# Data Dictionary - US Weekly Natural Gas Storage (Lower-48 + 5 regions) - EIA, cleaned Parquet

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

| column | type | description |
|---|---|---|
| `zone` | str | Always US |
| `ts` | timestamp (UTC) | Report week |
| `series` | str | Natural gas in storage (national) or a regional storage series (East / Midwest / Mountain / Pacific / South Central) |
| `bcf` | float | Working gas in storage, billion cubic feet |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (weekly = 10080) |

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