Waymark / Routes / campd.epa.gov retrieve hourly facility-level CO2, SO2, and NOx emissions for a power plant from the EPA Clean Air Markets Program Data (CAMPD) API
domain: campd.epa.gov · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checked community attestations: 0✓ / 0✗
Steps Register for a free EPA CAMPD API key via the Clean Air Markets API portal Look up the facility's ORISPL/facility ID and unit IDs via the facilities/attributes endpoint Call the emissions API's hourly endpoint with the facility ID, unit ID, and date range parameters Include the API key as required by the Swagger-documented auth scheme Parse returned fields for gross load, heat input, and CO2/SO2/NOx mass and rate values per operating hour Paginate using the API's page/per-page parameters for multi-year pulls Known gotchas Data availability depends on which EPA program (Acid Rain Program, CSAPR, etc.) covers the unit — not all fossil units report all three pollutants Hourly CEMS data has a reporting lag of roughly one quarter before being finalized in CAMPD
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