Wyoming OSHA State Plan (Wyoming OSHA): what a contractor needs to know

Who the Wyoming OSHA plan covers

The Wyoming State Plan applies to private sector workplaces in the state with the exception of:

1. Employment at Yellowstone National Park;
2. Maritime employment, including shipyard employment, marine terminals, and longshoring;
3. Contract workers and contractor-operated facilities engaged in United States Postal Service (USPS) mail operations;
4. Employment on the Warren Air Force Base;
5. Employment at the U.S. Department of Energy's Naval Petroleum and Oil Shale Reserve in Casper;
6. Employment at private-sector hazardous-waste disposal facilities designated as Superfund sites;
7. The enforcement of the field sanitation standard (29 CFR 1928.110) and the enforcement of the temporary labor camps standard (29 CFR 1910.142) with respect to any agricultural establishment where workers are engaged in "agricultural employment" within the meaning of the Migrant and Seasonal Agricultural Worker Protection Act, 29 U.S.C. 1802(3) – regardless of the number of workers – including workers engaged in hand packing of produce into containers, whether done on the ground, on a moving machine, or in a temporary packing shed, except that Wyoming OSHA retains enforcement responsibility over agricultural temporary labor camps for workers engaged in egg, poultry, or red meat production, or the post-harvest processing of agricultural or horticultural commodities; and
8. All working conditions of aircraft cabin crewmembers onboard aircraft in operation.

In addition, any hazard, industry, geographical area, operation, or facility over which Wyoming OSHA is unable to effectively exercise jurisdiction for reasons not related to the required performance or structure of the plan shall be deemed to be an issue not covered by the final approved plan and subject to federal enforcement. Wyoming OSHA covers state and local government workers, but does not cover federal government employers including USPS. Federal OSHA covers the issues not covered by the Wyoming State Plan except that the Wage and Hour Division of the U.S. Department of Labor enforces the field sanitation standard and the temporary labor camps standard where Wyoming OSHA has not retained authority. Federal OSHA retains enforcement of the anti-retaliation provision of the Occupational Safety and Health Act of 1970, Section 11(c), 29 USC 660(c), with respect to the private sector. Wyoming OSHA investigates private and state and local government workplace retaliation cases under a provision analogous to Section 11(c).

Source: OSHA, Wyoming State Plan, read October 28, 2026.

Hazard communication in Wyoming

The federal compliance dates and how each State Plan adopted HCS 2024 are compared on HazCom deadlines 2026 and in HCS 2024 deadlines by State Plan. The rule every other State Plan cites is in the State Plan HazCom rule map.

Penalties and appeals

Key facts

• OSHA first approved the Wyoming State Plan on May 3, 1974 (39 FR 15395); final approval under section 18(e) came on June 27, 1985 (50 FR 26558). OSHA's page lists later changes: amended on January 17, 1997 (62 FR 2564), June 9, 2000 (65 FR 36628), and June 29, 2006 (71 FR 36990).
• A summary of the Wyoming State Plan is codified at 29 CFR 1952.18.
• OSHA lists 8 exceptions to the plan's private-sector coverage; federal OSHA covers the issues the plan does not, except the enforcement of the field sanitation and temporary labor camp standards in agricultural employment as the exception list describes, which is the responsibility of the Wage and Hour Division of the U.S. Department of Labor.
• Federal OSHA keeps enforcement of the anti-retaliation provision of section 11(c) of the OSH Act for the private sector, according to OSHA's page for the plan.
• In FY2025 (October 1, 2024 – September 30, 2025), Wyoming OSHA issued 89 construction citations in 37 inspections, with $263,867 in current penalties (OSHA cited-standards tool).