COMAR 09.12.32
For COMAR 09.12.32, jurisdiction is Maryland; effective date is September 30, 2024; initial trigger temperature f is 80; initial trigger actions is Provide shaded areas as close to work area as practicable, open to air on at least three sides; provide cool potable drinking water; allow preventative cool-down rest periods; high heat trigger temperature f is 90, recorded from its source on 2026-08-17.
- jurisdiction
- Maryland verified
- regulation citation
- COMAR 09.12.32 verified
- effective date
- September 30, 2024 our reading
- initial trigger temperature f
- 80 verified
- initial trigger actions
- Provide shaded areas as close to work area as practicable, open to air on at least three sides; provide cool potable drinking water; allow preventative cool-down rest periods our reading
- high heat trigger temperature f
- 90 verified
- high heat actions
- Minimum rest period of 10 minutes for every 2 hours worked at heat index above 90°F and below 100°F; minimum rest period of 15 minutes for every hour worked at heat index above 100°F; monitor exposed employees via phone, radio, buddy system, or other effective observation; rest periods taken in shade our reading
- coverage scope
- Indoor and outdoor; all industries where heat index equals or exceeds 80°F; exempt: emergency operations and essential services, incidental exposure under 15 consecutive min/hr, mechanically ventilated buildings/vehicles below 80°F our reading
- acclimatization period days
- 14 verified
- written plan required
- Yes our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
This chapter applies to an employer with employees whose employment activities, indoor or outdoor, expose employees to a heat index in the area where the employee is working that equals or exceeds 80 degrees Fahrenheit.
— regs.maryland.gov, retrieved 2026-08-17
Source
- regs.maryland.govhttps://regs.maryland.gov/us/md/exec/comar/09.12.32.02