Step-by-step with formula, worked 5-facility example, and Python/JavaScript code. GHG Protocol compliant.
Interactive calculator using your local grid emission factor instead of the national average. Shows 6x variation across US regions.
Complete reference table - CO₂e, carbon-free %, renewable %, generation mix for every US subregion. EPA eGRID2023 Rev 2.
What APIs the EPA actually offers (none), what doesn't, and the practical options for accessing eGRID, AP-42, WebFIRE, and CHIEF data programmatically.
WebFIRE has no API. Honest map of the alternatives for accessing EPA emission factors via API in 2026.
Free hourly US grid carbon intensity from EIA-930. Working code for demand response backtesting and EV charging timing (not Scope 2 reporting). How much the hours differ by grid, and how to get this week's cleanest window for any ZIP.