Harmonize CEMS and EIA plant (ORISPL) codes?

Not every EIA plant is in CEMS, but I think (almost) every CEMS plant should be in the EIA tables. plants_entity_eia has the list of plant codes the PUDL database knows about.

There are known discrepancies, listed here and in the older eGRID files.

Edit (2020-11-17): The link to the current eGRID changed. The most recent eGRID technical support document is here: https://www.epa.gov/sites/production/files/2020-01/documents/egrid2018_technical_support_document.pdf#page=124 (“Table C-5. Crosswalk of EIA ORISPL ID changes to EPA/CAMD ORISPL IDs”)

Edit (July 2022): This is related to the EPA-EIA crosswalk that is getting integration into PUDL. See issue #1758 and PR #1692

[michaelpburt]

This EPA API may be beneficial. It provides programatic crosswalking between EPA ID’s and EIA plant codes. It is worth exploring as you work to harmonize these two sources.

https://github.com/USEPA/FRS-getfacilities-samples/blob/master/EIA-EPA_Mashup.md

[karldw]

For more detail on the mismatch for plants that appear in both datasets, it might be worth taking a look at the eGRID link at the beginning of this thread.

@zaneselvans, most of the plants that appear in CEMS but not the EIA are generators that closed before the PUDL EIA data starts. There are also a few cogen plants, as @grgmiller pointed out, and some plants that are required to monitor emissions but aren’t electricity generators, like refineries.