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Waste Reduction Model (WARM)

NEW VERSION: Updated March 2015

(Version 13, 3/15)

EPA created WARM to help solid waste planners and organizations track and voluntarily report greenhouse gas emissions

reductions and energy savings from several different waste management practices. The Web-based version of WARM was

last updated March 2015.

Use this worksheet to describe the baseline and alternative MSW management scenarios that you want to compare. Please

follow the steps below to enter your material tonnage information in the input boxes in the tables, and select appropriate

landfill and waste transport characteristics. For information on the definition of each of the WARM material types as well as

data source and year of underlying life-cycle data, please see the WARM materials definitions list.

Tips:

If the listed material is not generated in your community/organization or you do not want to analyze it, leave it

blank or enter 0.

Make sure that the total quantity generated equals the total quantity managed.

If you have any questions, consult the WARM User's Guide.

Steps 1 and 2. Baseline and Alternative Scenarios

Baseline Scenario Alternative Scenario

Material

Tons

Recycled

Tons

Landfilled

Tons

Combusted

Tons

Composted

Tons

Generated

Tons

Source

Reduced

Tons

Recycled

Tons

Landfilled

Tons

Combusted

Tons

Composted

Aluminum

Cans N/A 0 N/A

Aluminum

Ingot N/A 0 N/A

Steel Cans N/A 0 N/A

Copper Wire N/A 0 N/A

Glass N/A 0 N/A

HDPE N/A 0 N/A

LDPE N/A N/A 0 N/A N/A

PET N/A 0 N/A

LLDPE N/A N/A 0 N/A N/A

PP N/A N/A 0 N/A N/A

PS N/A N/A 0 N/A N/A

PVC N/A N/A 0 N/A N/A

PLA N/A 0 N/A

Corrugated

Containers N/A 0 N/A

Magazines /

Third-class

mail

N/A 0 N/A

Newspaper N/A 0 N/A

Office Paper N/A 0 N/A

Phonebooks N/A 0 N/A

Textbooks N/A 0 N/A

Dimensional

Lumber N/A 0 N/A

Mediumdensity

Fiberboard

N/A 0 N/A

Wastes - Resource Conservation - WARM

http://epa.gov/epawaste/conserve/tools/warm/Warm_Form.html

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Baseline Scenario Alternative Scenario

Material

Tons

Recycled

Tons

Landfilled

Tons

Combusted

Tons

Composted

Tons

Generated

Tons

Source

Reduced

Tons

Recycled

Tons

Landfilled

Tons

Combusted

Tons

Composted

Food Waste

(non-meat)1

N/A 0 N/A

Food Waste

(meat

only)1

N/A 0 N/A

Yard

Trimmings N/A 0 N/A N/A

Grass N/A 0 N/A N/A

Leaves N/A 0 N/A N/A

Branches N/A 0 N/A N/A

Mixed Paper

(general) N/A 0 N/A

Mixed Paper

(primarily

residential)

N/A 0 N/A

Mixed Paper

(primarily

from

offices)

N/A 0 N/A

Mixed

Metals N/A 0 N/A

Mixed

Plastics N/A 0 N/A

Mixed

Recyclables N/A 0 N/A N/A

Food Waste1 N/A 0 N/A

Mixed

Organics N/A 0 N/A N/A

Mixed MSW N/A N/A 0 N/A N/A N/A

Carpet N/A 0 N/A

Personal

Computers N/A 0 N/A

Clay Bricks N/A N/A N/A 0 N/A N/A N/A

Concrete 2 N/A N/A 0 N/A N/A N/A

Fly Ash 3 N/A N/A 0 N/A N/A N/A

Tires 4 N/A 0 N/A

Asphalt

Concrete N/A N/A 0 N/A N/A

Asphalt

Shingles N/A 0 N/A

Drywall N/A N/A 0 N/A N/A

Fiberglass

Insulation N/A N/A N/A 0 N/A N/A N/A

Vinyl

Flooring N/A N/A 0 N/A N/A

Wood

Flooring N/A N/A 0 N/A N/A

Please enter data in short tons (1 short ton = 2,000 lbs.)

Please refer to the User's Guide if you need assistance completing this table.

1 Excel version of WARM allows users to assess energy and environmental impacts for more detailed food waste types.

2 Recycled concrete used as aggregate in the production of new concrete

3 Recycled fly ash is utilized to displace Portland cement in concrete production.

4 Recycling tires is defined in this analysis as using tires for crumb rubber applications and tire-derived aggregate uses in civil engineering applications.

Step 3. Landfill Characteristics

The emissions from landfilling depend on whether the landfill where your waste is disposed has a landfill gas (LFG) control

system. If you do not know whether your landfill has LFG control, select "National Average," which calculates emissions

based on the proportions of landfills with LFG control in 2012. If your landfill does not have a LFG system, select “No LFG

Recovery.” If a LFG system is in place at your landfill, select “LFG Recovery” and click one of the indented buttons to

indicate whether LFG is recovered for energy or flared. Note that the Web-based WARM calculator assumes that the “LFG

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Recovery” option includes bulk MSW decay rates for national average landfill moisture conditions and “typical” landfill gas

collection system operation. These assumptions are the default assumptions in the WARM Excel version.

 National Average

 No LFG Recovery

 LFG Recovery

 Recover for energy

 Flare

Step 4. Waste Transport Characteristics

Emissions that occur during transport of materials to the management facility are included in this model. You may use

default transport distances, 20 miles, or provide information on the transport distances for the various MSW management

options.

 Use default distance

 Define distance

Management Option Distance (miles)

Landfill

Combustion

Recycling

Composting

Step 5. Results Output

 Metric Tons of Carbon Dioxide Equivalent (MTCO2E)

 Metric Tons of Carbon Equivalent (MTCE)

 Units of Energy (million BTU)

View Emission/Energy Factors based on your selection above.

The following inputs are optional and may be used to customize your summary report.

Organization:

Name:

Reporting Period: / / To / / 

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