EPA National Emissions Inventory (NEI)
EPA_NEIfree10 data-quality rules for the EPA National Emissions Inventory (NEI), reported by state/local/tribal agencies via the Emissions Inventory System (EIS). Covers required facility/unit/process identifiers, valid SCC and pollutant codes, non-negative emissions, units of measure, calculation method, reporting year, and duplicate suppression. Use it to validate EIS submissions before upload.
Checks included (10)
Required Identifiers Present
Each emissions record must carry the EIS facility id, unit/process id, pollutant code, and emissions value.
Calculation Method Present(calculation_method)
Each emissions value must report the calculation method code used to derive it.
Inventory Year Present(inventory_year)
The emissions record must specify the inventory year.
SCC Is Valid
The Source Classification Code (SCC) must be a valid EPA SCC.
Pollutant Code Is Valid
The pollutant code must be a valid EPA pollutant (CAS / SmokeName) from the EIS pollutant list.
Facility Exists in EIS
The EIS facility id must exist in the EIS facility inventory.
Emissions Are Non-Negative(emissions_value)
Reported emissions values cannot be negative.
Process Throughput Is Non-Negative(throughput)
Process activity/throughput values, when reported, cannot be negative.
Unit of Measure Is Valid(unit_of_measure)
The emissions unit of measure must be a valid EIS UOM (TON, LB, KG, MG).
One Value per Process / Pollutant / Year(emissions_dedup_key)
Emissions should be reported once per facility, process, pollutant, and inventory year.