CO2e)
These are representative, illustrative emission factors, not a substitute for EPA's WARM (Waste Reduction Model) tool, which provides authoritative, project-specific lifecycle GHG comparisons based on your actual waste composition, landfill gas capture rate, and local grid emissions factor.
Results update live as you type. For planning and field-check estimates — always verify against applicable standards and equipment ratings.
How we calculate this →Diverting waste from landfill to WTE isn't just about avoiding landfill space -- it's a meaningful greenhouse gas story. Landfilled waste generates methane as it decomposes, a gas roughly 28-36x more potent than CO2 over 100 years, even accounting for gas capture systems. Diverting 100,000 tons annually from landfill to WTE in this example avoids roughly 55,000 metric tons of CO2-equivalent emissions per year -- though exact figures depend heavily on specific landfill gas capture rates and WTE facility efficiency. EPA's WARM tool provides the authoritative, project-specific version of this comparison.
How WTE vs. landfill diversion GHG reduction is calculated
This calculator compares the greenhouse gas emissions of landfilling a ton of waste against diverting that same ton to a waste-to-energy facility, tying three inputs together: the waste diverted to WTE in tons per year, the landfill emission factor in metric tons CO2e per ton, and the WTE net emission factor in metric tons CO2e per ton. Three quantities tie the calculation together.
Landfill GHG Emissions (metric tons CO2e) = Waste Diverted to WTE (tons/year) × Landfill Emission Factor (metric tons CO2e/ton). Organic waste decomposing anaerobically inside a landfill generates methane, a greenhouse gas roughly 28-36x more potent than CO2 over a 100-year period. Even landfills with active gas collection systems capture only a portion of that methane, so a representative lifecycle emission factor captures the net climate impact per ton landfilled. Multiplying the tonnage diverted from landfill by that factor gives the emissions that would have occurred had the waste been landfilled instead. At the defaults (100,000 tons/year, 0.85 factor), that is 100,000 × 0.85 = 85,000 metric tons CO2e.
WTE GHG Emissions (metric tons CO2e) = Waste Diverted to WTE (tons/year) × WTE Net Emission Factor (metric tons CO2e/ton). WTE combustion releases mostly CO2, much of it biogenic (recently cycled atmospheric carbon from paper, food, and yard waste) and therefore excluded from net climate accounting, and it also earns an avoided-emissions credit for displacing fossil grid generation. The net emission factor reflects that combined lifecycle position per ton combusted. Multiplying the diverted tonnage by that factor gives the emissions actually incurred by sending the waste to WTE. At the defaults (100,000 tons/year, 0.30 factor), that is 100,000 × 0.30 = 30,000 metric tons CO2e.
Net GHG Reduction from Diversion (metric tons CO2e) = Landfill GHG Emissions (metric tons CO2e) − WTE GHG Emissions (metric tons CO2e). Subtracting the WTE emissions from the landfill emissions that would have occurred gives the net greenhouse gas benefit of diverting that tonnage from landfill to WTE. At the defaults (85,000 landfill, 30,000 WTE), that is 85,000 − 30,000 = 55,000 metric tons CO2e avoided per year.
Two notes on the model. First, both emission factors are representative, illustrative planning-level estimates, not a substitute for EPA's WARM (Waste Reduction Model) tool, which provides authoritative, project-specific lifecycle GHG comparisons based on actual waste composition, landfill gas capture rate, and local grid emissions factor. Second, the landfill emission factor is by far the most sensitive and uncertain input: landfills with strong, well-maintained gas capture and utilization systems have meaningfully lower net emissions than landfills with poor or no gas capture, so the comparison can shift substantially depending on which landfill the waste is being diverted from. Data sources: EPA WARM (Waste Reduction Model) methodology and landfill lifecycle emissions factors; landfill methane generation and gas capture data from EPA landfill gas emissions inventory and state environmental agency reports; WTE net lifecycle emissions from EPA waste-to-energy facility data and lifecycle assessment studies; methane global warming potential from IPCC climate science reports; landfill gas capture rate data from EPA landfill gas utilization reports and state waste management agencies; WTE vs. landfill comparison studies from NREL and waste management research literature. Verification: with defaults (100,000 tons/year, 0.85 landfill factor, 0.30 WTE factor), Landfill GHG Emissions = 85,000 metric tons CO2e, WTE GHG Emissions = 30,000 metric tons CO2e, Net GHG Reduction from Diversion = 55,000 metric tons CO2e.