# Chloroform; trichloromethane — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For Chloroform; trichloromethane, pel (ppm) is 2; pel (mg/m³) is 9.78, verified against its source on 2026-08-05.

- **Substance:** Chloroform; trichloromethane
- **PEL (ppm):** 2
- **PEL (mg/m³):** 9.78

## What the source says

> 67663 | | Chloroform; trichloromethane | 2 | 9.78

## Source

- https://www.dir.ca.gov/title8/5155.html

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).