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

For Perchloroethylene, pel (ppm) is 25; pel (mg/m³) is 170; ceiling is 300 ppm; stel (ppm) is 100; stel (mg/m³) is 685, verified against its source on 2026-08-05.

- **Substance:** Perchloroethylene
- **PEL (ppm):** 25
- **PEL (mg/m³):** 170
- **Ceiling:** 300 ppm
- **STEL (ppm):** 100
- **STEL (mg/m³):** 685

## What the source says

> 127184 | | Perchloroethylene | 25 | 170 | 300 ppm | 100 | 685

## 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/).