OSHA Airborne Lead Limit for a Work Day Over 8 Hours (29 CFR 1910.1025(c)(2))
OSHA airborne lead limit for a work day over 8 hours: 400 divided by the hours worked, in µg/m³ (29 CFR 1910.1025(c)(2)).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Hours worked in the day
- 10
- Measured airborne lead, TWA for the day
- 45
Result: Measured 45 µg/m³ exceeds the day's limit of 40 µg/m³.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Hours worked in the day
- Measured airborne lead, TWA for the day (µg/m³)
How this is calculated
Citation
Occupational Safety and Health Administration. Lead, 29 CFR 1910.1025: paragraph (b) (the 30 µg/m³ action level), paragraph (c)(1) (the 50 µg/m³ limit) and paragraph (c)(2) (400 ÷ hours worked for a day over 8 hours). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.