flowsa attributes resource use, waste, emissions, and loss to economic sectors. It produces standard tabular formats with sector attribution data using pandas dataframes.

For installation instructions, example code, and further explanation of the code, see the wiki.

flows: represent the physical movement of material, energy, entities or money as input or output to or between activities. The terms flows comes from life cycle assessment (ISO 14044).

sectors: generally these are economic sectors generating economic activity, but are extended here to include households and institutional end users. Using the BEA definitions in input-output tables, these can be either industries or commodities.

attribution: The sectors through which activity uses, produces or receives the flows (input or output).

*USD unit value varies by year and is reported like 'USD2012'

Source data are imported and formatted into FlowByActivity datasets. The source data are only modified to meet column formatting criteria, meaning units are not standardized across "Class" types.

Source dataset names are consistent across (1) the FlowByActivity dataset 'SourceName' columns, (2) the parquet file names, (3) the Crosswalk file names, and (4) the Source Catalog information. Source names are comprised of two or three components. The first part of the name is the agency that published the data. The second component is the name or acronym of the published dataset. The third piece of the naming schema, if it exists, is the topic of data parsed from the original dataset. Of the four FlowByActivity datasets imported from the U.S. Department of Agriculture (USDA), three are data pulled from the same dataset, the Census of Agriculture (CoA). To make data easier to find, the CoA data is separated by topic (Cropland, Livestock, Product Market Value). As the FlowByActivity datasets are grouped by topic, some of the parquets contain multiple class types, meaning the Class type should be specified when calling on the data. The USDA_CoA_Cropland dataframe includes acreage information for crops (Class = Land) and the number of farms that grow a particular crop (Class = Other).

Environmental data attributed to North American Industrial Classification (NAICS) Codes, formatted into standard FlowBySector datasets.

The United States Environmental Protection Agency (EPA) GitHub project code is provided on an "as is" basis and the user assumes responsibility for its use. EPA has relinquished control of the information and no longer has responsibility to protect the integrity , confidentiality, or availability of the information. Any reference to specific commercial products, processes, or services by service mark, trademark, manufacturer, or otherwise, does not constitute or imply their endorsement, recommendation or favoring by EPA. The EPA seal and logo shall not be used in any manner to imply endorsement of any commercial product or activity by EPA or the United States Government.