# Data Dictionary - US Electricity Generation by Fuel & Region - EIA, cleaned Parquet

**Units:** vary by `fuel` - read the per-row `unit` column (overall: MWh).  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | EIA region (CAL, TEX, MIDW, …) |
| `ts` | timestamp (UTC) | Hour |
| `fuel` | str | Fuel type |
| `generation_mwh` | float | Generation, MWh |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (hourly) |

*Source: U.S. Energy Information Administration (EIA).*