# NAICS 331313: Alumina Refining and Primary Aluminum Production

The SBA size standard for NAICS 331313 is 1,300 employees (13 CFR 121.201).

| Field | Value |
| --- | --- |
| Code | 331313 |
| Title | Alumina Refining and Primary Aluminum Production |
| Level | 6 |
| Parent | 33131 |
| Size standard | 1,300 employees |
| Footnote | - |

## Description

This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) refining alumina (i.e., aluminum oxide) generally from bauxite; (2) making aluminum from alumina; and/or (3) making aluminum from alumina and rolling, drawing, extruding, or casting the aluminum they make into primary forms. Establishments in this industry may make primary aluminum or aluminum-based alloys from alumina.

## Sources

- Census NAICS: https://www.census.gov/naics/
- SBA size standards: https://www.sba.gov/document/support-table-size-standards

## API and MCP

- REST: GET https://samgovapi.io/api/v1/naics/331313/size-standard?revenue_usd=...
- MCP tools: naics_lookup, size_standard_check

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