These maps illustrate the biomass resources available in
the United States by county. Biomass feedstock data are analyzed both statistically and
graphically using a geographic information system (GIS). The following feedstock
categories are evaluated: crop residues, forest residues, primary and secondary mill
residues, urban wood waste, and methane emissions from manure management, landfills, and
domestic wastewater treatment.
Biomass Resources in the United States
Total Resources by
Total Biomass per Square
Kilometer - These maps estimate the biomass resources
currently available in the United States by county. They include the following feedstock
categories: crop residues (5 year average: 2003-2007) forest and primary mill residues
(2007), secondary mill and urban wood waste (2002), methane emissions from landfills
(2008), domestic wastewater treatment (2007), and animal manure (2002). For more
information on the data development, please refer to
Although, the document contains the methodology for the development of an older
assessment, the information is applicable to this assessment as well. The difference is
only in the data's time period.
- The following crops were included in this analysis: corn, wheat,
soybeans, cotton, sorghum, barley, oats, rice, rye, canola, dry edible beans, dry edible
peas, peanuts, potatoes, safflower, sunflower, sugarcane, and flaxseed. The quantities of
crop residues that can be available in each county are estimated using total grain
production, crop to residue ratio, moisture content, and taking into consideration the
amount of residue left on the field for soil protection, grazing, and other agricultural
activities. Source: USDA, National Agricultural Statistics Service; five-year average:
- This category includes logging residues and other removable material left
after carrying out silviculture operations and site conversions. Logging residue comprises
unused portions of trees, cut or killed by logging and left in the woods. Other removable
materials are the unutilized volume of trees cut or killed during logging operations.
Source: USDA, Forest Service's Timber Product Output database, 2007.
mill residues - Primary mill residues include wood materials
(coarse and fine) and bark generated at manufacturing plants (primary wood-using mills)
when round wood products are processed into primary wood products, such as slabs, edgings,
trimmings, sawdust, veneer clippings and cores, and pulp screenings. Source: USDA, Forest
Service's Timber Product Output database, 2007.
Secondary mill residues - Secondary mill residues include wood
scraps and sawdust from woodworking shops — furniture factories, wood container and pallet
mills, and wholesale lumberyards. Data on the number of businesses by county was gathered
from the U.S. Census Bureau, 2009 County Business Patterns.
Urban wood waste includes wood residues from MSW (wood chips and pallets), utility tree
trimming and/or private tree companies, and construction and demolition sites. Source:
U.S. Census Bureau, 2010 Population data; BioCycle Journal: "State of Garbage in America",
January 2008; County Business Patterns 2009.
Methane emissions from landfills - The methane emissions
are estimated for each landfill considering total waste in place, landfill size, and
location (arid or non-arid climate), and then aggregated to county level. Note:
this dataset doesn't include all landfills in the United States due to gaps in either
precise geographic location or waste in place. Source: EPA, Landfill Methane Outreach
Program (LMOP), April 2008.
emissions from manure management - The following animal
types were included in this analysis: dairy cows, beef cows, hogs and pigs, sheep,
chickens and layers, broilers, and turkey. The methane emissions were calculated by animal
type and manure management system at a county level. Source: USDA, National Agricultural
Statistics Service, 2002 data.
Methane emissions from domestic wastewater treatment - The
methane emissions are estimated using the methodology from the EPA Inventory of U.S.
Greenhouse Gas Emissions and Sinks: 1990-2003. Source: U.S. Census Bureau, 2007 County