Model — EIO-LCA Explorer (CEE 226)

The site serves one model: U.S. EPA USEEIO v2.0.1, 411-commodity detail, called USEEIOv2.0.1-411. It is the successor to the U.S. models that CMU's eiolca.net hosted. The version is pinned for the quarter; every page and every copied result names it. The same model is also served by eiolca.net (online again since September 2026, with greenhouse-gas and economic results only), which remains the place for the older 1992–2007 U.S. models and for the Canada, Germany, Spain, Peru and China models.

What the model contains

Economy. The 2012 U.S. benchmark input-output accounts from the Bureau of Economic Analysis, in producer prices, at 411-commodity detail.
Resource use and emissions. Satellite tables from U.S. sources of about the same period: greenhouse gases, criteria air pollutants, water withdrawals, land use, minerals, energy, waste, pesticides and toxic releases, plus employment and value added. Sources are documented by EPA in the references below.
Indicators. 23 indicators, listed in the table. Impact potentials use the TRACI 2.1 characterization method.
Price adjusters. Purchaser-to-producer (Φ) and price-year (ρ) adjusters for 2002 to 2018, used by the tool to bring your input to 2012 producer prices.

Indicator groups and indicators in USEEIOv2.0.1-411.
Group	Indicators
Impact Potential	Acidification Potential (ACID), Eutrophication Potential (EUTR), Freshwater Ecotoxicity Potential (ETOX), Greenhouse Gases (GHG), Human Health - Cancer (HCAN), Human Health - Noncancer (HNCN), Human Health - Respiratory Effects (HRSP), Human Health Toxicity (HTOX), Ozone Depletion (OZON), Smog Formation Potential (SMOG)
Waste Generated	Commercial Construction and Demolition Debris (CCDD), Commercial Municipal Solid Waste (CMSW), Commercial RCRA Hazardous Waste (CRHW)
Resource Use	Energy Use (ENRG), Freshwater withdrawals (WATR), Land use (LAND), Minerals and Metals Use (MNRL), Nonrenewable Energy Use (NNRG), Renewable Energy Use (RNRG)
Chemical Releases	Hazardous Air Pollutants (HAPS), Pesticides (PEST)
Economic & Social	Jobs Supported (JOBS), Value Added (VADD)

Units and definitions are in Documentation.

Files served

The model is served as static JSON files under api/USEEIOv2.0.1-411/: the sector list, the indicator list, the flow list, and the matrices A (direct requirements), L (Leontief inverse), D (impact per dollar of output), N (impact per dollar of final demand, including the supply chain) and N_d (the direct part). The files are the export of EPA's model build as packaged by the ModelEarth project. The teaching team verified them against EPA's published model workbook; the largest relative deviation found was 5 × 10⁻¹⁶.

Differences from CMU's 2002 model

2012 economy and 411 commodities, against 2002 and 428 sectors.
Indicator names and groups follow EPA and TRACI 2.1. There is no "Energy" indicator equal to the old one; see Documentation.
Criteria pollutants are individual flows (sulfur dioxide, nitrogen dioxide, carbon monoxide, lead, two particulate sizes) rather than a category.
Emission inventories are about a decade newer, so most air pollutant results are lower than 2002 results for the same sector. Part of any difference is real change; part is definition.

Explore the model

Three views from EPA's useeio-widgets show the model's data directly.

Impact profile: bar chart of one or more sectors across the indicators.
Sector heatmap: all 411 sectors against all indicators.
IO tables: what a sector buys and who buys from it, first tier only, ranked by magnitude. This is the A matrix, not the Leontief inverse.

References

Ingwersen, W. W. et al. (2022). USEEIO v2.0, The US Environmentally-Extended Input-Output Model v2.0. Scientific Data 9, 194.
U.S. EPA, USEEIO model documentation and code: github.com/USEPA/USEEIO and github.com/USEPA/useeior.