COMAR 09.12.32 checklist
Employer checklist for Maryland heat stress: monitoring, plan, water, shade, acclimatization, training, and rest breaks.
COMAR 09.12.32 is Maryland heat stress standard for indoor and outdoor work. From heat index 80 F employers need monitoring, a written heat-related illness prevention and management plan, cool water at least 32 ounces per hour, shade or equivalent cooling, acclimatization, and training. Rest breaks step up above 90 F and again at 100 F. This checklist is the day-of operational list; confirm duties against the cited rule text.
Takeaways
- Run the COMAR checklist against a real heat-index reading.
- Separate 80 F baseline duties from 90 F and 100 F rest tiers.
- Keep training and monitoring records for at least one year.
- Store signed logs with the written plan for MOSH or broker requests.
What COMAR 09.12.32 expects
Exact COMAR thresholds
Employer actions for a COMAR action day
Records to keep
Frequently asked questions
- Is this checklist a substitute for the regulation? No. Use it as an operational aid and confirm duties against the current COMAR text and any MOSH guidance.
- Does COMAR apply under 80 F heat index? The numeric program duties in the RestShade pack start at heat index 80 F. Always confirm applicability against the current standard for your worksite.
- How does acclimatization reset? Newly heat-exposed employees and those returning after seven or more consecutive days away get up to 14 days of acclimatization under the Maryland pack.