Colorado Heat Rules: What Actually Applies to Construction Crews
Updated July 23, 2026
Colorado has a heat rule, but not for construction. The state rule (7 CCR 1103-15) has applied to agricultural employers since 2022, and it still covers agriculture only. HB 26-1272, signed June 4, 2026, sets up a phased expansion of temperature protections to all industries, but it creates no heat-plan duty for construction employers yet. Today a Colorado crew works under the federal framework: the General Duty Clause and OSHA’s Heat National Emphasis Program.
Why Colorado shows up on "states with heat rules" lists
Press coverage counting six or seven heat-rule states folds in Colorado’s agriculture-only rule and Minnesota’s 1997 indoor-temperature rule. For a construction contractor the honest count is five states with a written heat-plan duty: California, Oregon, Washington, Nevada, and Maryland. Colorado is not one of them, and reading the ag rule as if it covered your crew would have you complying with the wrong requirements.
What HB 26-1272 actually does
The Extreme Temperatures Worker Protections act covers heat and cold, applies to indoor and outdoor workers across industries, and phases in deliberately. It starts with data, not duties: the state collects temperature-related injury and illness information first, publishes a model prevention plan, and may adopt targeted standards based on what the data shows. It does not hand construction employers a compliance checklist today.
| Date | What happens |
|---|---|
| June 4, 2026 | HB 26-1272 signed |
| August 12, 2026 | The act takes effect |
| January 2027 | The Division of Labor Standards and Statistics begins collecting temperature-related injury and illness data |
| By July 1, 2028 | A model temperature-related injury and illness prevention plan is published on the state website |
| After that | The state may adopt targeted standards if the data supports them |
What applies on a Colorado jobsite today
Colorado private-sector construction is under federal OSHA, so the enforcement path is the General Duty Clause plus the Heat National Emphasis Program (CPL 03-00-024, renewed through April 2031). Under the NEP, inspectors do not wait for a complaint: heat inquiries open during other inspections when conditions warrant, outdoor work around an 80 degree heat index gets attention, and the abatement methods they look for are water, rest, shade, acclimatization, and training.
What a Colorado contractor should do now
A written heat plan is not a Colorado legal requirement for construction today, and this page will say so until that changes. It is the abatement evidence that answers a General Duty Clause citation, what GCs ask for on summer bid packages, and a head start on whatever the HB 26-1272 process eventually adopts. TailgateDocs generates a Heat Illness Prevention Plan for $49, written to the federal NEP framework for states like Colorado without a contractor heat rule, delivered in about 4 minutes.
Common questions
▸Does Colorado require a heat illness prevention plan for construction?
No. As of July 2026 the state heat rule covers agriculture only, and the HB 26-1272 expansion has not produced any standard for other industries. Construction crews fall under the federal General Duty Clause and Heat NEP.
▸What is 7 CCR 1103-15?
Colorado’s agricultural labor conditions rule, in effect since 2022, which includes heat protections for agricultural workers. It does not apply to construction.
▸When will Colorado heat rules cover all industries?
No adopted date exists. HB 26-1272 phases in: data collection begins in January 2027, a model prevention plan is due by July 1, 2028, and targeted standards may follow based on the data. Until a standard is adopted, no new heat-plan duty applies.
▸Should Colorado contractors wait for the state rule?
The federal Heat NEP applies now, and its expected abatement methods are the same elements any future Colorado standard would formalize. A written plan covers the enforcement that exists today.
Official sources
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